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1,086 results on '"Shimwell, T."'

401. Direct Radio Discovery of a Cold Brown Dwarf

Author

Vedantham, H. K., primary, Callingham, J. R., additional, Shimwell, T. W., additional, Dupuy, T., additional, Best, William M. J., additional, Liu, Michael C., additional, Zhang, Zhoujian, additional, De, K., additional, Lamy, L., additional, Zarka, P., additional, Röttgering, H. J. A., additional, and Shulevski, A., additional

Published
2020
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402. A population of galaxy-scale jets discovered using LOFAR

Author

Webster, B, primary, Croston, J H, additional, Mingo, B, additional, Baldi, R D, additional, Barkus, B, additional, Gürkan, G, additional, Hardcastle, M J, additional, Morganti, R, additional, Röttgering, H J A, additional, Sabater, J, additional, Shimwell, T W, additional, Tasse, C, additional, and White, G J, additional

Published
2020
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404. The great Kite in the sky: A LOFAR observation of the radio source in Abell 2626

Author

Ignesti, A., primary, Shimwell, T., additional, Brunetti, G., additional, Gitti, M., additional, Intema, H., additional, van Weeren, R. J., additional, Hardcastle, M. J., additional, Clarke, A. O., additional, Botteon, A., additional, Di Gennaro, G., additional, Brüggen, M., additional, Browne, I. W. A., additional, Mandal, S., additional, Röttgering, H. J. A., additional, Cuciti, V., additional, de Gasperin, F., additional, Cassano, R., additional, and Scaife, A. M. M., additional

Published
2020
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405. One- and two-point source statistics from the LOFAR Two-metre Sky Survey first data release

Author

Siewert, T. M., primary, Hale, C., additional, Bhardwaj, N., additional, Biermann, M., additional, Bacon, D. J., additional, Jarvis, M., additional, Röttgering, H. J .A., additional, Schwarz, D. J., additional, Shimwell, T., additional, Best, P. N., additional, Duncan, K. J., additional, Hardcastle, M. J., additional, Sabater, J., additional, Tasse, C., additional, White, G. J., additional, and Williams, W. L., additional

Published
2020
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406. Alignment in the orientation of LOFAR radio sources

Author

Osinga, E., primary, Miley, G. K., additional, van Weeren, R. J., additional, Shimwell, T. W., additional, Duncan, K. J., additional, Hardcastle, M. J., additional, Mechev, A. P., additional, Röttgering, H. J. A., additional, Tasse, C., additional, and Williams, W. L., additional

Published
2020
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407. Reaching thermal noise at ultra-low radio frequencies

Author

de Gasperin, F., primary, Brunetti, G., additional, Brüggen, M., additional, van Weeren, R., additional, Williams, W. L., additional, Botteon, A., additional, Cuciti, V., additional, Dijkema, T. J., additional, Edler, H., additional, Iacobelli, M., additional, Kang, H., additional, Offringa, A., additional, Orrú, E., additional, Pizzo, R., additional, Rafferty, D., additional, Röttgering, H., additional, and Shimwell, T., additional

Published
2020
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408. A giant radio bridge connecting two clusters in Abell 1758

Author

Botteon, A, primary, van Weeren, R J, additional, Brunetti, G, additional, de Gasperin, F, additional, Intema, H T, additional, Osinga, E, additional, Gennaro, G Di, additional, Shimwell, T W, additional, Bonafede, A, additional, Brüggen, M, additional, Cassano, R, additional, Cuciti, V, additional, Dallacasa, D, additional, Gastaldello, F, additional, Mandal, S, additional, Rossetti, M, additional, and Röttgering, H J A, additional

Published
2020
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409. The origin of radio emission in broad absorption line quasars: Results from the LOFAR Two-metre Sky Survey (Corrigendum)

Author

Morabito, L. K., primary, Matthews, J. H., additional, Best, P. N., additional, Gürkan, G., additional, Jarvis, M. J., additional, Prandoni, I., additional, Duncan, K. J., additional, Hardcastle, M. J., additional, Kunert-Bajraszewska, M., additional, Mechev, A. P., additional, Mooney, S., additional, Sabater, J., additional, Röttgering, H. J. A., additional, Shimwell, T. W., additional, Smith, D. J. B., additional, Tasse, C., additional, and Williams, W. L., additional

Published
2020
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410. The Beautiful Mess in Abell 2255

Author

Botteon, A., primary, Brunetti, G., additional, van Weeren, R. J., additional, Shimwell, T. W., additional, Pizzo, R. F., additional, Cassano, R., additional, Iacobelli, M., additional, Gastaldello, F., additional, Bîrzan, L., additional, Bonafede, A., additional, Brüggen, M., additional, Cuciti, V., additional, Dallacasa, D., additional, de Gasperin, F., additional, Di Gennaro, G., additional, Drabent, A., additional, Hardcastle, M. J., additional, Hoeft, M., additional, Mandal, S., additional, Röttgering, H. J. A., additional, and Simionescu, A., additional

Published
2020
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411. LOFAR observations of X-ray cavity systems

Author

Bîrzan, L, primary, Rafferty, D A, primary, Brüggen, M, primary, Botteon, A, primary, Brunetti, G, primary, Cuciti, V, primary, Edge, A C, primary, Morganti, R, primary, Röttgering, H J A, primary, and Shimwell, T W, primary

Published
2020
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412. The life cycle of radio galaxies in the LOFAR Lockman Hole field

Author

Jurlin, N., primary, Morganti, R., additional, Brienza, M., additional, Mandal, S., additional, Maddox, N., additional, Duncan, K. J., additional, Shabala, S. S., additional, Hardcastle, M. J., additional, Prandoni, I., additional, Röttgering, H. J. A., additional, Mahatma, V., additional, Best, P. N., additional, Mingo, B., additional, Sabater, J., additional, Shimwell, T. W., additional, and Tasse, C., additional

Published
2020
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415. LOFAR 144-MHz follow-up observations of GW170817

Author

Broderick, J W, primary, Shimwell, T W, primary, Gourdji, K, primary, Rowlinson, A, primary, Nissanke, S, primary, Hotokezaka, K, primary, Jonker, P G, primary, Tasse, C, primary, Hardcastle, M J, primary, Oonk, J B R, primary, Fender, R P, primary, Wijers, R A M J, primary, Shulevski, A, primary, Stewart, A J, primary, ter Veen, S, primary, Moss, V A, primary, van der Wiel, M H D, primary, Nichols, D A, primary, Piette, A, primary, Bell, M E, primary, Carbone, D, primary, Corbel, S, primary, Eislöffel, J, primary, Grießmeier, J-M, primary, Keane, E F, primary, Law, C J, primary, Muñoz-Darias, T, primary, Pietka, M, primary, Serylak, M, primary, van der Horst, A J, primary, van Leeuwen, J, primary, Wijnands, R, primary, Zarka, P, primary, Anderson, J M, primary, Bentum, M J, primary, Blaauw, R, primary, Brouw, W N, primary, Brüggen, M, primary, Ciardi, B, primary, de Vos, M, primary, Duscha, S, primary, Fallows, R A, primary, Franzen, T M O, primary, Garrett, M A, primary, Gunst, A W, primary, Hoeft, M, primary, Hörandel, J R, primary, Iacobelli, M, primary, Jütte, E, primary, Koopmans, L V E, primary, Krankowski, A, primary, Maat, P, primary, Mann, G, primary, Mulder, H, primary, Nelles, A, primary, Paas, H, primary, Pandey-Pommier, M, primary, Pekal, R, primary, Reich, W, primary, Röttgering, H J A, primary, Schwarz, D J, primary, Smirnov, O, primary, Soida, M, primary, Toribio, M C, primary, van Haarlem, M P, primary, van Weeren, R J, primary, Vocks, C, primary, Wucknitz, O, primary, and Zucca, P, primary

Published
2020
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416. Giant radio galaxies in the LOFAR Two-metre Sky Survey

Author

Dabhade, P., primary, Röttgering, H. J. A., additional, Bagchi, J., additional, Shimwell, T. W., additional, Hardcastle, M. J., additional, Sankhyayan, S., additional, Morganti, R., additional, Jamrozy, M., additional, Shulevski, A., additional, and Duncan, K. J., additional

Published
2020
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417. Coherent radio emission from a quiescent red dwarf indicative of star–planet interaction

Author

Vedantham, H. K., primary, Callingham, J. R., additional, Shimwell, T. W., additional, Tasse, C., additional, Pope, B. J. S., additional, Bedell, M., additional, Snellen, I., additional, Best, P., additional, Hardcastle, M. J., additional, Haverkorn, M., additional, Mechev, A., additional, O’Sullivan, S. P., additional, Röttgering, H. J. A., additional, and White, G. J., additional

Published
2020
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418. Revived fossil plasma sources in galaxy clusters

Author

Mandal, S., primary, Intema, H. T., additional, van Weeren, R. J., additional, Shimwell, T. W., additional, Botteon, A., additional, Brunetti, G., additional, de Gasperin, F., additional, Brüggen, M., additional, Di Gennaro, G., additional, Kraft, R., additional, Röttgering, H. J. A., additional, Hardcastle, M., additional, and Tasse, C., additional

Published
2020
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420. CHANG-ES XXIII: influence of a galactic wind in NGC 5775.

Author

Heald, G H, Heesen, V, Sridhar, S S, Beck, R, Bomans, D J, Brüggen, M, Chyży, K T, Damas-Segovia, A, Dettmar, R-J, English, J, Henriksen, R, Ideguchi, S, Irwin, J, Krause, M, Li, J-T, Murphy, E J, Nikiel-Wroczyński, B, Piotrowska, J, Rand, R J, and Shimwell, T

Subjects
STELLAR evolution, MAGNETIC flux density, INTERSTELLAR medium, COSMIC rays, STARBURSTS, GALACTIC magnetic fields, STELLAR winds
Abstract

We present new radio continuum images of the edge-on starburst galaxy NGC 5775, from LOFAR (140 MHz) and the Karl G. Jansky Very Large Array CHANG-ES survey (1500 MHz). We trace the non-thermal radio halo up to 13 kpc from the disc, measuring the non-thermal spectral index and estimating the total equipartition magnetic field strength (≈13  |$\mu$| G in the disc and ≈7  |$\mu$| G above the plane). The radio halo has a similar extent at both frequencies, displays evidence for localized cosmic ray streaming coinciding with prominent H α filaments and vertical extensions of the regular magnetic field, and exhibits a boxy morphology especially at 140 MHz. In order to understand the nature of the disc–halo flow, we extend our previous model of cosmic ray propagation by implementing an iso-thermal wind with a tunable 'flux tube' (approximately hyperboloidal) geometry. This updated model is successful in matching the vertical distribution of non-thermal radio emission, and the vertical steepening of the associated spectral index, in a consistent conceptual framework with few free parameters. Our new model provides the opportunity to estimate the mass outflow driven by the star formation process, and we find an implied rate of |$\dot{M}\approx 3$| – |$6\, \mathrm{M_{\odot }\, yr^{-1}}$| (≈40–80 per cent of the star formation rate) if the escape velocity is reached, with substantial uncertainty arising from the poorly understood distribution of interstellar medium material entrained in the vertical flow. The wind may play a role in influencing the vertical gradient in rotational velocity. [ABSTRACT FROM AUTHOR]

Published
2022
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421. Realising the LOFAR Two-Metre Sky Survey -- using the supercomputer JUWELS at the Forschungszentrum Jülich

Author

Brüggen, M., Tsigenov, O., Oonk, J., Drabent, A., Hoeft, M., Sweijen, F., Manzano, C., Shimwell, T., Danezi, A., Schwarz, D., Mechev, A., Schrijvers, C., and Dettmar, R.

Subjects
FOS: Physical sciences, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

The new generation of high-resolution broad-band radio telescopes, like the Low Frequency Array (LOFAR), produces, depending on the level of compression, between 1 to 10 TB of data per hour after correlation. Such a large amount of scientific data demand powerful computing resources and efficient data handling strategies to be mastered. The LOFAR Two-metre Sky Survey (LoTSS) is a Key Science Project (KSP) of the LOFAR telescope. It aims to map the entire northern hemisphere at unprecedented sensitivity and resolution. The survey consist of 3 168 pointings, requiring about 30 PBytes of storage space. As a member of the German Long Wavelength Consortioum (GLOW) the Forschungszentrum J\"ulich (FSZ) stores in the Long Term Archive (LTA) about 50% of all LoTSS observations conducted to date. In collaboration with SURFsara in Amsterdam we developed service tools that enable the KSP to process LOFAR data stored in the J\"ulich LTA at the supercomputer JUWELS in an automated and robust fashion. Through our system more than 500 out of 800 existing LoTSS observations have already been processed with the prefactor pipeline. This pipeline calibrates the direction-independent instrumental and ionospheric effects and furthermore reduces the data size significantly. For continuum imaging, this processing pipeline is the standard pipeline that is executed before more advanced processing and image reconstruction methods are applied., Comment: 10 pages, 6 figures, NIC Symposium 2020, accepted

Published
2019

422. Giant radio galaxies in the LOFAR Two-metre Sky Survey-I

Author

Dabhade, P., Rottgering, H. J. A., Bagchi, J., Shimwell, T. W., Hardcastle, M. J., Sankhyayan, S., Morganti, R., Jamrozy, M., Shulevski, A., and Duncan, K. J.

Subjects
Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics - Astrophysics of Galaxies
Abstract

Giant radio galaxies (GRGs) are a subclass of radio galaxies which have grown to megaparsec scales. GRGs are much rarer than normal sized radio galaxies (< 0.7 Mpc) and the reason for their gigantic sizes is still debated. Here, we report the biggest sample of GRGs identified to date. These objects were found in the LOFAR Two-metre Sky Survey (LoTSS) first data release images, which cover a 424 square degrees region. Of the 239 GRGs found, 225 are new discoveries. The GRGs in our sample have sizes ranging from 0.7 to 3.5 Mpc and have redshifts (z) between 0.1 and 2.3. Seven GRGs have sizes above 2 Mpc and one has a size of ~ 3.5 Mpc. The sample contains 40 GRGs hosted by spectroscopically confirmed quasars. Here, we present the search techniques employed and the resulting catalogue of the newly discovered large sample of GRGs along with their radio properties. We, here also show for the first time that the spectral index of GRGs is similar to that of normal sized radio galaxies, indicating that most of the GRG population is not dead or is not like remnant type radio galaxy. We find 20/239 GRGs in our sample are located at the centres of clusters and present our analysis on their cluster environment and radio morphology., Accepted for publication in Astronomy & Astrophysics

Published
2019

423. Radio-loud AGN in the first LoTSS data release:The lifetimes and environmental impact of jet-driven sources

Author

Hardcastle, M. J., Williams, W. L., Best, P. N., Croston, J. H., Duncan, K. J., Rottgering, H. J. A., Sabater, J., Shimwell, T. W., Tasse, C., Callingham, J. R., Cochrane, R. K., Gasperin, F. de, Gurkan, G., Jarvis, M. J., Mahatma, V., Miley, G. K., Mingo, B., Mooney, S., Morabito, L. K., O'Sullivan, S. P., Prandoni, I., Shulevski, A., and Smith, D. J. B.

Subjects
astro-ph.HE, astro-ph.GA, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

We constructed a sample of 23,344 radio-loud active galactic nuclei (RLAGN) from the catalogue derived from the LOFAR Two-Metre Sky Survey (LoTSS) survey of the HETDEX Spring field. Although separating AGN from star-forming galaxies remains challenging, the combination of spectroscopic and photometric techniques we used gives us one of the largest available samples of candidate RLAGN. We used the sample, combined with recently developed analytical models, to investigate the lifetime distribution of RLAGN. We show that large or giant powerful RLAGN are probably the old tail of the general RLAGN population, but that the low-luminosity RLAGN candidates in our sample, many of which have sizes $

Published
2019

424. LOFAR first look at the giant radio galaxy 3C 236

Author

Shulevski, A., Barthel, P. D., Morganti, R., Harwood, J. J., Brienza, M., Shimwell, T. W., Röttgering, H. J. A., White, G. J., Callingham, J. R., Mooney, S., and Rafferty, D. A.

Subjects
Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics - Astrophysics of Galaxies
Abstract

We have examined the giant radio galaxy 3C~236 using LOFAR at 143 MHz down to an angular resolution of 7", in combination with observations at higher frequencies. We have used the low frequency data to derive spectral index maps with the highest resolution yet at these low frequencies. We confirm a previous detection of an inner hotspot in the north-west lobe and for the first time observe that the south-east lobe hotspot is in fact a triple hotspot, which may point to an intermittent source activity. Also, the spectral index map of 3C 236 shows that the spectral steepening at the inner region of the northern lobe is prominent at low frequencies. The outer regions of both lobes show spectral flattening, in contrast with previous high frequency studies. We derive spectral age estimates for the lobes, as well as particle densities of the IGM at various locations. We propose that the morphological differences between the lobes are driven by variations in the ambient medium density as well as the source activity history., Comment: 10 pages, 6 6figures

Published
2019
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425. NGC 326: X-shaped no more

Author

Hardcastle, M. J., Croston, J. H., Shimwell, T. W., Tasse, C., Gurkan, G., Morganti, R., Murgia, M., Rottgering, H. J. A., van Weeren, R. J., and Williams, W. L.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

We present new 144-MHz LOFAR observations of the prototypical `X-shaped' radio galaxy NGC 326, which show that the formerly known wings of the radio lobes extend smoothly into a large-scale, complex radio structure. We argue that this structure is most likely the result of hydrodynamical effects in an ongoing group or cluster merger, for which pre-existing X-ray and optical data provide independent evidence. The large-scale radio structure is hard to explain purely in terms of jet reorientation due to the merger of binary black holes, a previously proposed explanation for the inner structure of NGC 326. For this reason, we suggest that the simplest model is one in which the merger-related hydrodynamical processes account for all the source structure, though we do not rule out the possibility that a black hole merger has occurred. Inference of the black hole-black hole merger rate from observations of X-shaped sources should be carried out with caution in the absence of deep, sensitive low-frequency observations. Some X-shaped sources may be signposts of cluster merger activity, and it would be useful to investigate the environments of these objects more generally., 7 pages, 2 colour figures. Accepted by MNRAS

Published
2019
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426. Revived Fossil Plasma Sources in Galaxy Clusters

Author

Mandal, S., Intema, H. T., van Weeren, R. J., Shimwell, T. W., Botteon, A., Brunetti, G., de Gasperin, F., Brüggen, M., Di Gennaro, G., Kraft, R., Röttgering, H. J. A., Hardcastle, M., Tasse, C., Mandal, S., Intema, H. T., van Weeren, R. J., Shimwell, T. W., Botteon, A., Brunetti, G., de Gasperin, F., Brüggen, M., Di Gennaro, G., Kraft, R., Röttgering, H. J. A., Hardcastle, M., and Tasse, C.

Abstract

It is well established that particle acceleration by shocks and turbulence in the intra-cluster medium can produce cluster-scale synchrotron emitting sources. However, the detailed physics of these particle acceleration processes is still not well understood. One of the main open questions is the role of fossil relativistic electrons that have been deposited in the intra-cluster medium by radio galaxies. These synchrotron-emitting electrons are very difficult to study, as their radiative life time is only tens of Myrs at GHz frequencies, and are therefore a relatively unexplored population. Despite the typical steep radio spectrum due to synchrotron losses, these fossil electrons are barely visible even at radio frequencies well below a GHz. However, when a pocket of fossil radio plasma is compressed, it boosts the visibility at sub-GHz frequencies, creating so-called radio phoenices. This compression can be the result of bulk motion and shocks in the ICM due to merger activity. In this paper, we demonstrate the discovery potential of low frequency radio sky surveys to find and study revived fossil plasma sources in galaxy clusters. We used the 150~MHz TGSS and 1.4 GHz NVSS sky surveys to identify candidate radio phoenices. A subset of three candidates were studied in detail using deep multi-band radio observations (LOFAR and GMRT), X-ray (\textit{Chandra} or \textit{XMM-Newton}) and archival optical observations. Two of the three sources are new discoveries. Using these observations, we identified common observational properties (radio morphology, ultra-steep spectrum, X-ray luminosity, dynamical state) that will enable us to identify this class of sources more easily, and help to understand the physical origin of these sources., Comment: 12 pages, 5 figures; Accepted for publication in Astronomy and Astrophysics

Published
2019
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427. Realising the LOFAR Two-Metre Sky Survey -- using the supercomputer JUWELS at the Forschungszentrum J\'ulich

Author

Drabent, A., Hoeft, M., Mechev, A. P., Oonk, J. B. R., Shimwell, T. W., Sweijen, F., Danezi, A., Schrijvers, C., Manzano, C., Tsigenov, O., Dettmar, R. -J., Brüggen, M., Schwarz, D. J., Drabent, A., Hoeft, M., Mechev, A. P., Oonk, J. B. R., Shimwell, T. W., Sweijen, F., Danezi, A., Schrijvers, C., Manzano, C., Tsigenov, O., Dettmar, R. -J., Brüggen, M., and Schwarz, D. J.

Abstract

The new generation of high-resolution broad-band radio telescopes, like the Low Frequency Array (LOFAR), produces, depending on the level of compression, between 1 to 10 TB of data per hour after correlation. Such a large amount of scientific data demand powerful computing resources and efficient data handling strategies to be mastered. The LOFAR Two-metre Sky Survey (LoTSS) is a Key Science Project (KSP) of the LOFAR telescope. It aims to map the entire northern hemisphere at unprecedented sensitivity and resolution. The survey consist of 3 168 pointings, requiring about 30 PBytes of storage space. As a member of the German Long Wavelength Consortioum (GLOW) the Forschungszentrum J\"ulich (FSZ) stores in the Long Term Archive (LTA) about 50% of all LoTSS observations conducted to date. In collaboration with SURFsara in Amsterdam we developed service tools that enable the KSP to process LOFAR data stored in the J\"ulich LTA at the supercomputer JUWELS in an automated and robust fashion. Through our system more than 500 out of 800 existing LoTSS observations have already been processed with the prefactor pipeline. This pipeline calibrates the direction-independent instrumental and ionospheric effects and furthermore reduces the data size significantly. For continuum imaging, this processing pipeline is the standard pipeline that is executed before more advanced processing and image reconstruction methods are applied., Comment: 10 pages, 6 figures, NIC Symposium 2020, accepted

Published
2019

428. Differences in radio emission from similar M dwarfs in the binary system Ross 867-8

Author

Quiroga-Nuñez, L. H., Intema, H. T., Callingham, J. R., Villadsen, J., van Langevelde, H. J., Jagannathan, P., Shimwell, T. W., Boven, E. P., Quiroga-Nuñez, L. H., Intema, H. T., Callingham, J. R., Villadsen, J., van Langevelde, H. J., Jagannathan, P., Shimwell, T. W., and Boven, E. P.

Abstract

Serendipitously, we have rediscovered radio emission from the binary system Ross 867 (M4.5V) and Ross 868 (M3.5V) while inspecting archival Giant Metrewave Radio Telescope (GMRT) observations. The binary system consists of two M-dwarf stars that share common characteristics such as spectral type, astrometric parameters, age and emission at infrared, optical and X-rays frequencies. The GMRT data at 610 MHz taken on July 2011 shows that the radio emission from Ross 867 is polarized and highly variable on hour time scales with a peak flux of 10.4 $\pm$ 0.7 mJy/beam. Additionally, after reviewing archival data from several observatories (VLA, GMRT, JVLA and LOFAR), we confirm that although both stars are likely coeval, only Ross 867 has been detected, while Ross 868 remains undetected at radio wavelengths. As they have a a large orbital separation, this binary stellar system provides a coeval laboratory to examine and constrain the stellar properties linked to radio activity in M dwarfs. We speculate that the observed difference in radio activity between the dwarfs could be due to vastly different magnetic field topologies or that Ross 867 has an intrinsically different dynamo., Comment: Accepted for publication in A&A. Language edition included

Published
2019
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429. LOFAR early-time search for coherent radio emission from GRB 180706A

Author

Rowlinson, A., Gourdji, K., van der Meulen, K., Meyers, Z. S., Shimwell, T. W., ter Veen, S., Wijers, R. A. M. J., Kuiack, M. J., Shulevski, A., Broderick, J. W., van der Horst, A. J., Tasse, C., Hardcastle, M. J., Mechev, A. P., Williams, W. L., Rowlinson, A., Gourdji, K., van der Meulen, K., Meyers, Z. S., Shimwell, T. W., ter Veen, S., Wijers, R. A. M. J., Kuiack, M. J., Shulevski, A., Broderick, J. W., van der Horst, A. J., Tasse, C., Hardcastle, M. J., Mechev, A. P., and Williams, W. L.

Abstract

The nature of the central engines of gamma-ray bursts (GRBs) and the composition of their relativistic jets are still under debate. If the jets are Poynting flux dominated rather than baryon dominated, a coherent radio flare from magnetic re-connection events might be expected with the prompt gamma-ray emission. There are two competing models for the central engines of GRBs; a black hole or a newly formed milli-second magnetar. If the central engine is a magnetar it is predicted to produce coherent radio emission as persistent or flaring activity. In this paper, we present the deepest limits to date for this emission following LOFAR rapid response observations of GRB 180706A. No emission is detected to a 3$\sigma$ limit of 1.7 mJy beam$^{-1}$ at 144 MHz in a two-hour LOFAR observation starting 4.5 minutes after the gamma-ray trigger. A forced source extraction at the position of GRB 180706A provides a marginally positive (1 sigma) peak flux density of $1.1 \pm 0.9$ mJy. The data were time-sliced into different sets of snapshot durations to search for FRB like emission. No short duration emission was detected at the location of the GRB. We compare these results to theoretical models and discuss the implications of a non-detection., Comment: MNRAS accepted, 11 pages, 5 figures

Published
2019
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430. Particle acceleration in a nearby galaxy cluster pair: the role of cluster dynamics

Author

Botteon, A., Cassano, R., Eckert, D., Brunetti, G., Dallacasa, D., Shimwell, T. W., van Weeren, R. J., Gastaldello, F., Bonafede, A., Brüggen, M., Bîrzan, L., Clavico, S., Cuciti, V., de Gasperin, F., De Grandi, S., Ettori, S., Ghizzardi, S., Rossetti, M., Röttgering, H. J. A., Sereno, M., Botteon, A., Cassano, R., Eckert, D., Brunetti, G., Dallacasa, D., Shimwell, T. W., van Weeren, R. J., Gastaldello, F., Bonafede, A., Brüggen, M., Bîrzan, L., Clavico, S., Cuciti, V., de Gasperin, F., De Grandi, S., Ettori, S., Ghizzardi, S., Rossetti, M., Röttgering, H. J. A., and Sereno, M.

Abstract

Diffuse radio emission associated with the intra-cluster medium (ICM) is observed in a number of merging galaxy clusters. It is currently believed that in mergers a fraction of the kinetic energy is channeled into non-thermal components, such as turbulence, cosmic rays and magnetic fields, that may lead to the formation of giant synchrotron sources in the ICM. Studying merging galaxy clusters in different evolutionary phases is fundamental to understanding the origin of radio emission in the ICM. We observed the nearby galaxy cluster pair RXC J1825.3+3026 ($z\sim0.065$) and CIZA J1824.1+3029 ($z\sim0.071$) at 120-168 MHz with the LOw Frequency ARray (LOFAR) and made use of a deep (240 ks) XMM-Newton dataset to study the non-thermal and thermal properties of the system. RXC J1825.3+3026 is in a complex dynamical state, with a primary on-going merger in the E-W direction and a secondary later stage merger with a group of galaxies in the SW, while CIZA J1824.1+3029 is dynamically relaxed. These two clusters are in a pre-merger phase. We report the discovery of a Mpc-scale radio halo with a low surface brightness extension in RXC J1825.3+3026 that follows the X-ray emission from the cluster center to the remnant of a galaxy group in the SW. This is among the least massive systems and the faintest giant radio halo known to date. Contrary to this, no diffuse radio emission is observed in CIZA J1824.1+3029 nor in the region between the pre-merger cluster pair. The power spectra of the X-ray surface brightness fluctuations of RXC J1825.3+3026 and CIZA J1824.1+3029 are in agreement with the findings for clusters exhibiting a radio halo and the ones where no radio emission has been detected, respectively. We provide quantitative support to the idea that cluster mergers play a crucial role in the generation of non-thermal components in the ICM., Comment: 7 pages, 5 figures, 1 table, accepted for publication in A&A

Published
2019
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431. A LOFAR-IRAS cross-match study: the far-infrared radio correlation and the 150-MHz luminosity as a star-formation rate

Author

Wang, L., Gao, F., Duncan, K. J., Williams, W. L., Rowan-Robinson, M., Sabater, J., Shimwell, T. W., Bonato, M., Calistro-Rivera, G., Chyzy, K. T., Farrah, D., Gurkan, G., Hardcastle, M. J., McCheyne, I., Prandoni, I., Read, S. C., Rottgering, H. J. A., Smith, D. J. B., Wang, L., Gao, F., Duncan, K. J., Williams, W. L., Rowan-Robinson, M., Sabater, J., Shimwell, T. W., Bonato, M., Calistro-Rivera, G., Chyzy, K. T., Farrah, D., Gurkan, G., Hardcastle, M. J., McCheyne, I., Prandoni, I., Read, S. C., Rottgering, H. J. A., and Smith, D. J. B.

Abstract

Aims. We aim to study the far-infrared radio correlation (FIRC) at 150 MHz in the local Universe (at a median redshift z~0:05) and improve the use of the rest-frame 150-MHz luminosity, L150, as a star-formation rate (SFR) tracer, which is unaffected by dust extinction. Methods. We cross-match the 60-um selected Revised IRAS Faint Source Survey Redshift (RIFSCz) catalogue and the 150-MHz selected LOFAR value-added source catalogue in the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) Spring Field. We estimate L150 for the cross-matched sources and compare it with the total infrared (IR) luminosity, LIR, and various SFR tracers. Results. We find a tight linear correlation between log L150 and log LIR for star-forming galaxies, with a slope of 1.37. The median qIR value (defined as the logarithm of the LIR to L150 ratio) and its rms scatter of our main sample are 2.14 and 0.34, respectively. We also find that log L150 correlates tightly with the logarithm of SFR derived from three different tracers, i.e., SFR_Halpha based on the Halpha line luminosity, SFR_60 based on the rest-frame 60-um luminosity and SFR_IR based on LIR, with a scatter of 0.3 dex. Our best-fit relations between L150 and these SFR tracers are, log L150 (Lsun) = 1.35(0.06) x log SFR_Halpha (Msun/yr) + 3.20(0.06), log L150 (Lsun) = 1.31(0.05) x log SFR_60 (Msun/yr) + 3.14(0.06), and log L150 (Lsun) = 1.37(0.05) x log SFR_IR (Msun/yr) + 3.09(0.05), which show excellent agreement with each other., Comment: 13 pages, 13 figures, accepted for publication in A&A

Published
2019
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432. A radio ridge connecting two galaxy clusters in a filament of the cosmic web

Author

Govoni, F., Orrù, E., Bonafede, A., Iacobelli, M., Paladino, R., Vazza, F., Murgia, M., Vacca, V., Giovannini, G., Feretti, L., Loi, F., Bernardi, G., Ferrari, C., Pizzo, R. F., Gheller, C., Manti, S., Brüggen, M., Brunetti, G., Cassano, R., de Gasperin, F., Enßlin, T. A., Hoeft, M., Horellou, C., Junklewitz, H., Röttgering, H. J. A., Scaife, A. M. M., Shimwell, T. W., van Weeren, R. J., Wise, M., Govoni, F., Orrù, E., Bonafede, A., Iacobelli, M., Paladino, R., Vazza, F., Murgia, M., Vacca, V., Giovannini, G., Feretti, L., Loi, F., Bernardi, G., Ferrari, C., Pizzo, R. F., Gheller, C., Manti, S., Brüggen, M., Brunetti, G., Cassano, R., de Gasperin, F., Enßlin, T. A., Hoeft, M., Horellou, C., Junklewitz, H., Röttgering, H. J. A., Scaife, A. M. M., Shimwell, T. W., van Weeren, R. J., and Wise, M.

Abstract

Galaxy clusters are the most massive gravitationally bound structures in the Universe. They grow by accreting smaller structures in a merging process that produces shocks and turbulence in the intra-cluster gas. We observed a ridge of radio emission connecting the merging galaxy clusters Abell 0399 and Abell 0401 with the Low Frequency Array (LOFAR) at 140 MHz. This emission requires a population of relativistic electrons and a magnetic field located in a filament between the two galaxy clusters. We performed simulations to show that a volume-filling distribution of weak shocks may re-accelerate a pre-existing population of relativistic particles, producing emission at radio wavelengths that illuminates the magnetic ridge., Comment: Published in Science

Published
2019
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433. LOFAR discovery of a radio halo in the high-redshift galaxy cluster PSZ2 G099.86+58.45

Author

Cassano, R., Botteon, A., Di Gennaro, G., Brunetti, G., Sereno, M., Shimwell, T. W., van Weeren, R. J., Brüggen, M., Gastaldello, F., Izzo, L., Bîrzan, L., Bonafede, A., Cuciti, V., de Gasperin, F., Rötttgering, H. J. A., Hardcastle, M., Mechev, A. P., Tasse, C., Cassano, R., Botteon, A., Di Gennaro, G., Brunetti, G., Sereno, M., Shimwell, T. W., van Weeren, R. J., Brüggen, M., Gastaldello, F., Izzo, L., Bîrzan, L., Bonafede, A., Cuciti, V., de Gasperin, F., Rötttgering, H. J. A., Hardcastle, M., Mechev, A. P., and Tasse, C.

Abstract

In this Letter, we report the discovery of a radio halo in the high-redshift galaxy cluster PSZ2 G099.86+58.45 ($z=0.616$) with the LOw Frequency ARray (LOFAR) at 120-168 MHz. This is one of the most distant radio halos discovered so far. The diffuse emission extends over $\sim$ 1 Mpc and has a morphology similar to that of the X-ray emission as revealed by XMM-Newton data. The halo is very faint at higher frequencies and is barely detected by follow-up 1-2 GHz Karl G.~Jansky Very Large Array (JVLA) observations, which enable us to constrain the radio spectral index to be $\alpha\leq 1.5-1.6$, i.e.; with properties between canonical and ultra-steep spectrum radio halos. Radio halos are currently explained as synchrotron radiation from relativistic electrons that are re-accelerated in the intra-cluster medium (ICM) by turbulence driven by energetic mergers. We show that in such a framework radio halos are expected to be relatively common at $\sim150$ MHz ($\sim30-60\%$) in clusters with mass and redshift similar to PSZ2 G099.86+58.45; however, at least 2/3 of these radio halos should have steep spectrum and thus be very faint above $\sim 1$ GHz frequencies. Furthermore, since the luminosity of radio halos at high redshift depends strongly on the magnetic field strength in the hosting clusters, future LOFAR observations will also provide vital information on the origin and amplification of magnetic fields in galaxy clusters., Comment: 6 pages, 3 figures, accepted (2019, July 17) for publication in ApJ Letter

Published
2019
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434. Revisiting the Fanaroff-Riley dichotomy and radio-galaxy morphology with the LOFAR Two-Metre Sky Survey (LoTSS)

Author

Mingo, B., Croston, J. H., Hardcastle, M. J., Best, P. N., Duncan, K. J., Morganti, R., Rottgering, H. J. A., Sabater, J., Shimwell, T. W., Williams, W. L., Brienza, M., Gurkan, G., Mahatma, V. H., Morabito, L. K., Prandoni, I., Bondi, M., Ineson, J., Mooney, S., Mingo, B., Croston, J. H., Hardcastle, M. J., Best, P. N., Duncan, K. J., Morganti, R., Rottgering, H. J. A., Sabater, J., Shimwell, T. W., Williams, W. L., Brienza, M., Gurkan, G., Mahatma, V. H., Morabito, L. K., Prandoni, I., Bondi, M., Ineson, J., and Mooney, S.

Abstract

The relative positions of the high and low surface brightness regions of radio-loud active galaxies in the 3CR sample were found by Fanaroff and Riley to be correlated with their luminosity. We revisit this canonical relationship with a sample of 5805 extended radio-loud AGN from the LOFAR Two-Metre Sky Survey (LoTSS), compiling the most complete dataset of radio-galaxy morphological information obtained to date. We demonstrate that, for this sample, radio luminosity does *not* reliably predict whether a source is edge-brightened (FRII) or centre-brightened (FRI). We highlight a large population of low-luminosity FRIIs, extending three orders of magnitude below the traditional FR break, and demonstrate that their host galaxies are on average systematically fainter than those of high-luminosity FRIIs and of FRIs matched in luminosity. This result supports the jet power/environment paradigm for the FR break: low-power jets may remain undisrupted and form hotspots in lower mass hosts. We also find substantial populations that appear physically distinct from the traditional FR classes, including candidate restarting sources and ``hybrids''. We identify 459 bent-tailed sources, which we find to have a significantly higher SDSS cluster association fraction (at $z<0.4$) than the general radio-galaxy population, similar to the results of previous work. The complexity of the LoTSS faint, extended radio sources demonstrates the need for caution in the automated classification and interpretation of extended sources in modern radio surveys, but also reveals the wealth of morphological information such surveys will provide and its value for advancing our physical understanding of radio-loud AGN., Comment: 21 pages, 4 tables, 16 Figures. Accepted for publication on Monthly Notices of the Royal Astronomical Society (MNRAS). Our LoTSS morphological catalogue containing classifications for 5805 extended radio-loud AGN is available from www.lofar-surveys.org/releases.html

Published
2019
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435. Growth and disruption in the Lyra complex

Author

Clavico, S., De Grandi, S., Ghizzardi, S., Rossetti, M., Molendi, S., Gastaldello, F., Girardi, M., Boschin, W., Botteon, A., Cassano, R., Bruggen, M., Brunetti, G., Dallacasa, D., Eckert, D., Ettori, S., Gaspari, M., Sereno, M., Shimwell, T., van Weeren, R. J., Clavico, S., De Grandi, S., Ghizzardi, S., Rossetti, M., Molendi, S., Gastaldello, F., Girardi, M., Boschin, W., Botteon, A., Cassano, R., Bruggen, M., Brunetti, G., Dallacasa, D., Eckert, D., Ettori, S., Gaspari, M., Sereno, M., Shimwell, T., and van Weeren, R. J.

Abstract

Nearby clusters of galaxies, z<0.1, are cosmic structures still under formation. Understanding the thermodynamic properties of merging clusters can provide crucial information on how they grow in the local universe. A detailed study of the intra-cluster medium (ICM) properties of un-relaxed systems is essential to understand the fate of in-falling structures and, more generally, the virialization process. We analyzed a mosaic of XMM-Newton observations (240 ks) of the Lyra system (z=0.067) that shows a complex dynamical state. We find the main cluster RXC J1825.3+3026 to be in a late merger phase, whereas its companion CIZA J1824.1+3029 is a relaxed cool-core cluster. We estimate a mass ratio of ~1:2 for the pair. No diffuse X-ray emission is found in the region between them, indicating that these clusters are in a pre-merger phase. We found evidence of a galaxy group infalling on RXC J1825.3+3026 in an advanced state of disruption. The Southern Galaxy, one of the brightest galaxies in the Lyra complex, was very likely at the center of the infalling group. This galaxy has a gaseous corona indicating that it was able to retain some of its gas after the ram-pressure stripping of the intra-group medium. In this scenario the diffuse emission excess observed southwest of RXC J1825.3+3026 could be due to gas once belonging to the group and/or to cluster ICM dislocated by the passage of the group. Finally, we identified three high-velocity galaxies aligned between RXC J1825.3+3026 and the SG, two of these showing evidence of gas stripped from them during infall. We estimate them to be currently falling onto the main cluster at an infall velocity of ~ 3000 km/s. Our study of the Lyra complex provides important clues about the processes presiding over the virialization of massive clusters in the local Universe., Comment: A&A accepted, 17 pages, 19 figures

Published
2019
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436. Signatures from a merging galaxy cluster and its AGN population: LOFAR observations of Abell 1682

Author

Clarke, A. O., Scaife, A. M. M., Shimwell, T., van Weeren, R. J., Bonafede, A., Heald, G., Brunetti, G., Cantwell, T. M., de Gasperin, F., Brüggen, M., Botteon, A., Hoeft, M., Horellou, C., Cassano, R., Harwood, J. J., Röttgering, H. J. A., Clarke, A. O., Scaife, A. M. M., Shimwell, T., van Weeren, R. J., Bonafede, A., Heald, G., Brunetti, G., Cantwell, T. M., de Gasperin, F., Brüggen, M., Botteon, A., Hoeft, M., Horellou, C., Cassano, R., Harwood, J. J., and Röttgering, H. J. A.

Abstract

We present LOFAR data from 110--180~MHz of the merging galaxy cluster Abell 1682, alongside archival optical, radio and X-ray data. Our 6 arc-second resolution images at low frequencies reveal new structures associated with numerous radio galaxies in the cluster. At 20 arc-second resolution we see diffuse emission throughout the cluster over hundreds of kpc, indicating particle acceleration mechanisms are in play as a result of the cluster merger event and powerful active galactic nuclei. We show that a significant part of the cluster emission is from an old radio galaxy with very steep spectrum emission (having a spectral index of $\alpha < -2.5$). Furthermore we identify a new region of diffuse steep spectrum emission ($\alpha < -1.1$) as a candidate for a radio halo which is co-spatial with the centre of the cluster merger. We suggest its origin as a population of old and mildly relativistic electrons left over from radio galaxies throughout the cluster which have been re-accelerated to higher energies by shocks and turbulence induced by the cluster merger event. We also note the discovery of six new giant radio galaxies in the vicinity of Abell 1682., Comment: Accepted in A&A; see journal version for uncompressed figures

Published
2019
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437. Scalability Model for the LOFAR Direction Independent Pipeline

Author

Mechev, A. P., Shimwell, T. W., Plaat, A., Intema, H., Varbanescu, A. L., Rottgering, H. J. A, Mechev, A. P., Shimwell, T. W., Plaat, A., Intema, H., Varbanescu, A. L., and Rottgering, H. J. A

Abstract

LOFAR is a leading aperture synthesis telescope operated in the Netherlands with stations across Europe. The LOFAR Two-meter Sky Survey (LoTSS) will produce more than 3000 14 TB data sets, mapping the entire northern sky at low frequencies. The data produced by this survey is important for understanding the formation and evolution of galaxies, supermassive black holes and other astronomical phenomena. All of the LoTSS data needs to be processed by the LOFAR Direction Independent (DI) pipeline, prefactor. Understanding the performance of this pipeline is important when trying to optimize the throughput for large projects, such as LoTSS and other deep surveys. Making a model of its completion time will enable us to predict the time taken to process large data sets, optimize our parameter choices, help schedule other LOFAR processing services, and predict processing time for future large radio telescopes. We tested the prefactor pipeline by scaling several parameters, notably number of CPUs, data size and size of calibration sky model. We present these results as a comprehensive model which will be used to predict processing time for a wide range of processing parameters. We also discover that smaller calibration models lead to significantly faster calibration times, while the calibration results do not significantly degrade in quality. Finally, we validate the model and compare predictions with production runs from the past six months, quantifying the performance penalties incurred by processing on a shared cluster. We conclude by noting the utility of the results and model for the LoTSS Survey, LOFAR as a whole and for other telescopes., Comment: 17 pages, 24 figures

Published
2019
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438. A Massive Cluster at z = 0.288 Caught in the Process of Formation: The Case of Abell 959

Author

Bîrzan, L., Rafferty, D. A., Cassano, R., Brunetti, G., van Weeren, R. J., Brüggen, M., Intema, H. T., de Gasperin, F., Andrade-Santos, F., Botteon, A., Röttgering, H. J. A., Shimwell, T. W., Bîrzan, L., Rafferty, D. A., Cassano, R., Brunetti, G., van Weeren, R. J., Brüggen, M., Intema, H. T., de Gasperin, F., Andrade-Santos, F., Botteon, A., Röttgering, H. J. A., and Shimwell, T. W.

Abstract

The largest galaxy clusters are observed still to be forming through major cluster-cluster mergers, often showing observational signatures such as radio relics and giant radio haloes. Using LOFAR Two-meter Sky Survey data, we present new detections of both a radio halo (with a spectral index of $\alpha_{143}^{1400}=1.48^{+0.06}_{-0.23}$) and a likely radio relic in Abell 959, a massive cluster at a redshift of z=0.288. Using a sample of clusters with giant radio haloes from the literature (80 in total), we show that the radio halo in A959 lies reasonably well on the scaling relations between the thermal and non-thermal power of the system. Additionally, we find evidence that steep-spectrum haloes tend to reside in clusters with high X-ray luminosities relative to those expected from cluster LM scaling relations, indicating that such systems may preferentially lie at an earlier stage of the merger, consistent with the theory that some steep-spectrum haloes result from low-turbulence mergers. Lastly, we find that halo systems containing radio relics tend to lie at lower X-ray luminosities, relative to those expected from cluster LM scaling relations, for a given halo radio power than those without relics, suggesting that the presence of relics indicates a later stage of the merger, in line with simulations., Comment: 17 pages, 5 figures, accepted for publication in MNRAS

Published
2019
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439. A single fast radio burst localized to a massive galaxy at cosmological distance

Author

Bannister, K. W., Deller, A. T., Phillips, C., Macquart, J. -P., Prochaska, J. X., Tejos, N., Ryder, S. D., Sadler, E. M., Shannon, R. M., Simha, S., Day, C. K., McQuinn, M., North-Hickey, F. O., Bhandari, S., Arcus, W. R., Bennert, V. N., Burchett, J., Bouwhuis, M., Dodson, R., Ekers, R. D., Farah, W., Flynn, C., James, C. W., Kerr, M., Lenc, E., Mahony, E. K., O'Meara, J., Osłowski, S., Qiu, H., Treu, T., U, V., Bateman, T. J., Bock, D. C. -J., Bolton, R. J., Brown, A., Bunton, J. D., Chippendale, A. P., Cooray, F. R., Cornwell, T., Gupta, N., Hayman, D. B., Kesteven, M., Koribalski, B. S., MacLeod, A., McClure-Griffiths, N. M., Neuhold, S., Norris, R. P., Pilawa, M. A., Qiao, R. -Y., Reynolds, J., Roxby, D. N., Shimwell, T. W., Voronkov, M. A., Wilson, C. D., Bannister, K. W., Deller, A. T., Phillips, C., Macquart, J. -P., Prochaska, J. X., Tejos, N., Ryder, S. D., Sadler, E. M., Shannon, R. M., Simha, S., Day, C. K., McQuinn, M., North-Hickey, F. O., Bhandari, S., Arcus, W. R., Bennert, V. N., Burchett, J., Bouwhuis, M., Dodson, R., Ekers, R. D., Farah, W., Flynn, C., James, C. W., Kerr, M., Lenc, E., Mahony, E. K., O'Meara, J., Osłowski, S., Qiu, H., Treu, T., U, V., Bateman, T. J., Bock, D. C. -J., Bolton, R. J., Brown, A., Bunton, J. D., Chippendale, A. P., Cooray, F. R., Cornwell, T., Gupta, N., Hayman, D. B., Kesteven, M., Koribalski, B. S., MacLeod, A., McClure-Griffiths, N. M., Neuhold, S., Norris, R. P., Pilawa, M. A., Qiao, R. -Y., Reynolds, J., Roxby, D. N., Shimwell, T. W., Voronkov, M. A., and Wilson, C. D.

Abstract

Fast Radio Bursts (FRBs) are brief radio emissions from distant astronomical sources. Some are known to repeat, but most are single bursts. Non-repeating FRB observations have had insufficient positional accuracy to localize them to an individual host galaxy. We report the interferometric localization of the single pulse FRB 180924 to a position 4 kpc from the center of a luminous galaxy at redshift 0.3214. The burst has not been observed to repeat. The properties of the burst and its host are markedly different from the only other accurately localized FRB source. The integrated electron column density along the line of sight closely matches models of the intergalactic medium, indicating that some FRBs are clean probes of the baryonic component of the cosmic web., Comment: Published online in Science 27 June 2019

Published
2019
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440. The intergalactic magnetic field probed by a giant radio galaxy

Author

O'Sullivan, S. P., Machalski, J., Van Eck, C. L., Heald, G., Brueggen, M., Fynbo, J. P. U., Heintz, K. E., Lara-Lopez, M. A., Vacca, V., Hardcastle, M. J., Shimwell, T. W., Tasse, C., Vazza, F., Andernach, H., Birkinshaw, M., Haverkorn, M., Horellou, C., Williams, W. L., Harwood, J. J., Brunetti, G., Anderson, J. M., Mao, S. A., Nikiel-Wroczynski, B., Takahashi, K., Carretti, E., Vernstrom, T., van Weeren, R. J., Orru, E., Morabito, L. K., Callingham, J. R., O'Sullivan, S. P., Machalski, J., Van Eck, C. L., Heald, G., Brueggen, M., Fynbo, J. P. U., Heintz, K. E., Lara-Lopez, M. A., Vacca, V., Hardcastle, M. J., Shimwell, T. W., Tasse, C., Vazza, F., Andernach, H., Birkinshaw, M., Haverkorn, M., Horellou, C., Williams, W. L., Harwood, J. J., Brunetti, G., Anderson, J. M., Mao, S. A., Nikiel-Wroczynski, B., Takahashi, K., Carretti, E., Vernstrom, T., van Weeren, R. J., Orru, E., Morabito, L. K., and Callingham, J. R.

Published
2019

441. Systematic effects in LOFAR data: A unified calibration strategy

Author

De Gasperin, F., Dijkema, T.J., Drabent, A., Mevius, M., Rafferty, D., Van Weeren, R., Brüggen, M., Callingham, J.R., Emig, K.L., Heald, G., Intema, Huib, Morabito, L.K., Offringa, A.R., Oonk, R., Orrù, E., Röttgering, H., Sabater, J., Shimwell, T., Shulevski, A., Williams, W., De Gasperin, F., Dijkema, T.J., Drabent, A., Mevius, M., Rafferty, D., Van Weeren, R., Brüggen, M., Callingham, J.R., Emig, K.L., Heald, G., Intema, Huib, Morabito, L.K., Offringa, A.R., Oonk, R., Orrù, E., Röttgering, H., Sabater, J., Shimwell, T., Shulevski, A., and Williams, W.

Abstract

Context. New generation low-frequency telescopes are exploring a new parameter space in terms of depth and resolution. The data taken with these interferometers, for example with the LOw Frequency ARray (LOFAR), are often calibrated in a low signal-to-noise ratio regime and the removal of critical systematic effects is challenging. The process requires an understanding of their origin and properties. Aim. In this paper we describe the major systematic effects inherent to next generation low-frequency telescopes, such as LOFAR. With this knowledge, we introduce a data processing pipeline that is able to isolate and correct these systematic effects. The pipeline will be used to calibrate calibrator observations as the first step of a full data reduction process. Methods. We processed two LOFAR observations of the calibrator 3C 196: the first using the Low Band Antenna (LBA) system at 42-66 MHz and the second using the High Band Antenna (HBA) system at 115-189 MHz. Results. We were able to isolate and correct for the effects of clock drift, polarisation misalignment, ionospheric delay, Faraday rotation, ionospheric scintillation, beam shape, and bandpass. The designed calibration strategy produced the deepest image to date at 54 MHz. The image has been used to confirm that the spectral energy distribution of the average radio source population tends to flatten at low frequencies. Conclusions. We prove that LOFAR systematic effects can be described by a relatively small number of parameters. Furthermore, the identification of these parameters is fundamental to reducing the degrees of freedom when the calibration is carried out on fields that are not dominated by a strong calibrator.

Published
2019

442. A LOFAR study of non-merging massive galaxy clusters

Author

Savini, F., Bonafede, A., Brüggen, M., Rafferty, D., Shimwell, T., Botteon, A., Brunetti, G., Intema, Huib, Wilber, A., Cassano, R., Vazza, F., Van Weeren, R., Cuciti, V., De Gasperin, F., Röttgering, H., Sommer, M., Bîrzan, L., Drabent, A., Savini, F., Bonafede, A., Brüggen, M., Rafferty, D., Shimwell, T., Botteon, A., Brunetti, G., Intema, Huib, Wilber, A., Cassano, R., Vazza, F., Van Weeren, R., Cuciti, V., De Gasperin, F., Röttgering, H., Sommer, M., Bîrzan, L., and Drabent, A.

Abstract

Centrally located diffuse radio emission has been observed in both merging and non-merging galaxy clusters. Depending on their morphology and size, we distinguish between giant radio haloes, which occur predominantly in merging clusters, and mini haloes, which are found in non-merging, cool-core clusters. In recent years, cluster-scale radio emission has also been observed in clusters with no sign of major mergers, showing that our knowledge of the mechanisms that lead to particle acceleration in the intra-cluster medium (ICM) is still incomplete. Low-frequency sensitive observations are required to assess whether the emission discovered in these few cases is common in galaxy clusters or not. With this aim, we carried out a campaign of observations with the LOw Frequency ARay (LOFAR) in the frequency range 120-168 MHz of nine massive clusters selected from the Planck SZ catalogue, which had no sign of major mergers. In this paper, we discuss the results of the observations that have led to the largest cluster sample studied within the LOFAR Two-metre Sky Survey, and we present Chandra X-ray data used to investigate the dynamical state of the clusters, verifying that the clusters are currently not undergoing major mergers, and to search for traces of minor or off-axis mergers. We discover large-scale steep-spectrum emission around mini haloes in the cool-core clusters PSZ1G139.61+24 and RXJ1720.1+2638, which is not observed around the mini halo in the non-cool-core cluster A1413. We also discover a new 570 kpc-halo in the non-cool-core cluster RXCJ0142.0+2131. We derived new upper limits to the radio power for clusters in which no diffuse radio emission was found, and we discuss the implication of our results to constrain the cosmic-ray energy budget in the ICM. We conclude that radio emission in non-merging massive clusters is not common at the sensitivity level reached by our observations and that no clear connection with the cluster dynamical state is observed. Ou

Published
2019

443. Planck 2015 results. I. Overview of products and scientific results

Author

Adam, R., Ade, P. A. R., Aghanim, N., Akrami, Y., Alves, M. I. R., Argueeso, F., Arnaud, M., Arroja, F., Ashdown, M., Aumont, J., Baccigalupi, C., Ballardini, M., Banday, A. J., Barreiro, R. B., Bartlett, J. G., Bartolo, N., Basak, S., Battaglia, P., Battaner, E., Battye, R., Benabed, K., Benoit, A., Benoit-Levy, A., Bernard, J. -P., Bersanelli, M., Bertincourt, B., Bielewicz, P., Bikmaev, I., Bock, J. J., Boehringer, H., Bonaldi, A., Bonavera, L., Bond, J. R., Borrill, J., Bouchet, F. R., Boulanger, F., Bucher, M., Burenin, R., Burigana, C., Butler, R. C., Calabrese, E., Cardoso, J. -F., Carvalho, P., Casaponsa, B., Castex, G., Catalano, A., Challinor, A., Chamballu, A., Chary, R. -R., Chiang, H. C., Chluba, J., Chon, G., Christensen, P. R., Church, S., Clemens, M., Clements, D. L., Colombi, S., Colombo, L. P. L., Combet, C., Comis, B., Contreras, D., Couchot, F., Coulais, A., Crill, B. P., Cruz, M., Curto, A., Cuttaia, F., Danese, L., Davies, R. D., Davis, R. J., Bernardis, P. de, Rosa, A. de, Zotti, G. de, Delabrouille, J., Delouis, J. -M., Desert, F. -X., Di Valentino, E., Dickinson, C., Diego, J. M., Dolag, K., Dole, H., Donzelli, S., Dore, O., Douspis, M., Ducout, A., Dunkley, J., Dupac, X., Efstathiou, G., Eisenhardt, P. R. M., Elsner, F., Ensslin, T. A., Eriksen, H. K., Falgarone, E., Fantaye, Y., Farhang, M., Feeney, S., Fergusson, J., Fernandez-Cobos, R., Feroz, F., Finelli, F., Florido, E., Forni, O., Frailis, M., Fraisse, A. A., Franceschet, C., Franceschi, E., Frejsel, A., Frolov, A., Galeotta, S., Galli, S., Ganga, K., Gauthier, C., Genova-Santos, R. T., Gerbino, M., Ghosh, T., Giard, M., Giraud-Heraud, Y., Giusarma, E., Gjerlow, E., Gonzalez-Nuevo, J., Gorski, K. M., Grainge, K. J. B., Gratton, S., Gregorio, A., Gruppuso, A., Gudmundsson, J. E., Hamann, J., Handley, W., Hansen, F. K., Hanson, D., Harrison, D. L., Heavens, A., Helou, G., Henrot-Versille, S., Hernandez-Monteagudo, C., Herranz, D., Hildebrandt, S. R., Hivon, E., Hobson, M., Holmes, W. A., Hornstrup, A., Hovest, W., Huang, Z., Huffenberger, K. M., Hurier, G., Ilic, S., Jaffe, A. H., Jaffe, T. R., Jin, T., Jones, W. C., Juvela, M., Karakci, A., Keihanen, E., Keskitalo, R., Khamitov, I., Kiiveri, K., Kim, J., Kisner, T. S., Kneissl, R., Knoche, J., Knox, L., Krachmalnicoff, N., Kunz, M., Kurki-Suonio, H., Lacasa, F. [UNESP], Lagache, G., Lahteenmaki, A., Lamarre, J. -M., Langer, M., Lasenby, A., Lattanzi, M., Lawrence, C. R., Le Jeune, M., Leahy, J. P., Lellouch, E., Leonardi, R., Leon-Tavares, J., Lesgourgues, J., Levrier, F., Lewis, A., Liguori, M., Lilje, P. B., Lilley, M., Linden-Vornle, M., Lindholm, V., Liu, H., Lopez-Caniego, M., Lubin, P. M., Ma, Y. -Z., Macias-Perez, J. F., Maggio, G., Maino, D., Mak, D. S. Y., Mandolesi, N., Mangilli, A., Marchini, A., Marcos-Caballero, A., Marinucci, D., Maris, M., Marshall, D. J., Martin, P. G., Martinelli, M., Martinez-Gonzalez, E., Masi, S., Matarrese, S., Mazzotta, P., McEwen, J. D., McGehee, P., Mei, S., Meinhold, P. R., Melchiorri, A., Melin, J. -B., Mendes, L., Mennella, A., Migliaccio, M., Mikkelsen, K., Millea, M., Mitra, S., Miville-Deschenes, M. -A., Molinari, D., Moneti, A., Montier, L., Moreno, R., Morgante, G., Mortlock, D., Moss, A., Mottet, S., Muenchmeyer, M., Munshi, D., Murphy, J. A., Narimani, A., Naselsky, P., Nastasi, A., Nati, F., Natoli, P., Negrello, M., Netterfield, C. B., Norgaard-Nielsen, H. U., Noviello, F., Novikov, D., Novikov, I., Olamaie, M., Oppermann, N., Orlando, E., Oxborrow, C. A., Paci, F., Pagano, L., Pajot, F., Paladini, R., Pandolfi, S., Paoletti, D., Partridge, B., Pasian, F., Patanchon, G., Pearson, T. J., Peel, M., Peiris, H. V., Pelkonen, V. -M., Perdereau, O., Perotto, L., Perrott, Y. C., Perrotta, F., Pettorino, V., Piacentini, F., Piat, M., Pierpaoli, E., Pietrobon, D., Plaszczynski, S., Pogosyan, D., Pointecouteau, E., Polenta, G., Popa, L., Pratt, G. W., Prezeau, G., Prunet, S., Puget, J. -L., Rachen, J. P., Racine, B., Reach, W. T., Rebolo, R., Reinecke, M., Remazeilles, M., Renault, C., Renzi, A., Ristorcelli, I., Rocha, G., Roman, M., Romelli, E., Rosset, C., Rossetti, M., Rotti, A., Roudier, G., d'Orfeuil, B. Rouille, Rowan-Robinson, M., Rubino-Martin, J. A., Ruiz-Granados, B., Rumsey, C., Rusholme, B., Said, N., Salvatelli, V., Salvati, L., Sandri, M., Sanghera, H. S., Santos, D., Saunders, R. D. E., Sauve, A., Savelainen, M., Savini, G., Schaefer, B. M., Schammel, M. P., Scott, D., Seiffert, M. D., Serra, P., Shellard, E. P. S., Shimwell, T. W., Shiraishi, M., Smith, K., Souradeep, T., Spencer, L. D., Spinelli, M., Stanford, S. A., Stern, D., Stolyarov, V., Stompor, R., Strong, A. W., Sudiwala, R., Sunyaev, R., Sutter, P., Sutton, D., Suur-Uski, A. -S., Sygnet, J. -F., Tauber, J. A., Tavagnacco, D., Terenzi, L., Texier, D., Toffolatti, L., Tomasi, M., Tornikoski, M., Tramonte, D., Tristram, M., Troja, A., Trombetti, T., Tucci, M., Tuovinen, J., Turler, M., Umana, G., Valenziano, L., Valiviita, J., Van Tent, F., Vassallo, T., Vibert, L., Vidal, M., Viel, M., Vielva, P., Villa, F., Wade, L. A., Walter, B., Wandelt, B. D., Watson, R., Wehus, I. K., Welikala, N., Weller, J., White, M., White, S. D. M., Wilkinson, A., Yvon, D., Zacchei, A., Zibin, J. P., Zonca, A., Planck Collaboration, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Hélium : du fondamental aux applications (HELFA), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CPT - E3 Cosmologie, Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Planck, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Hélium : du fondamental aux applications (NEEL - HELFA), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Théorique d'Orsay [Orsay] (LPT), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Adam, R., Ade, P. A. R., Aghanim, N., Akrami, Y., Alves, M. I. R., Arguëso, F., Arnaud, M., Arroja, F., Ashdown, M., Aumont, J., Baccigalupi, C., Ballardini, M., Banday, A. J., Barreiro, R. B., Bartlett, J. G., Bartolo, N., Basak, S., Battaglia, PAOLA MARIA, Battaner, E., Battye, R., Benabed, K., Benoît, A., Benoit Lévy, A., Bernard, J. P., Bersanelli, M., Bertincourt, B., Bielewicz, P., Bikmaev, I., Bock, J. J., Böhringer, H., Bonaldi, A., Bonavera, L., Bond, J. R., Borrill, J., Bouchet, F. R., Boulanger, F., Bucher, M., Burenin, R., Burigana, C., Butler, R. C., Calabrese, E., Cardoso, J. F., Carvalho, P., Casaponsa, B., Castex, G., Catalano, A., Challinor, A., Chamballu, A., Chary, R. R., Chiang, H. C., Chluba, J., Chon, G., Christensen, P. R., Church, S., Clemens, M., Clements, D. L., Colombi, S., Colombo, L. P. L., Combet, C., Comis, B., Contreras, D., Couchot, F., Coulais, A., Crill, B. P., Cruz, M., Curto, A., Cuttaia, F., Danese, L., Davies, R. D., Davis, R. J., De Bernardis, P., De Rosa, A., De Zotti, G., Delabrouille, J., Delouis, J. M., Désert, F. X., Di Valentino, E., Dickinson, C., Diego, J. M., Dolag, K., Dole, H., Donzelli, Simona, Doré, O., Douspis, M., Ducout, A., Dunkley, J., Dupac, X., Efstathiou, G., Eisenhardt, P. R. M., Elsner, F., Enßlin, T. A., Eriksen, H. K., Falgarone, E., Fantaye, Y., Farhang, M., Feeney, S., Fergusson, J., Fernandez Cobos, R., Feroz, F., Finelli, F., Florido, E., Forni, O., Frailis, M., Fraisse, A. A., Franceschet, C., Franceschi, E., Frejsel, A., Frolov, A., Galeotta, S., Galli, S., Ganga, K., Gauthier, C., Génova Santos, R. T., Gerbino, M., Ghosh, T., Giard, M., Giraud Héraud, Y., Giusarma, E., Gjerløw, E., González Nuevo, J., Górski, K. M., Grainge, K. J. B., Gratton, S., Gregorio, Anna, Gruppuso, A., Gudmundsson, J. E., Hamann, J., Handley, W., Hansen, F. K., Hanson, D., Harrison, D. L., Heavens, A., Helou, G., Henrot Versillé, S., Hernández Monteagudo, C., Herranz, D., Hildebrandt, S. R., Hivon, E., Hobson, M., Holmes, W. A., Hornstrup, A., Hovest, W., Huang, Z., Huffenberger, K. M., Hurier, G., Ilić, S., Jaffe, A. H., Jaffe, T. R., Jin, T., Jones, W. C., Juvela, M., Karakci, A., Keihänen, E., Keskitalo, R., Khamitov, I., Kiiveri, K., Kim, J., Kisner, T. S., Kneissl, R., Knoche, J., Knox, L., Krachmalnicoff, N., Kunz, M., Kurki Suonio, H., Lacasa, F., Lagache, G., Lähteenmäki, A., Lamarre, J. M., Langer, M., Lasenby, A., Lattanzi, M., Lawrence, C. R, Le Jeune, M., Leahy, J. P., Lellouch, E., Leonardi, R., León Tavares, J., Lesgourgues, J., Levrier, F., Lewis, A., Liguori, M., Lilje, P. B., Lilley, M., Linden Vørnle, M., Lindholm, V., Liu, H., López Caniego, M., Lubin, P. M., Ma, Y. Z., Maciás Pérez, J. F., Maggio, G., Maino, D., Mak, D. S. Y., Mandolesi, N., Mangilli, A., Marchini, A., Marcos Caballero, A., Marinucci, D., Maris, M., Marshall, D. J., Martin, P. G., Martinelli, M., Martínez González, E., Masi, S., Matarrese, S., Mazzotta, P., Mcewen, J. D., Mcgehee, P., Mei, S., Meinhold, P. R., Melchiorri, A., Melin, J. B., Mendes, L., Mennella, A., Migliaccio, M., Mikkelsen, K., Millea, M., Mitra, S., Miville Deschênes, M. A., Molinari, D., Moneti, A., Montier, L., Moreno, R., Morgante, G., Mortlock, D., Moss, A., Mottet, S., Münchmeyer, M., Munshi, D., Murphy, J. A., Narimani, A., Naselsky, P., Nastasi, A., Nati, F., Natoli, P., Negrello, M., Netterfield, C. B., Nørgaard Nielsen, H. U., Noviello, F., Novikov, D., Novikov, I., Olamaie, M., Oppermann, N., Orlando, Elena, Oxborrow, C. A., Paci, F., Pagano, L., Pajot, F., Paladini, R., Pandolfi, S., Paoletti, D., Partridge, B., Pasian, F., Patanchon, G., Pearson, T. J., Peel, M., Peiris, H. V., Pelkonen, V. M., Perdereau, O., Perotto, L., Perrott, Y. C., Perrotta, F., Pettorino, V., Piacentini, F., Piat, M., Pierpaoli, E., Pietrobon, D., Plaszczynski, S., Pogosyan, D., Pointecouteau, E., Polenta, G., Popa, L., Pratt, G. W., Prézeau, G., Prunet, S., Puget, J. L., Rachen, J. P., Racine, B., Reach, W. T., Rebolo, R., Reinecke, M., Remazeilles, M., Renault, C., Renzi, A., Ristorcelli, I., Rocha, G., Roman, M., Romelli, Erik, Rosset, C., Rossetti, M., Rotti, A., Roudier, G., Rouillé D'orfeuil, B., Rowan Robinson, M., Rubinõ Martín, J. A., Ruiz Granados, B., Rumsey, C., Rusholme, B., Said, N., Salvatelli, V., Salvati, L., Sandri, M., Sanghera, H. S., Santos, D., Saunders, R. D. E., Sauvé, A., Savelainen, M., Savini, G., Schaefer, B. M., Schammel, M. P., Scott, D., Seiffert, M. D., Serra, P., Shellard, E. P. S., Shimwell, T. W., Shiraishi, M., Smith, K., Souradeep, T., Spencer, L. D., Spinelli, M., Stanford, S. A., Stern, D., Stolyarov, V., Stompor, R., Strong, A. W., Sudiwala, R., Sunyaev, R., Sutter, P., Sutton, D., Suur Uski, A. S., Sygnet, J. F., Tauber, J. A., Tavagnacco, Daniele, Terenzi, L., Texier, D., Toffolatti, L., Tomasi, M., Tornikoski, M., Tramonte, D., Tristram, M., Troja, A., Trombetti, T., Tucci, M., Tuovinen, J., Türler, M., Umana, G., Valenziano, L., Valiviita, J., Van Tent, F., Vassallo, T., Vibert, L., Vidal, M., Viel, Matteo, Vielva, P., Villa, F., Wade, L. A., Walter, B., Wandelt, B. D., Watson, R., Wehus, I. K., Welikala, N., Weller, J., White, M., White, S. D. M., Wilkinson, A., Yvon, D., Zacchei, A., Zibin, J. P., Zonca, A., Universidade de São Paulo (USP), Aalto Univ, Dept Radio Sci & Engn, Acad Sci Tatarstan, African Inst Math Sci, Agenzia Spaziale Italiana Sci Data Ctr, Aix Marseille Univ, Univ Cam bridge, Univ KwaZulu Natal, ALMA Santiago Cent Off, CGEE, Univ Toronto, IRAP, Trinity Coll Dublin, CALTECH, Univ Cambridge, CEFCA, Lawrence Berkeley Natl Lab, CSIC, CEA Saclay, Tech Univ Denmark, Univ Geneva, Univ Copenhagen, Univ La Laguna ULL, Univ Oviedo, Univ Cantabria, Kazan Fed Univ, Radboud Univ Nijmegen, Univ British Columbia, Univ Southern Calif, Johns Hopkins Univ, UCL, Univ Sussex, Florida State Univ, Univ Helsinki, Princeton Univ, Univ Alberta, Univ Calif Berkeley, Univ Calif Davis, Univ Calif Santa Barbara, Univ Illinois, Univ Padua, Univ Bologna, Univ Ferrara, Univ Roma La Sapienza, Univ Milan, Univ Trieste, Univ Roma Tor Vergata, Niels Bohr Inst, ESO Vitacura, ESAC, ESTEC, Univ Turku, Observ Paris, INFN, HGSFP, Heidelberg Univ, Haverford Coll, Universidade Estadual Paulista (Unesp), INAF, IASF Bologna, IASF Milano, Univ Roma Sapienza, Natl Inst Nucl Phys, Univ Grenoble Alpes, CNRS, IUCAA, Imperial Coll London, Univ Joseph Fourier Grenoble I, Inst Univ France, Univ Paris Saclay, Inst Astrophys Paris, Rhein Westfal TH Aachen, Inst Space Sci, Univ Oslo, INAOE, Inst Astrofis Canarias, Ist Nazl Astrofis, Ist Nazl Fis Nucl, Univ Manchester, Univ Chicago, Kavli Inst Cosmol Cambridge, Univ Paris 11, Telecom ParisTech, Univ Paris Sud 11, Russian Acad Sci, Natl Taiwan Univ, Max Planck Inst Astrophys, Max Planck Inst Extraterr Phys, McGill Univ, Moscow Inst Phys & Technol, Univ Coll London, Natl Univ Ireland, Nicolaus Copernicus Astron Ctr, Nordita Nord Inst Theoret Phys, Perimeter Inst Theoret Phys, Shahid Beheshti Univ, SISSA, Univ E Campus, Cardiff Univ, Univ Nottingham, Simon Fraser Univ, UPMC, Stanford Univ, Sterrewacht Leiden, Univ Oxford, Univ Sydney, TUBITAK Natl Observ, Stockholm Univ, CERN, UPMC Univ Paris 06, Univ Toulouse, Stratospher Observ Infrared Astron, Ludwig Maximilian Univ Munich, Univ Granada, Univ Warsaw Observ, Science and Technology Facilities Council (STFC), Imperial College Trust, The Leverhulme Trust, Adam, R, Ade, P, Aghanim, N, Akrami, Y, Alves, M, Argueso, F, Arnaud, M, Arroja, F, Ashdown, M, Aumont, J, Baccigalupi, C, Ballardini, M, Banday, A, Barreiro, R, Bartlett, J, Bartolo, N, Basak, S, Battaglia, P, Battaner, E, Battye, R, Benabed, K, Benoit, A, Benoit-Levy, A, Bernard, J, Bersanelli, M, Bertincourt, B, Bielewicz, P, Bikmaev, I, Bock, J, Bohringer, H, Bonaldi, A, Bonavera, L, Bond, J, Borrill, J, Bouchet, F, Boulanger, F, Bucher, M, Burenin, R, Burigana, C, Butler, R, Calabrese, E, Cardoso, J, Carvalho, P, Casaponsa, B, Castex, G, Catalano, A, Challinor, A, Chamballu, A, Chary, R, Chiang, H, Chluba, J, Chon, G, Christensen, P, Church, S, Clemens, M, Clements, D, Colombi, S, Colombo, L, Combet, C, Comis, B, Contreras, D, Couchot, F, Coulais, A, Crill, B, Cruz, M, Curto, A, Cuttaia, F, Danese, L, Davies, R, Davis, R, De Bernardis, P, De Rosa, A, De Zotti, G, Delabrouille, J, Delouis, J, Desert, F, Di Valentino, E, Dickinson, C, Diego, J, Dolag, K, Dole, H, Donzelli, S, Dore, O, Douspis, M, Ducout, A, Dunkley, J, Dupac, X, Efstathiou, G, Eisenhardt, P, Elsner, F, Ensslin, T, Eriksen, H, Falgarone, E, Fantaye, Y, Farhang, M, Feeney, S, Fergusson, J, Fernandez-Cobos, R, Feroz, F, Finelli, F, Florido, E, Forni, O, Frailis, M, Fraisse, A, Franceschet, C, Franceschi, E, Frejsel, A, Frolov, A, Galeotta, S, Galli, S, Ganga, K, Gauthier, C, Genova-Santos, R, Gerbino, M, Ghosh, T, Giard, M, Giraud-Heraud, Y, Giusarma, E, Gjerlow, E, Gonzalez-Nuevo, J, Gorski, K, Grainge, K, Gratton, S, Gregorio, A, Gruppuso, A, Gudmundsson, J, Hamann, J, Handley, W, Hansen, F, Hanson, D, Harrison, D, Heavens, A, Helou, G, Henrot-Versille, S, Hernandez-Monteagudo, C, Herranz, D, Hildebrandt, S, Hivon, E, Hobson, M, Holmes, W, Hornstrup, A, Hovest, W, Huang, Z, Huffenberger, K, Hurier, G, Ilic, S, Jaffe, A, Jaffe, T, Jin, T, Jones, W, Juvela, M, Karakci, A, Keihanen, E, Keskitalo, R, Khamitov, I, Kiiveri, K, Kim, J, Kisner, T, Kneissl, R, Knoche, J, Knox, L, Krachmalnicoff, N, Kunz, M, Kurki-Suonio, H, Lacasa, F, Lagache, G, Lahteenmaki, A, Lamarre, J, Langer, M, Lasenby, A, Lattanzi, M, Lawrence, C, Le Jeune, M, Leahy, J, Lellouch, E, Leonardi, R, Leon-Tavares, J, Lesgourgues, J, Levrier, F, Lewis, A, Liguori, M, Lilje, P, Lilley, M, Linden-Vornle, M, Lindholm, V, Liu, H, Lopez-Caniego, M, Lubin, P, Ma, Y, Macias-Perez, J, Maggio, G, Maino, D, Mak, D, Mandolesi, N, Mangilli, A, Marchini, A, Marcos-Caballero, A, Marinucci, D, Maris, M, Marshall, D, Martin, P, Martinelli, M, Martinez-Gonzalez, E, Masi, S, Matarrese, S, Mazzotta, P, Mcewen, J, Mcgehee, P, Mei, S, Meinhold, P, Melchiorri, A, Melin, J, Mendes, L, Mennella, A, Migliaccio, M, Mikkelsen, K, Millea, M, Mitra, S, Miville-Deschenes, M, Molinari, D, Moneti, A, Montier, L, Moreno, R, Morgante, G, Mortlock, D, Moss, A, Mottet, S, Munchmeyer, M, Munshi, D, Murphy, J, Narimani, A, Naselsky, P, Nastasi, A, Nati, F, Natoli, P, Negrello, M, Netterfield, C, Norgaard-Nielsen, H, Noviello, F, Novikov, D, Novikov, I, Olamaie, M, Oppermann, N, Orlando, E, Oxborrow, C, Paci, F, Pagano, L, Pajot, F, Paladini, R, Pandolfi, S, Paoletti, D, Partridge, B, Pasian, F, Patanchon, G, Pearson, T, Peel, M, Peiris, H, Pelkonen, V, Perdereau, O, Perotto, L, Perrott, Y, Perrotta, F, Pettorino, V, Piacentini, F, Piat, M, Pierpaoli, E, Pietrobon, D, Plaszczynski, S, Pogosyan, D, Pointecouteau, E, Polenta, G, Popa, L, Pratt, G, Prezeau, G, Prunet, S, Puget, J, Rachen, J, Racine, B, Reach, W, Rebolo, R, Reinecke, M, Remazeilles, M, Renault, C, Renzi, A, Ristorcelli, I, Rocha, G, Roman, M, Romelli, E, Rosset, C, Rossetti, M, Rotti, A, Roudier, G, Rouille D'orfeuil, B, Rowan-Robinson, M, Rubino-Martin, J, Ruiz-Granados, B, Rumsey, C, Rusholme, B, Said, N, Salvatelli, V, Salvati, L, Sandri, M, Sanghera, H, Santos, D, Saunders, R, Sauve, A, Savelainen, M, Savini, G, Schaefer, B, Schammel, M, Scott, D, Seiffert, M, Serra, P, Shellard, E, Shimwell, T, Shiraishi, M, Smith, K, Souradeep, T, Spencer, L, Spinelli, M, Stanford, S, Stern, D, Stolyarov, V, Stompor, R, Strong, A, Sudiwala, R, Sunyaev, R, Sutter, P, Sutton, D, Suur-Uski, A, Sygnet, J, Tauber, J, Tavagnacco, D, Terenzi, L, Texier, D, Toffolatti, L, Tomasi, M, Tornikoski, M, Tramonte, D, Tristram, M, Troja, A, Trombetti, T, Tucci, M, Tuovinen, J, Turler, M, Umana, G, Valenziano, L, Valiviita, J, Van Tent, F, Vassallo, T, Vibert, L, Vidal, M, Viel, M, Vielva, P, Villa, F, Wade, L, Walter, B, Wandelt, B, Watson, R, Wehus, I, Welikala, N, Weller, J, White, M, White, S, Wilkinson, A, Yvon, D, Zacchei, A, Zibin, J, and Zonca, A

Subjects
error [data analysis method], Cosmology: observations – Cosmic background radiation – Surveys – Space vehicles: instruments – Instrumentation: detectors, gravitation: model, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astronomy, Cosmic microwave background, cosmic background radiation: polarization, Astrophysics, Surveys, Cosmic background radiation, Cosmology: observation, 01 natural sciences, Cosmology, cosmological model: parameter space, Space vehicles: instruments, Instrumentation: detectors, dark energy, Survey, observations [Cosmology], 010303 astronomy & astrophysics, detectors [Instrumentation], QB, media_common, Physics, Instrumentation: detector, data analysis method: error, Cosmology: observations, Astrophysics::Instrumentation and Methods for Astrophysics, Planck temperature, Polarization (waves), Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici, parameter space [cosmological model], non-Gaussianity, Sunyaev-Zel'dovich effect, astro-ph.CO, symbols, galaxy: cluster, detector [Instrumentation], Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics and Astronomy, power spectrum [cosmic background radiation], satellite: Planck, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::High Energy Astrophysical Phenomena, media_common.quotation_subject, FOS: Physical sciences, observation [Cosmology], Astrophysics::Cosmology and Extragalactic Astrophysics, Space vehicles: instrument, efficiency [data analysis method], Astronomy & Astrophysics, primordial [magnetic field], microwaves, NO, instruments [Space vehicles], [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], symbols.namesake, gravitation: lens, Settore FIS/05 - Astronomia e Astrofisica, data analysis method: efficiency, cluster [galaxy], 0103 physical sciences, instrument [Space vehicles], polarization [cosmic background radiation], lens [gravitation], cosmic background radiation: power spectrum, inflation, Planck, numerical calculations, Astrophysics::Galaxy Astrophysics, 010308 nuclear & particles physics, Astronomy and Astrophysics, Space and Planetary Science, temperature [cosmic background radiation], magnetic field: primordial, model [gravitation], Astronomy and Astrophysic, cosmic background radiation: temperature, 0201 Astronomical And Space Sciences, Gravitational lens, Sky, Dark energy, ddc:520, Planck [satellite], experimental results
Abstract

Planck is a project of the European Space Agency in cooperation with the scientific community, which started in 1993.SIC, MINECO, JA, and RES (Spain); ERC and PRACE (EU)., Adam, R., Ade, P.A.R., Aghanim, N., Akrami, Y., Alves, M.I.R., Arguëso, F., Arnaud, M., Arroja, F., Ashdown, M., Aumont, J., Baccigalupi, C., Ballardini, M., Banday, A.J., Barreiro, R.B., Bartlett, J.G., Bartolo, N., Basak, S., Battaglia, P., Battaner, E., Battye, R., Benabed, K., Benoît, A., Benoit-Lévy, A., Bernard, J.-P., Bersanelli, M., Bertincourt, B., Bielewicz, P., Bikmaev, I., Bock, J.J., Böhringer, H., Bonaldi, A., Bonavera, L., Bond, J.R., Borrill, J., Bouchet, F.R., Boulanger, F., Bucher, M., Burenin, R., Burigana, C., Butler, R.C., Calabrese, E., Cardoso, J.-F., Carvalho, P., Casaponsa, B., Castex, G., Catalano, A., Challinor, A., Chamballu, A., Chary, R.-R., Chiang, H.C., Chluba, J., Chon, G., Christensen, P.R., Church, S., Clemens, M., Clements, D.L., Colombi, S., Colombo, L.P.L., Combet, C., Comis, B., Contreras, D., Couchot, F., Coulais, A., Crill, B.P., Cruz, M., Curto, A., Cuttaia, F., Danese, L., Davies, R.D., Davis, R.J., De Bernardis, P., De Rosa, A., De Zotti, G., Delabrouille, J., Delouis, J.-M., Désert, F.-X., Di Valentino, E., Dickinson, C., Diego, J.M., Dolag, K., Dole, H., Donzelli, S., Doré, O., Douspis, M., Ducout, A., Dunkley, J., Dupac, X., Efstathiou, G., Eisenhardt, P.R.M., Elsner, F., Enßlin, T.A., Eriksen, H.K., Falgarone, E., Fantaye, Y., Farhang, M., Feeney, S., Fergusson, J., Fernandez-Cobos, R., Feroz, F., Finelli, F., Florido, E., Forni, O., Frailis, M., Fraisse, A.A., Franceschet, C., Franceschi, E., Frejsel, A., Frolov, A., Galeotta, S., Galli, S., Ganga, K., Gauthier, C., Génova-Santos, R.T., Gerbino, M., Ghosh, T., Giard, M., Giraud-Héraud, Y., Giusarma, E., Gjerløw, E., González-Nuevo, J., Górski, K.M., Grainge, K.J.B., Gratton, S., Gregorio, A., Gruppuso, A., Gudmundsson, J.E., Hamann, J., Handley, W., Hansen, F.K., Hanson, D., Harrison, D.L., Heavens, A., Helou, G., Henrot-Versillé, S., Hernández-Monteagudo, C., Herranz, D., Hildebrandt, S.R., Hivon, E., Hobson, M., Holmes, W.A., Hornstrup, A., Hovest, W., Huang, Z., Huffenberger, K.M., Hurier, G., Ilić, S., Jaffe, A.H., Jaffe, T.R., Jin, T., Jones, W.C., Juvela, M., Karakci, A., Keihänen, E., Keskitalo, R., Khamitov, I., Kiiveri, K., Kim, J., Kisner, T.S., Kneissl, R., Knoche, J., Knox, L., Krachmalnicoff, N., Kunz, M., Kurki-Suonio, H., Lacasa, F., Lagache, G., Lähteenmäki, A., Lamarre, J.-M., Langer, M., Lasenby, A., Lattanzi, M., Lawrence, C.R., Le Jeune, M., Leahy, J.P., Lellouch, E., Leonardi, R., León-Tavares, J., Lesgourgues, J., Levrier, F., Lewis, A., Liguori, M., Lilje, P.B., Lilley, M., Linden-Vørnle, M., Lindholm, V., Liu, H., López-Caniego, M., Lubin, P.M., Ma, Y.-Z., Maciás-Pérez, J.F., Maggio, G., Maino, D., Mak, D.S.Y., Mandolesi, N., Mangilli, A., Marchini, A., Marcos-Caballero, A., Marinucci, D., Maris, M., Marshall, D.J., Martin, P.G., Martinelli, M., Martínez-González, E., Masi, S., Matarrese, S., Mazzotta, P., Mcewen, J.D., Mcgehee, P., Mei, S., Meinhold, P.R., Melchiorri, A., Melin, J.-B., Mendes, L., Mennella, A., Migliaccio, M., Mikkelsen, K., Millea, M., Mitra, S., Miville-Deschênes, M.-A., Molinari, D., Moneti, A., Montier, L., Moreno, R., Morgante, G., Mortlock, D., Moss, A., Mottet, S., Münchmeyer, M., Munshi, D., Murphy, J.A., Narimani, A., Naselsky, P., Nastasi, A., Nati, F., Natoli, P., Negrello, M., Netterfield, C.B., Nørgaard-Nielsen, H.U., Noviello, F., Novikov, D., Novikov, I., Olamaie, M., Oppermann, N., Orlando, E., Oxborrow, C.A., Paci, F., Pagano, L., Pajot, F., Paladini, R., Pandolfi, S., Paoletti, D., Partridge, B., Pasian, F., Patanchon, G., Pearson, T.J., Peel, M., Peiris, H.V., Pelkonen, V.-M., Perdereau, O., Perotto, L., Perrott, Y.C., Perrotta, F., Pettorino, V., Piacentini, F., Piat, M., Pierpaoli, E., Pietrobon, D., Plaszczynski, S., Pogosyan, D., Pointecouteau, E., Polenta, G., Popa, L., Pratt, G.W., Prézeau, G., Prunet, S., Puget, J.-L., Rachen, J.P., Racine, B., Reach, W.T., Rebolo, R., Reinecke, M., Remazeilles, M., Renault, C., Renzi, A., Ristorcelli, I., Rocha, G., Roman, M., Romelli, E., Rosset, C., Rossetti, M., Rotti, A., Roudier, G., Rouillé D'orfeuil, B., Rowan-Robinson, M., Rubinõ-Martín, J.A., Ruiz-Granados, B., Rumsey, C., Rusholme, B., Said, N., Salvatelli, V., Salvati, L., Sandri, M., Sanghera, H.S., Santos, D., Saunders, R.D.E., Sauvé, A., Savelainen, M., Savini, G., Schaefer, B.M., Schammel, M.P., Scott, D., Seiffert, M.D., Serra, P., Shellard, E.P.S., Shimwell, T.W., Shiraishi, M., Smith, K., Souradeep, T., Spencer, L.D., Spinelli, M., Stanford, S.A., Stern, D., Stolyarov, V., Stompor, R., Strong, A.W., Sudiwala, R., Sunyaev, R., Sutter, P., Sutton, D., Suur-Uski, A.-S., Sygnet, J.-F., Tauber, J.A., Tavagnacco, D., Terenzi, L., Texier, D., Toffolatti, L., Tomasi, M., Tornikoski, M., Tramonte, D., Tristram, M., Troja, A., Trombetti, T., Tucci, M., Tuovinen, J., Türler, M., Umana, G., Valenziano, L., Valiviita, J., Van Tent, F., Vassallo, T., Vibert, L., Vidal, M., Viel, M., Vielva, P., Villa, F., Wade, L.A., Walter, B., Wandelt, B.D., Watson, R., Wehus, I.K., Welikala, N., Weller, J., White, M., White, S.D.M., Wilkinson, A., Yvon, D., Zacchei, A., Zibin, J.P., Zonca, A.

Published
2016
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444. ultra-steep diffuse radio emission observed in the cool-core cluster RX J1720.1+2638 with LOFAR at 54 MHz.

Author

Biava, N, de Gasperin, F, Bonafede, A, Edler, H W, Giacintucci, S, Mazzotta, P, Brunetti, G, Botteon, A, Brüggen, M, Cassano, R, Drabent, A, Edge, A C, Enßlin, T, Gastaldello, F, Riseley, C J, Rossetti, M, Rottgering, H J A, Shimwell, T W, Tasse, C, and van Weeren, R J

Subjects
PARTICLE acceleration, SMALL scale system, GALAXY clusters, POSITRONS, ELECTRONS
Abstract

Diffuse radio emission at the centre of galaxy clusters has been observed both in merging clusters on scales of Mpc, called giant radio haloes, and in relaxed systems with a cool-core on smaller scales, named mini haloes. Giant radio haloes and mini haloes are thought to be distinct classes of sources. However, recent observations have revealed the presence of diffuse radio emission on Mpc scales in clusters that do not show strong dynamical activity. RX J1720.1+2638 is a cool-core cluster, presenting both a bright central mini halo and a fainter diffuse, steep-spectrum emission extending beyond the cluster core that resembles giant radio halo emission. In this paper, we present new observations performed with the LOw Frequency ARray Low Band Antennas (LBA) at 54 MHz. These observations, combined with data at higher frequencies, allow us to constrain the spectral properties of the radio emission. The large-scale emission presents an ultrasteep spectrum with |$\alpha _{54}^{144}\sim 3.2$|⁠. The radio emission inside and outside the cluster core have strictly different properties, as there is a net change in spectral index and they follow different radio-X-ray surface brightness correlations. We argue that the large-scale diffuse emission is generated by particles re-acceleration after a minor merger. While for the central mini halo, we suggest that it could be generated by secondary electrons and positrons from hadronic interactions of relativistic nuclei with the dense cool-core gas, as an alternative to re-acceleration models. [ABSTRACT FROM AUTHOR]

Published
2021
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445. Planck 2015 results: XXVII. The second Planck catalogue of Sunyaev-Zeldovich sources

Author

Ade, P, Aghanim, N, Arnaud, M, Ashdown, M, Aumont, J, Baccigalupi, C, Banday, A, Barreiro, R, Barrena, R, Bartlett, J, Bartolo, N, Battaner, E, Battye, R, Benabed, K, Benoît, A, Benoit Lévy, A, Bernard, J, Bersanelli, M, Bielewicz, P, Bikmaev, I, Böhringer, H, Bonaldi, A, Bonavera, L, Bond, J, Borrill, J, Bouchet, F, Bucher, M, Burenin, R, Burigana, C, Butler, R, Calabrese, E, Cardoso, J, Carvalho, P, Catalano, A, Challinor, A, Chamballu, A, Chary, R, Chiang, H, Chon, G, Christensen, P, Clements, D, Colombi, S, Colombo, L, Combet, C, Comis, B, Couchot, F, Coulais, A, Crill, B, Curto, A, Cuttaia, F, Dahle, H, Danese, L, Davies, R, Davis, R, DE BERNARDIS, P, De Rosa, A, De Zotti, G, Delabrouille, J, Désert, F, Dickinson, C, Diego, J, Dolag, K, Dole, H, Donzelli, S, Doré, O, Douspis, M, Ducout, A, Dupac, X, Efstathiou, G, Eisenhardt, P, Elsner, F, Enßlin, T, Eriksen, H, Falgarone, E, Fergusson, J, Feroz, F, Ferragamo, A, Finelli, F, Forni, O, Frailis, M, Fraisse, A, Franceschi, E, Frejsel, A, Galeotta, S, Galli, S, Ganga, K, Génova Santos, R, Giard, M, Giraud Héraud, Y, Gjerløw, E, González Nuevo, J, Górski, K, Grainge, K, Gratton, S, Gregorio, A, Gruppuso, A, Gudmundsson, J, Hansen, F, Hanson, D, Harrison, D, Hempel, A, Henrot Versillé, S, Hernández Monteagudo, C, Herranz, D, Hildebrandt, S, Hivon, E, Hobson, M, Holmes, W, Hornstrup, A, Hovest, W, Huffenberger, K, Hurier, G, Jaffe, A, Jaffe, T, Jin, T, Jones, W, Juvela, M, Keihänen, E, Keskitalo, R, Khamitov, I, Kisner, T, Kneissl, R, Knoche, J, Kunz, M, Kurki Suonio, H, Lagache, G, Lamarre, J, Lasenby, A, Lattanzi, M, Lawrence, C, Leonardi, R, Lesgourgues, J, Levrier, F, Liguori, M, Lilje, P, Linden Vørnle, M, López Caniego, M, Lubin, P, Maciás Pérez, J, Maggio, G, Maino, D, Mak, D, Mandolesi, N, Mangilli, A, Martin, P, Martínez González, E, Masi, S, Matarrese, S, Mazzotta, P, Mcgehee, P, Mei, S, Melchiorri, A, Melin, J, Mendes, L, Mennella, A, Migliaccio, M, Mitra, S, Miville Deschênes, M, Moneti, A, Montier, L, Morgante, G, Mortlock, D, Moss, A, Munshi, D, Murphy, J, Naselsky, P, Nastasi, A, Nati, F, Natoli, P, Netterfield, C, Nørgaard Nielsen, H, Noviello, F, Novikov, D, Novikov, I, Olamaie, M, Oxborrow, C, Paci, F, Pagano, L, Pajot, F, Paoletti, D, Pasian, F, Patanchon, G, Pearson, T, Perdereau, O, Perotto, L, Perrott, Y, Perrotta, F, Pettorino, V, Piacentini, F, Piat, M, Pierpaoli, E, Pietrobon, D, Plaszczynski, S, Pointecouteau, E, Polenta, G, Pratt, G, Prézeau, G, Prunet, S, Puget, J, Rachen, J, Reach, W, Rebolo, R, Reinecke, M, Remazeilles, M, Renault, C, Renzi, A, Ristorcelli, I, Rocha, G, Rosset, C, Rossetti, M, Roudier, G, Rozo, E, Rubinõ Martín, J, Rumsey, C, Rusholme, B, Rykoff, E, Sandri, M, Santos, D, Saunders, R, Savelainen, M, Savini, G, Schammel, M, Scott, D, Seiffert, M, Shellard, E, Shimwell, T, Spencer, L, Stanford, S, Stern, D, Stolyarov, V, Stompor, R, Streblyanska, A, Sudiwala, R, Sunyaev, R, Sutton, D, Suur Uski, A, Sygnet, J, Tauber, J, Terenzi, L, Toffolatti, L, Tomasi, M, Tramonte, D, Tristram, M, Tucci, M, Tuovinen, J, Umana, G, Valenziano, L, Valiviita, J, Van Tent, B, Vielva, P, Villa, F, Wade, L, Wandelt, B, Wehus, I, White, S, Wright, E, Yvon, D, Zacchei, A, Zonca, A, Ade, P. A. R., Aghanim, N., Arnaud, M., Ashdown, M., Aumont, J., Baccigalupi, C., Banday, A. J., Barreiro, R. B., Barrena, R., Bartlett, J. G., Bartolo, N., Battaner, E., Battye, R., Benabed, K., Benoît, A., Benoit Lévy, A., Bernard, J. P., Bersanelli, M., Bielewicz, P., Bikmaev, I., Böhringer, H., Bonaldi, A., Bonavera, L., Bond, J. R., Borrill, J., Bouchet, F. R., Bucher, M., Burenin, R., Burigana, C., Butler, R. C., Calabrese, E., Cardoso, J. F., Carvalho, P., Catalano, A., Challinor, A., Chamballu, A., Chary, R. R., Chiang, H. C., Chon, G., Christensen, P. R., Clements, D. L., Colombi, S., Colombo, L. P. L., Combet, C., Comis, B., Couchot, F., Coulais, A., Crill, B. P., Curto, A., Cuttaia, F., Dahle, H., Danese, L., Davies, R. D., Davis, R. J., DE BERNARDIS, Paolo, De Rosa, A., De Zotti, G., Delabrouille, J., Désert, F. X., Dickinson, C., Diego, J. M., Dolag, K., Dole, H., Donzelli, S., Doré, O., Douspis, M., Ducout, A., Dupac, X., Efstathiou, G., Eisenhardt, P. R. M., Elsner, F., Enßlin, T. A., Eriksen, H. K., Falgarone, E., Fergusson, J., Feroz, F., Ferragamo, A., Finelli, F., Forni, O., Frailis, M., Fraisse, A. A., Franceschi, E., Frejsel, A., Galeotta, S., Galli, S., Ganga, K., Génova Santos, R. T., Giard, M., Giraud Héraud, Y., Gjerløw, E., González Nuevo, J., Górski, K. M., Grainge, K. J. B., Gratton, S., Gregorio, A., Gruppuso, A., Gudmundsson, J. E., Hansen, F. K., Hanson, D., Harrison, D. L., Hempel, A., Henrot Versillé, S., Hernández Monteagudo, C., Herranz, D., Hildebrandt, S. R., Hivon, E., Hobson, M., Holmes, W. A., Hornstrup, A., Hovest, W., Huffenberger, K. M., Hurier, G., Jaffe, A. H., Jaffe, T. R., Jin, T., Jones, W. C., Juvela, M., Keihänen, E., Keskitalo, R., Khamitov, I., Kisner, T. S., Kneissl, R., Knoche, J., Kunz, M., Kurki Suonio, H., Lagache, G., Lamarre, J. M., Lasenby, A., Lattanzi, M., Lawrence, C. R., Leonardi, R., Lesgourgues, J., Levrier, F., Liguori, M., Lilje, P. B., Linden Vørnle, M., López Caniego, M., Lubin, P. M., Maciás Pérez, J. F., Maggio, G., Maino, D., Mak, D. S. Y., Mandolesi, N., Mangilli, A., Martin, P. G., Martínez González, E., MASI, Silvia, Matarrese, S., Mazzotta, P., Mcgehee, P., Mei, S., MELCHIORRI, Alessandro, Melin, J. B., Mendes, L., Mennella, A., Migliaccio, M., Mitra, S., Miville Deschênes, M. A., Moneti, A., Montier, L., Morgante, G., Mortlock, D., Moss, A., Munshi, D., Murphy, J. A., Naselsky, P., Nastasi, A., NATI, FEDERICO, Natoli, P., Netterfield, C. B., Nørgaard Nielsen, H. U., Noviello, F., Novikov, D., Novikov, I., Olamaie, M., Oxborrow, C. A., Paci, F., Pagano, L., Pajot, F., Paoletti, D., Pasian, F., Patanchon, G., Pearson, T. J., Perdereau, O., Perotto, L., Perrott, Y. C., Perrotta, F., Pettorino, V., PIACENTINI, Francesco, Piat, M., Pierpaoli, E., Pietrobon, D., Plaszczynski, S., Pointecouteau, E., Polenta, G., Pratt, G. W., Prézeau, G., Prunet, S., Puget, J. L., Rachen, J. P., Reach, W. 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L., Yvon, D., Zacchei, A., Zonca, A., Ade, P, Aghanim, N, Arnaud, M, Ashdown, M, Aumont, J, Baccigalupi, C, Banday, A, Barreiro, R, Barrena, R, Bartlett, J, Bartolo, N, Battaner, E, Battye, R, Benabed, K, Benoît, A, Benoit Lévy, A, Bernard, J, Bersanelli, M, Bielewicz, P, Bikmaev, I, Böhringer, H, Bonaldi, A, Bonavera, L, Bond, J, Borrill, J, Bouchet, F, Bucher, M, Burenin, R, Burigana, C, Butler, R, Calabrese, E, Cardoso, J, Carvalho, P, Catalano, A, Challinor, A, Chamballu, A, Chary, R, Chiang, H, Chon, G, Christensen, P, Clements, D, Colombi, S, Colombo, L, Combet, C, Comis, B, Couchot, F, Coulais, A, Crill, B, Curto, A, Cuttaia, F, Dahle, H, Danese, L, Davies, R, Davis, R, DE BERNARDIS, P, De Rosa, A, De Zotti, G, Delabrouille, J, Désert, F, Dickinson, C, Diego, J, Dolag, K, Dole, H, Donzelli, S, Doré, O, Douspis, M, Ducout, A, Dupac, X, Efstathiou, G, Eisenhardt, P, Elsner, F, Enßlin, T, Eriksen, H, Falgarone, E, Fergusson, J, Feroz, F, Ferragamo, A, Finelli, F, Forni, O, Frailis, M, Fraisse, A, Franceschi, E, Frejsel, A, Galeotta, S, Galli, S, Ganga, K, Génova Santos, R, Giard, M, Giraud Héraud, Y, Gjerløw, E, González Nuevo, J, Górski, K, Grainge, K, Gratton, S, Gregorio, A, Gruppuso, A, Gudmundsson, J, Hansen, F, Hanson, D, Harrison, D, Hempel, A, Henrot Versillé, S, Hernández Monteagudo, C, Herranz, D, Hildebrandt, S, Hivon, E, Hobson, M, Holmes, W, Hornstrup, A, Hovest, W, Huffenberger, K, Hurier, G, Jaffe, A, Jaffe, T, Jin, T, Jones, W, Juvela, M, Keihänen, E, Keskitalo, R, Khamitov, I, Kisner, T, Kneissl, R, Knoche, J, Kunz, M, Kurki Suonio, H, Lagache, G, Lamarre, J, Lasenby, A, Lattanzi, M, Lawrence, C, Leonardi, R, Lesgourgues, J, Levrier, F, Liguori, M, Lilje, P, Linden Vørnle, M, López Caniego, M, Lubin, P, Maciás Pérez, J, Maggio, G, Maino, D, Mak, D, Mandolesi, N, Mangilli, A, Martin, P, Martínez González, E, Masi, S, Matarrese, S, Mazzotta, P, Mcgehee, P, Mei, S, Melchiorri, A, Melin, J, Mendes, L, Mennella, A, Migliaccio, M, Mitra, S, Miville Deschênes, M, Moneti, A, Montier, L, Morgante, G, Mortlock, D, Moss, A, Munshi, D, Murphy, J, Naselsky, P, Nastasi, A, Nati, F, Natoli, P, Netterfield, C, Nørgaard Nielsen, H, Noviello, F, Novikov, D, Novikov, I, Olamaie, M, Oxborrow, C, Paci, F, Pagano, L, Pajot, F, Paoletti, D, Pasian, F, Patanchon, G, Pearson, T, Perdereau, O, Perotto, L, Perrott, Y, Perrotta, F, Pettorino, V, Piacentini, F, Piat, M, Pierpaoli, E, Pietrobon, D, Plaszczynski, S, Pointecouteau, E, Polenta, G, Pratt, G, Prézeau, G, Prunet, S, Puget, J, Rachen, J, Reach, W, Rebolo, R, Reinecke, M, Remazeilles, M, Renault, C, Renzi, A, Ristorcelli, I, Rocha, G, Rosset, C, Rossetti, M, Roudier, G, Rozo, E, Rubinõ Martín, J, Rumsey, C, Rusholme, B, Rykoff, E, Sandri, M, Santos, D, Saunders, R, Savelainen, M, Savini, G, Schammel, M, Scott, D, Seiffert, M, Shellard, E, Shimwell, T, Spencer, L, Stanford, S, Stern, D, Stolyarov, V, Stompor, R, Streblyanska, A, Sudiwala, R, Sunyaev, R, Sutton, D, Suur Uski, A, Sygnet, J, Tauber, J, Terenzi, L, Toffolatti, L, Tomasi, M, Tramonte, D, Tristram, M, Tucci, M, Tuovinen, J, Umana, G, Valenziano, L, Valiviita, J, Van Tent, B, Vielva, P, Villa, F, Wade, L, Wandelt, B, Wehus, I, White, S, Wright, E, Yvon, D, Zacchei, A, Zonca, A, Ade, P. A. R., Aghanim, N., Arnaud, M., Ashdown, M., Aumont, J., Baccigalupi, C., Banday, A. J., Barreiro, R. B., Barrena, R., Bartlett, J. G., Bartolo, N., Battaner, E., Battye, R., Benabed, K., Benoît, A., Benoit Lévy, A., Bernard, J. P., Bersanelli, M., Bielewicz, P., Bikmaev, I., Böhringer, H., Bonaldi, A., Bonavera, L., Bond, J. R., Borrill, J., Bouchet, F. R., Bucher, M., Burenin, R., Burigana, C., Butler, R. C., Calabrese, E., Cardoso, J. F., Carvalho, P., Catalano, A., Challinor, A., Chamballu, A., Chary, R. R., Chiang, H. C., Chon, G., Christensen, P. R., Clements, D. L., Colombi, S., Colombo, L. P. L., Combet, C., Comis, B., Couchot, F., Coulais, A., Crill, B. P., Curto, A., Cuttaia, F., Dahle, H., Danese, L., Davies, R. D., Davis, R. J., DE BERNARDIS, Paolo, De Rosa, A., De Zotti, G., Delabrouille, J., Désert, F. X., Dickinson, C., Diego, J. M., Dolag, K., Dole, H., Donzelli, S., Doré, O., Douspis, M., Ducout, A., Dupac, X., Efstathiou, G., Eisenhardt, P. R. M., Elsner, F., Enßlin, T. A., Eriksen, H. K., Falgarone, E., Fergusson, J., Feroz, F., Ferragamo, A., Finelli, F., Forni, O., Frailis, M., Fraisse, A. A., Franceschi, E., Frejsel, A., Galeotta, S., Galli, S., Ganga, K., Génova Santos, R. T., Giard, M., Giraud Héraud, Y., Gjerløw, E., González Nuevo, J., Górski, K. M., Grainge, K. J. B., Gratton, S., Gregorio, A., Gruppuso, A., Gudmundsson, J. E., Hansen, F. K., Hanson, D., Harrison, D. L., Hempel, A., Henrot Versillé, S., Hernández Monteagudo, C., Herranz, D., Hildebrandt, S. R., Hivon, E., Hobson, M., Holmes, W. A., Hornstrup, A., Hovest, W., Huffenberger, K. M., Hurier, G., Jaffe, A. H., Jaffe, T. R., Jin, T., Jones, W. C., Juvela, M., Keihänen, E., Keskitalo, R., Khamitov, I., Kisner, T. S., Kneissl, R., Knoche, J., Kunz, M., Kurki Suonio, H., Lagache, G., Lamarre, J. M., Lasenby, A., Lattanzi, M., Lawrence, C. R., Leonardi, R., Lesgourgues, J., Levrier, F., Liguori, M., Lilje, P. B., Linden Vørnle, M., López Caniego, M., Lubin, P. M., Maciás Pérez, J. F., Maggio, G., Maino, D., Mak, D. S. Y., Mandolesi, N., Mangilli, A., Martin, P. G., Martínez González, E., MASI, Silvia, Matarrese, S., Mazzotta, P., Mcgehee, P., Mei, S., MELCHIORRI, Alessandro, Melin, J. B., Mendes, L., Mennella, A., Migliaccio, M., Mitra, S., Miville Deschênes, M. A., Moneti, A., Montier, L., Morgante, G., Mortlock, D., Moss, A., Munshi, D., Murphy, J. A., Naselsky, P., Nastasi, A., NATI, FEDERICO, Natoli, P., Netterfield, C. B., Nørgaard Nielsen, H. U., Noviello, F., Novikov, D., Novikov, I., Olamaie, M., Oxborrow, C. A., Paci, F., Pagano, L., Pajot, F., Paoletti, D., Pasian, F., Patanchon, G., Pearson, T. J., Perdereau, O., Perotto, L., Perrott, Y. C., Perrotta, F., Pettorino, V., PIACENTINI, Francesco, Piat, M., Pierpaoli, E., Pietrobon, D., Plaszczynski, S., Pointecouteau, E., Polenta, G., Pratt, G. W., Prézeau, G., Prunet, S., Puget, J. L., Rachen, J. P., Reach, W. T., Rebolo, R., Reinecke, M., Remazeilles, M., Renault, C., Renzi, A., Ristorcelli, I., Rocha, G., Rosset, C., Rossetti, M., Roudier, G., Rozo, E., Rubinõ Martín, J. A., Rumsey, C., Rusholme, B., Rykoff, E. S., Sandri, M., Santos, D., Saunders, R. D. E., Savelainen, M., Savini, G., Schammel, M. P., Scott, D., Seiffert, M. D., Shellard, E. P. S., Shimwell, T. W., Spencer, L. D., Stanford, S. A., Stern, D., Stolyarov, V., Stompor, R., Streblyanska, A., Sudiwala, R., Sunyaev, R., Sutton, D., Suur Uski, A. S., Sygnet, J. F., Tauber, J. A., Terenzi, L., Toffolatti, L., Tomasi, M., Tramonte, D., Tristram, M., Tucci, M., Tuovinen, J., Umana, G., Valenziano, L., Valiviita, J., Van Tent, B., Vielva, P., Villa, F., Wade, L. A., Wandelt, B. D., Wehus, I. K., White, S. D. M., Wright, E. L., Yvon, D., Zacchei, A., and Zonca, A.

Abstract

We present the all-sky Planck catalogue of Sunyaev-Zeldovich (SZ) sources detected from the 29 month full-mission data. The catalogue (PSZ2) is the largest SZ-selected sample of galaxy clusters yet produced and the deepest systematic all-sky surveyof galaxy clusters. It contains 1653 detections, of which 1203 are confirmed clusters with identified counterparts in external data sets, and is the first SZ-selected cluster survey containing >103 confirmed clusters. We present a detailed analysis of the survey selection function in terms of its completeness and statistical reliability, placing a lower limit of 83% on the purity. Using simulations, we find that the estimates of the SZ strength parameter Y5R500are robust to pressure-profile variation and beam systematics, but accurate conversion to Y500 requires the use of prior information on the cluster extent. We describe the multi-wavelength search for counterparts in ancillary data, which makes use of radio, microwave, infra-red, optical, and X-ray data sets, and which places emphasis on the robustness of the counterpart match. We discuss the physical properties of the new sample and identify a population of low-redshift X-ray under-luminous clusters revealed by SZ selection. These objects appear in optical and SZ surveys with consistent properties for their mass, but are almost absent from ROSAT X-ray selected samples.

Published
2016

446. Planck 2015 results: I. Overview of products and scientific results

Author

Adam, R, Ade, P, Aghanim, N, Akrami, Y, Alves, M, Argueso, F, Arnaud, M, Arroja, F, Ashdown, M, Aumont, J, Baccigalupi, C, Ballardini, M, Banday, A, Barreiro, R, Bartlett, J, Bartolo, N, Basak, S, Battaglia, P, Battaner, E, Battye, R, Benabed, K, Benoit, A, Benoit-Levy, A, Bernard, J, Bersanelli, M, Bertincourt, B, Bielewicz, P, Bikmaev, I, Bock, J, Bohringer, H, Bonaldi, A, Bonavera, L, Bond, J, Borrill, J, Bouchet, F, Boulanger, F, Bucher, M, Burenin, R, Burigana, C, Butler, R, Calabrese, E, Cardoso, J, Carvalho, P, Casaponsa, B, Castex, G, Catalano, A, Challinor, A, Chamballu, A, Chary, R, Chiang, H, Chluba, J, Chon, G, Christensen, P, Church, S, Clemens, M, Clements, D, Colombi, S, Colombo, L, Combet, C, Comis, B, Contreras, D, Couchot, F, Coulais, A, Crill, B, Cruz, M, Curto, A, Cuttaia, F, Danese, L, Davies, R, Davis, R, De Bernardis, P, De Rosa, A, De Zotti, G, Delabrouille, J, Delouis, J, Desert, F, Di Valentino, E, Dickinson, C, Diego, J, Dolag, K, Dole, H, Donzelli, S, Dore, O, Douspis, M, Ducout, A, Dunkley, J, Dupac, X, Efstathiou, G, Eisenhardt, P, Elsner, F, Ensslin, T, Eriksen, H, Falgarone, E, Fantaye, Y, Farhang, M, Feeney, S, Fergusson, J, Fernandez-Cobos, R, Feroz, F, Finelli, F, Florido, E, Forni, O, Frailis, M, Fraisse, A, Franceschet, C, Franceschi, E, Frejsel, A, Frolov, A, Galeotta, S, Galli, S, Ganga, K, Gauthier, C, Genova-Santos, R, Gerbino, M, Ghosh, T, Giard, M, Giraud-Heraud, Y, Giusarma, E, Gjerlow, E, Gonzalez-Nuevo, J, Gorski, K, Grainge, K, Gratton, S, Gregorio, A, Gruppuso, A, Gudmundsson, J, Hamann, J, Handley, W, Hansen, F, Hanson, D, Harrison, D, Heavens, A, Helou, G, Henrot-Versille, S, Hernandez-Monteagudo, C, Herranz, D, Hildebrandt, S, Hivon, E, Hobson, M, Holmes, W, Hornstrup, A, Hovest, W, Huang, Z, Huffenberger, K, Hurier, G, Ilic, S, Jaffe, A, Jaffe, T, Jin, T, Jones, W, Juvela, M, Karakci, A, Keihanen, E, Keskitalo, R, Khamitov, I, Kiiveri, K, Kim, J, Kisner, T, Kneissl, R, Knoche, J, Knox, L, Krachmalnicoff, N, Kunz, M, Kurki-Suonio, H, Lacasa, F, Lagache, G, Lahteenmaki, A, Lamarre, J, Langer, M, Lasenby, A, Lattanzi, M, Lawrence, C, Le Jeune, M, Leahy, J, Lellouch, E, Leonardi, R, Leon-Tavares, J, Lesgourgues, J, Levrier, F, Lewis, A, Liguori, M, Lilje, P, Lilley, M, Linden-Vornle, M, Lindholm, V, Liu, H, Lopez-Caniego, M, Lubin, P, Ma, Y, Macias-Perez, J, Maggio, G, Maino, D, Mak, D, Mandolesi, N, Mangilli, A, Marchini, A, Marcos-Caballero, A, Marinucci, D, Maris, M, Marshall, D, Martin, P, Martinelli, M, Martinez-Gonzalez, E, Masi, S, Matarrese, S, Mazzotta, P, Mcewen, J, Mcgehee, P, Mei, S, Meinhold, P, Melchiorri, A, Melin, J, Mendes, L, Mennella, A, Migliaccio, M, Mikkelsen, K, Millea, M, Mitra, S, Miville-Deschenes, M, Molinari, D, Moneti, A, Montier, L, Moreno, R, Morgante, G, Mortlock, D, Moss, A, Mottet, S, Munchmeyer, M, Munshi, D, Murphy, J, Narimani, A, Naselsky, P, Nastasi, A, Nati, F, Natoli, P, Negrello, M, Netterfield, C, Norgaard-Nielsen, H, Noviello, F, Novikov, D, Novikov, I, Olamaie, M, Oppermann, N, Orlando, E, Oxborrow, C, Paci, F, Pagano, L, Pajot, F, Paladini, R, Pandolfi, S, Paoletti, D, Partridge, B, Pasian, F, Patanchon, G, Pearson, T, Peel, M, Peiris, H, Pelkonen, V, Perdereau, O, Perotto, L, Perrott, Y, Perrotta, F, Pettorino, V, Piacentini, F, Piat, M, Pierpaoli, E, Pietrobon, D, Plaszczynski, S, Pogosyan, D, Pointecouteau, E, Polenta, G, Popa, L, Pratt, G, Prezeau, G, Prunet, S, Puget, J, Rachen, J, Racine, B, Reach, W, Rebolo, R, Reinecke, M, Remazeilles, M, Renault, C, Renzi, A, Ristorcelli, I, Rocha, G, Roman, M, Romelli, E, Rosset, C, Rossetti, M, Rotti, A, Roudier, G, Rouille D'orfeuil, B, Rowan-Robinson, M, Rubino-Martin, J, Ruiz-Granados, B, Rumsey, C, Rusholme, B, Said, N, Salvatelli, V, Salvati, L, Sandri, M, Sanghera, H, Santos, D, Saunders, R, Sauve, A, Savelainen, M, Savini, G, Schaefer, B, Schammel, M, Scott, D, Seiffert, M, Serra, P, Shellard, E, Shimwell, T, Shiraishi, M, Smith, K, Souradeep, T, Spencer, L, Spinelli, M, Stanford, S, Stern, D, Stolyarov, V, Stompor, R, Strong, A, Sudiwala, R, Sunyaev, R, Sutter, P, Sutton, D, Suur-Uski, A, Sygnet, J, Tauber, J, Tavagnacco, D, Terenzi, L, Texier, D, Toffolatti, L, Tomasi, M, Tornikoski, M, Tramonte, D, Tristram, M, Troja, A, Trombetti, T, Tucci, M, Tuovinen, J, Turler, M, Umana, G, Valenziano, L, Valiviita, J, Van Tent, F, Vassallo, T, Vibert, L, Vidal, M, Viel, M, Vielva, P, Villa, F, Wade, L, Walter, B, Wandelt, B, Watson, R, Wehus, I, Welikala, N, Weller, J, White, M, White, S, Wilkinson, A, Yvon, D, Zacchei, A, Zibin, J, Zonca, A, Adam R., Ade P. A. R., Aghanim N., Akrami Y., Alves M. I. R., Argueso F., Arnaud M., Arroja F., Ashdown M., Aumont J., Baccigalupi C., Ballardini M., Banday A. J., Barreiro R. B., Bartlett J. G., Bartolo N., Basak S., Battaglia P., Battaner E., Battye R., Benabed K., Benoit A., Benoit-Levy A., Bernard J. -P., Bersanelli M., Bertincourt B., Bielewicz P., Bikmaev I., Bock J. J., Bohringer H., Bonaldi A., Bonavera L., Bond J. R., Borrill J., Bouchet F. R., Boulanger F., Bucher M., Burenin R., Burigana C., Butler R. C., Calabrese E., Cardoso J. -F., Carvalho P., Casaponsa B., Castex G., Catalano A., Challinor A., Chamballu A., Chary R. -R., Chiang H. C., Chluba J., Chon G., Christensen P. R., Church S., Clemens M., Clements D. L., Colombi S., Colombo L. P. L., Combet C., Comis B., Contreras D., Couchot F., Coulais A., Crill B. P., Cruz M., Curto A., Cuttaia F., Danese L., Davies R. D., Davis R. J., De Bernardis P., De Rosa A., De Zotti G., Delabrouille J., Delouis J. -M., Desert F. -X., Di Valentino E., Dickinson C., Diego J. M., Dolag K., Dole H., Donzelli S., Dore O., Douspis M., Ducout A., Dunkley J., Dupac X., Efstathiou G., Eisenhardt P. R. M., Elsner F., Ensslin T. A., Eriksen H. K., Falgarone E., Fantaye Y., Farhang M., Feeney S., Fergusson J., Fernandez-Cobos R., Feroz F., Finelli F., Florido E., Forni O., Frailis M., Fraisse A. A., Franceschet C., Franceschi E., Frejsel A., Frolov A., Galeotta S., Galli S., Ganga K., Gauthier C., Genova-Santos R. T., Gerbino M., Ghosh T., Giard M., Giraud-Heraud Y., Giusarma E., Gjerlow E., Gonzalez-Nuevo J., Gorski K. M., Grainge K. J. B., Gratton S., Gregorio A., Gruppuso A., Gudmundsson J. E., Hamann J., Handley W., Hansen F. K., Hanson D., Harrison D. L., Heavens A., Helou G., Henrot-Versille S., Hernandez-Monteagudo C., Herranz D., Hildebrandt S. R., Hivon E., Hobson M., Holmes W. A., Hornstrup A., Hovest W., Huang Z., Huffenberger K. M., Hurier G., Ilic S., Jaffe A. H., Jaffe T. R., Jin T., Jones W. C., Juvela M., Karakci A., Keihanen E., Keskitalo R., Khamitov I., Kiiveri K., Kim J., Kisner T. S., Kneissl R., Knoche J., Knox L., Krachmalnicoff N., Kunz M., Kurki-Suonio H., Lacasa F., Lagache G., Lahteenmaki A., Lamarre J. -M., Langer M., Lasenby A., Lattanzi M., Lawrence C. R., Le Jeune M., Leahy J. P., Lellouch E., Leonardi R., Leon-Tavares J., Lesgourgues J., Levrier F., Lewis A., Liguori M., Lilje P. B., Lilley M., Linden-Vornle M., Lindholm V., Liu H., Lopez-Caniego M., Lubin P. M., Ma Y. -Z., Macias-Perez J. F., Maggio G., Maino D., Mak D. S. Y., Mandolesi N., Mangilli A., Marchini A., Marcos-Caballero A., Marinucci D., Maris M., Marshall D. J., Martin P. G., Martinelli M., Martinez-Gonzalez E., Masi S., Matarrese S., Mazzotta P., Mcewen J. D., Mcgehee P., Mei S., Meinhold P. R., Melchiorri A., Melin J. -B., Mendes L., Mennella A., Migliaccio M., Mikkelsen K., Millea M., Mitra S., Miville-Deschenes M. -A., Molinari D., Moneti A., Montier L., Moreno R., Morgante G., Mortlock D., Moss A., Mottet S., Munchmeyer M., Munshi D., Murphy J. A., Narimani A., Naselsky P., Nastasi A., Nati F., Natoli P., Negrello M., Netterfield C. B., Norgaard-Nielsen H. U., Noviello F., Novikov D., Novikov I., Olamaie M., Oppermann N., Orlando E., Oxborrow C. A., Paci F., Pagano L., Pajot F., Paladini R., Pandolfi S., Paoletti D., Partridge B., Pasian F., Patanchon G., Pearson T. J., Peel M., Peiris H. V., Pelkonen V. -M., Perdereau O., Perotto L., Perrott Y. C., Perrotta F., Pettorino V., Piacentini F., Piat M., Pierpaoli E., Pietrobon D., Plaszczynski S., Pogosyan D., Pointecouteau E., Polenta G., Popa L., Pratt G. W., Prezeau G., Prunet S., Puget J. -L., Rachen J. P., Racine B., Reach W. T., Rebolo R., Reinecke M., Remazeilles M., Renault C., Renzi A., Ristorcelli I., Rocha G., Roman M., Romelli E., Rosset C., Rossetti M., Rotti A., Roudier G., Rouille D'orfeuil B., Rowan-Robinson M., Rubino-Martin J. A., Ruiz-Granados B., Rumsey C., Rusholme B., Said N., Salvatelli V., Salvati L., Sandri M., Sanghera H. S., Santos D., Saunders R. D. E., Sauve A., Savelainen M., Savini G., Schaefer B. M., Schammel M. P., Scott D., Seiffert M. D., Serra P., Shellard E. P. S., Shimwell T. W., Shiraishi M., Smith K., Souradeep T., Spencer L. D., Spinelli M., Stanford S. A., Stern D., Stolyarov V., Stompor R., Strong A. W., Sudiwala R., Sunyaev R., Sutter P., Sutton D., Suur-Uski A. -S., Sygnet J. -F., Tauber J. A., Tavagnacco D., Terenzi L., Texier D., Toffolatti L., Tomasi M., Tornikoski M., Tramonte D., Tristram M., Troja A., Trombetti T., Tucci M., Tuovinen J., Turler M., Umana G., Valenziano L., Valiviita J., Van Tent F., Vassallo T., Vibert L., Vidal M., Viel M., Vielva P., Villa F., Wade L. A., Walter B., Wandelt B. D., Watson R., Wehus I. K., Welikala N., Weller J., White M., White S. D. M., Wilkinson A., Yvon D., Zacchei A., Zibin J. P., Zonca A., Adam, R, Ade, P, Aghanim, N, Akrami, Y, Alves, M, Argueso, F, Arnaud, M, Arroja, F, Ashdown, M, Aumont, J, Baccigalupi, C, Ballardini, M, Banday, A, Barreiro, R, Bartlett, J, Bartolo, N, Basak, S, Battaglia, P, Battaner, E, Battye, R, Benabed, K, Benoit, A, Benoit-Levy, A, Bernard, J, Bersanelli, M, Bertincourt, B, Bielewicz, P, Bikmaev, I, Bock, J, Bohringer, H, Bonaldi, A, Bonavera, L, Bond, J, Borrill, J, Bouchet, F, Boulanger, F, Bucher, M, Burenin, R, Burigana, C, Butler, R, Calabrese, E, Cardoso, J, Carvalho, P, Casaponsa, B, Castex, G, Catalano, A, Challinor, A, Chamballu, A, Chary, R, Chiang, H, Chluba, J, Chon, G, Christensen, P, Church, S, Clemens, M, Clements, D, Colombi, S, Colombo, L, Combet, C, Comis, B, Contreras, D, Couchot, F, Coulais, A, Crill, B, Cruz, M, Curto, A, Cuttaia, F, Danese, L, Davies, R, Davis, R, De Bernardis, P, De Rosa, A, De Zotti, G, Delabrouille, J, Delouis, J, Desert, F, Di Valentino, E, Dickinson, C, Diego, J, Dolag, K, Dole, H, Donzelli, S, Dore, O, Douspis, M, Ducout, A, Dunkley, J, Dupac, X, Efstathiou, G, Eisenhardt, P, Elsner, F, Ensslin, T, Eriksen, H, Falgarone, E, Fantaye, Y, Farhang, M, Feeney, S, Fergusson, J, Fernandez-Cobos, R, Feroz, F, Finelli, F, Florido, E, Forni, O, Frailis, M, Fraisse, A, Franceschet, C, Franceschi, E, Frejsel, A, Frolov, A, Galeotta, S, Galli, S, Ganga, K, Gauthier, C, Genova-Santos, R, Gerbino, M, Ghosh, T, Giard, M, Giraud-Heraud, Y, Giusarma, E, Gjerlow, E, Gonzalez-Nuevo, J, Gorski, K, Grainge, K, Gratton, S, Gregorio, A, Gruppuso, A, Gudmundsson, J, Hamann, J, Handley, W, Hansen, F, Hanson, D, Harrison, D, Heavens, A, Helou, G, Henrot-Versille, S, Hernandez-Monteagudo, C, Herranz, D, Hildebrandt, S, Hivon, E, Hobson, M, Holmes, W, Hornstrup, A, Hovest, W, Huang, Z, Huffenberger, K, Hurier, G, Ilic, S, Jaffe, A, Jaffe, T, Jin, T, Jones, W, Juvela, M, Karakci, A, Keihanen, E, Keskitalo, R, Khamitov, I, Kiiveri, K, Kim, J, Kisner, T, Kneissl, R, Knoche, J, Knox, L, Krachmalnicoff, N, Kunz, M, Kurki-Suonio, H, Lacasa, F, Lagache, G, Lahteenmaki, A, Lamarre, J, Langer, M, Lasenby, A, Lattanzi, M, Lawrence, C, Le Jeune, M, Leahy, J, Lellouch, E, Leonardi, R, Leon-Tavares, J, Lesgourgues, J, Levrier, F, Lewis, A, Liguori, M, Lilje, P, Lilley, M, Linden-Vornle, M, Lindholm, V, Liu, H, Lopez-Caniego, M, Lubin, P, Ma, Y, Macias-Perez, J, Maggio, G, Maino, D, Mak, D, Mandolesi, N, Mangilli, A, Marchini, A, Marcos-Caballero, A, Marinucci, D, Maris, M, Marshall, D, Martin, P, Martinelli, M, Martinez-Gonzalez, E, Masi, S, Matarrese, S, Mazzotta, P, Mcewen, J, Mcgehee, P, Mei, S, Meinhold, P, Melchiorri, A, Melin, J, Mendes, L, Mennella, A, Migliaccio, M, Mikkelsen, K, Millea, M, Mitra, S, Miville-Deschenes, M, Molinari, D, Moneti, A, Montier, L, Moreno, R, Morgante, G, Mortlock, D, Moss, A, Mottet, S, Munchmeyer, M, Munshi, D, Murphy, J, Narimani, A, Naselsky, P, Nastasi, A, Nati, F, Natoli, P, Negrello, M, Netterfield, C, Norgaard-Nielsen, H, Noviello, F, Novikov, D, Novikov, I, Olamaie, M, Oppermann, N, Orlando, E, Oxborrow, C, Paci, F, Pagano, L, Pajot, F, Paladini, R, Pandolfi, S, Paoletti, D, Partridge, B, Pasian, F, Patanchon, G, Pearson, T, Peel, M, Peiris, H, Pelkonen, V, Perdereau, O, Perotto, L, Perrott, Y, Perrotta, F, Pettorino, V, Piacentini, F, Piat, M, Pierpaoli, E, Pietrobon, D, Plaszczynski, S, Pogosyan, D, Pointecouteau, E, Polenta, G, Popa, L, Pratt, G, Prezeau, G, Prunet, S, Puget, J, Rachen, J, Racine, B, Reach, W, Rebolo, R, Reinecke, M, Remazeilles, M, Renault, C, Renzi, A, Ristorcelli, I, Rocha, G, Roman, M, Romelli, E, Rosset, C, Rossetti, M, Rotti, A, Roudier, G, Rouille D'orfeuil, B, Rowan-Robinson, M, Rubino-Martin, J, Ruiz-Granados, B, Rumsey, C, Rusholme, B, Said, N, Salvatelli, V, Salvati, L, Sandri, M, Sanghera, H, Santos, D, Saunders, R, Sauve, A, Savelainen, M, Savini, G, Schaefer, B, Schammel, M, Scott, D, Seiffert, M, Serra, P, Shellard, E, Shimwell, T, Shiraishi, M, Smith, K, Souradeep, T, Spencer, L, Spinelli, M, Stanford, S, Stern, D, Stolyarov, V, Stompor, R, Strong, A, Sudiwala, R, Sunyaev, R, Sutter, P, Sutton, D, Suur-Uski, A, Sygnet, J, Tauber, J, Tavagnacco, D, Terenzi, L, Texier, D, Toffolatti, L, Tomasi, M, Tornikoski, M, Tramonte, D, Tristram, M, Troja, A, Trombetti, T, Tucci, M, Tuovinen, J, Turler, M, Umana, G, Valenziano, L, Valiviita, J, Van Tent, F, Vassallo, T, Vibert, L, Vidal, M, Viel, M, Vielva, P, Villa, F, Wade, L, Walter, B, Wandelt, B, Watson, R, Wehus, I, Welikala, N, Weller, J, White, M, White, S, Wilkinson, A, Yvon, D, Zacchei, A, Zibin, J, Zonca, A, Adam R., Ade P. A. R., Aghanim N., Akrami Y., Alves M. I. R., Argueso F., Arnaud M., Arroja F., Ashdown M., Aumont J., Baccigalupi C., Ballardini M., Banday A. J., Barreiro R. B., Bartlett J. G., Bartolo N., Basak S., Battaglia P., Battaner E., Battye R., Benabed K., Benoit A., Benoit-Levy A., Bernard J. -P., Bersanelli M., Bertincourt B., Bielewicz P., Bikmaev I., Bock J. J., Bohringer H., Bonaldi A., Bonavera L., Bond J. R., Borrill J., Bouchet F. R., Boulanger F., Bucher M., Burenin R., Burigana C., Butler R. C., Calabrese E., Cardoso J. -F., Carvalho P., Casaponsa B., Castex G., Catalano A., Challinor A., Chamballu A., Chary R. -R., Chiang H. C., Chluba J., Chon G., Christensen P. R., Church S., Clemens M., Clements D. L., Colombi S., Colombo L. P. L., Combet C., Comis B., Contreras D., Couchot F., Coulais A., Crill B. P., Cruz M., Curto A., Cuttaia F., Danese L., Davies R. D., Davis R. J., De Bernardis P., De Rosa A., De Zotti G., Delabrouille J., Delouis J. -M., Desert F. -X., Di Valentino E., Dickinson C., Diego J. M., Dolag K., Dole H., Donzelli S., Dore O., Douspis M., Ducout A., Dunkley J., Dupac X., Efstathiou G., Eisenhardt P. R. M., Elsner F., Ensslin T. A., Eriksen H. K., Falgarone E., Fantaye Y., Farhang M., Feeney S., Fergusson J., Fernandez-Cobos R., Feroz F., Finelli F., Florido E., Forni O., Frailis M., Fraisse A. A., Franceschet C., Franceschi E., Frejsel A., Frolov A., Galeotta S., Galli S., Ganga K., Gauthier C., Genova-Santos R. T., Gerbino M., Ghosh T., Giard M., Giraud-Heraud Y., Giusarma E., Gjerlow E., Gonzalez-Nuevo J., Gorski K. M., Grainge K. J. B., Gratton S., Gregorio A., Gruppuso A., Gudmundsson J. E., Hamann J., Handley W., Hansen F. K., Hanson D., Harrison D. L., Heavens A., Helou G., Henrot-Versille S., Hernandez-Monteagudo C., Herranz D., Hildebrandt S. R., Hivon E., Hobson M., Holmes W. A., Hornstrup A., Hovest W., Huang Z., Huffenberger K. M., Hurier G., Ilic S., Jaffe A. H., Jaffe T. R., Jin T., Jones W. C., Juvela M., Karakci A., Keihanen E., Keskitalo R., Khamitov I., Kiiveri K., Kim J., Kisner T. S., Kneissl R., Knoche J., Knox L., Krachmalnicoff N., Kunz M., Kurki-Suonio H., Lacasa F., Lagache G., Lahteenmaki A., Lamarre J. -M., Langer M., Lasenby A., Lattanzi M., Lawrence C. R., Le Jeune M., Leahy J. P., Lellouch E., Leonardi R., Leon-Tavares J., Lesgourgues J., Levrier F., Lewis A., Liguori M., Lilje P. B., Lilley M., Linden-Vornle M., Lindholm V., Liu H., Lopez-Caniego M., Lubin P. M., Ma Y. -Z., Macias-Perez J. F., Maggio G., Maino D., Mak D. S. Y., Mandolesi N., Mangilli A., Marchini A., Marcos-Caballero A., Marinucci D., Maris M., Marshall D. J., Martin P. G., Martinelli M., Martinez-Gonzalez E., Masi S., Matarrese S., Mazzotta P., Mcewen J. D., Mcgehee P., Mei S., Meinhold P. R., Melchiorri A., Melin J. -B., Mendes L., Mennella A., Migliaccio M., Mikkelsen K., Millea M., Mitra S., Miville-Deschenes M. -A., Molinari D., Moneti A., Montier L., Moreno R., Morgante G., Mortlock D., Moss A., Mottet S., Munchmeyer M., Munshi D., Murphy J. A., Narimani A., Naselsky P., Nastasi A., Nati F., Natoli P., Negrello M., Netterfield C. B., Norgaard-Nielsen H. U., Noviello F., Novikov D., Novikov I., Olamaie M., Oppermann N., Orlando E., Oxborrow C. A., Paci F., Pagano L., Pajot F., Paladini R., Pandolfi S., Paoletti D., Partridge B., Pasian F., Patanchon G., Pearson T. J., Peel M., Peiris H. V., Pelkonen V. -M., Perdereau O., Perotto L., Perrott Y. C., Perrotta F., Pettorino V., Piacentini F., Piat M., Pierpaoli E., Pietrobon D., Plaszczynski S., Pogosyan D., Pointecouteau E., Polenta G., Popa L., Pratt G. W., Prezeau G., Prunet S., Puget J. -L., Rachen J. P., Racine B., Reach W. T., Rebolo R., Reinecke M., Remazeilles M., Renault C., Renzi A., Ristorcelli I., Rocha G., Roman M., Romelli E., Rosset C., Rossetti M., Rotti A., Roudier G., Rouille D'orfeuil B., Rowan-Robinson M., Rubino-Martin J. A., Ruiz-Granados B., Rumsey C., Rusholme B., Said N., Salvatelli V., Salvati L., Sandri M., Sanghera H. S., Santos D., Saunders R. D. E., Sauve A., Savelainen M., Savini G., Schaefer B. M., Schammel M. P., Scott D., Seiffert M. D., Serra P., Shellard E. P. S., Shimwell T. W., Shiraishi M., Smith K., Souradeep T., Spencer L. D., Spinelli M., Stanford S. A., Stern D., Stolyarov V., Stompor R., Strong A. W., Sudiwala R., Sunyaev R., Sutter P., Sutton D., Suur-Uski A. -S., Sygnet J. -F., Tauber J. A., Tavagnacco D., Terenzi L., Texier D., Toffolatti L., Tomasi M., Tornikoski M., Tramonte D., Tristram M., Troja A., Trombetti T., Tucci M., Tuovinen J., Turler M., Umana G., Valenziano L., Valiviita J., Van Tent F., Vassallo T., Vibert L., Vidal M., Viel M., Vielva P., Villa F., Wade L. A., Walter B., Wandelt B. D., Watson R., Wehus I. K., Welikala N., Weller J., White M., White S. D. M., Wilkinson A., Yvon D., Zacchei A., Zibin J. P., and Zonca A.

Abstract

The European Space Agency's Planck satellite, which is dedicated to studying the early Universe and its subsequent evolution, was launched on 14 May 2009. It scanned the microwave and submillimetre sky continuously between 12 August 2009 and 23 October 2013. In February 2015, ESA and the Planck Collaboration released the second set of cosmology products based ondata from the entire Planck mission, including both temperature and polarization, along with a set of scientific and technical papers and a web-based explanatory supplement. This paper gives an overview of the main characteristics of the data and the data products in the release, as well as the associated cosmological and astrophysical science results and papers. The data products include maps of the cosmic microwave background (CMB), the thermal Sunyaev-Zeldovich effect, diffuse foregrounds in temperature and polarization, catalogues of compact Galactic and extragalactic sources (including separate catalogues of Sunyaev-Zeldovich clusters and Galactic cold clumps), and extensive simulations of signals and noise used in assessing uncertainties and the performance of the analysis methods. The likelihood code used to assess cosmological models against the Planck data is described, along with a CMB lensing likelihood. Scientific results include cosmological parameters derived from CMB power spectra, gravitational lensing, and cluster counts, as well as constraints on inflation, non-Gaussianity, primordial magnetic fields, dark energy, and modified gravity, and new results on low-frequency Galactic foregrounds.

Published
2016

447. The LOFAR Two-metre Sky Survey (LoTSS) III. First Data Release: optical/IR identifications and value-added catalogue

Author

Williams, W. L., Hardcastle, M. J., Best, P. N., Sabater, J., Croston, J. H., Duncan, K. J., Shimwell, T. W., Röttgering, H. J. A., Nisbet, D., Gürkan, G., Alegre, L., Cochrane, R. K., Goyal, A., Hale, C. L., Jackson, N., Jamrozy, M., Kondapally, R., Kunert-Bajraszewska, M., Mahatma, V. H., Mingo, B., Morabito, L. K., Prandoni, I., Roskowinski, C., Shulevski, A., Smith, D. J. B., Tasse, C., Urquhart, S., Webster, B., White, G. J., Beswick, R. J., Callingham, J. R., Chyży, K. T., de Gasperin, F., Harwood, J. J., Hoeft, M., Iacobelli, M., McKean, J. P., Mechev, A. P., Miley, G. K., Schwarz, D. J., and van Weeren, R. J.

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The LOFAR Two-metre Sky Survey (LoTSS) is an ongoing sensitive, high-resolution 120-168 MHz survey of the Northern sky with diverse and ambitious science goals. Many of the scientific objectives of LoTSS rely upon, or are enhanced by, the association or separation of the sometimes incorrectly catalogued radio components into distinct radio sources, and the identification and characterisation of the optical counterparts to these sources. Here we present the source associations and optical and/or IR identifications for sources in the first data release, which are made using a combination of statistical techniques and visual association and identification. We document in detail the colour- and magnitude-dependent likelihood ratio method used for statistical identification as well as the Zooniverse project, called LOFAR Galaxy Zoo, used for the visual classification. We describe the process used to select which of these two different methods is most appropriate for each LoTSS source. The final LoTSS-DR1-IDs value-added catalogue presented contains 318,520 radio sources, of which 231,716 (73%) have optical and/or IR identifications in Pan-STARRS and WISE. The value-added catalogue is available online at https://lofar-surveys.org/, as part of this data release., Comment: 8 figures, 5 tables and 23 pages. This paper is part of the LOFAR surveys data release 1 and has been accepted for publication in a special edition of A&A that will appear in Feb 2019, volume 622. The catalogues and images from the data release will be publicly available at https://lofar-surveys.org/ upon publication in the journal

Published
2018
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448. Growth and disruption in the Lyra complex

Author

Clavico, S., primary, De Grandi, S., additional, Ghizzardi, S., additional, Rossetti, M., additional, Molendi, S., additional, Gastaldello, F., additional, Girardi, M., additional, Boschin, W., additional, Botteon, A., additional, Cassano, R., additional, Brüggen, M., additional, Brunetti, G., additional, Dallacasa, D., additional, Eckert, D., additional, Ettori, S., additional, Gaspari, M., additional, Sereno, M., additional, Shimwell, T., additional, and van Weeren, R. J., additional

Published
2019
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449. A LOFAR-IRAS cross-match study: the far-infrared radio correlation and the 150 MHz luminosity as a star-formation rate tracer

Author

Wang, L., primary, Gao, F., additional, Duncan, K. J., additional, Williams, W. L., additional, Rowan-Robinson, M., additional, Sabater, J., additional, Shimwell, T. W., additional, Bonato, M., additional, Calistro-Rivera, G., additional, Chyży, K. T., additional, Farrah, D., additional, Gürkan, G., additional, Hardcastle, M. J., additional, McCheyne, I., additional, Prandoni, I., additional, Read, S. C., additional, Röttgering, H. J. A., additional, and Smith, D. J. B., additional

Published
2019
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450. LOFAR early-time search for coherent radio emission from GRB 180706A

Author

Rowlinson, A, primary, Gourdji, K, additional, van der Meulen, K, additional, Meyers, Z S, additional, Shimwell, T W, additional, ter Veen, S, additional, Wijers, R A M J, additional, Kuiack, M J, additional, Shulevski, A, additional, Broderick, J W, additional, van der Horst, A J, additional, Tasse, C, additional, Hardcastle, M J, additional, Mechev, A P, additional, and Williams, W L, additional

Published
2019
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