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Your search keyword '"Clarke, T. E."' showing total 15 results
Start Over Author "Clarke, T. E." Journal monthly notices of the royal astronomical society
15 results on '"Clarke, T. E."'

1. Sardinia Radio Telescope observations of the Coma cluster

Author

Murgia, M, primary, Govoni, F, additional, Vacca, V, additional, Loi, F, additional, Feretti, L, additional, Giovannini, G, additional, Melis, A, additional, Concu, R, additional, Carretti, E, additional, Poppi, S, additional, Valente, G, additional, Bernardi, G, additional, Bonafede, A, additional, Boschin, W, additional, Brienza, M, additional, Clarke, T E, additional, de Gasperin, F, additional, Enßlin, T A, additional, Ferrari, C, additional, Gastaldello, F, additional, Girardi, M, additional, Gregorini, L, additional, Johnston-Hollitt, M, additional, Orrù, E, additional, Parma, P, additional, Perley, R A, additional, Taylor, G B, additional, and Marchegiani, P, additional

Published
2024
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3. MeerKAT Galaxy Clusters Legacy Survey: star formation in massive clusters at 0.15 < z < 0.35.

Author

Kesebonye, K C, Hilton, M, Knowles, K, Cotton, W D, Clarke, T E, Loubser, S I, Moodley, K, and Sikhosana, S P

Subjects
STAR formation, SUPERGIANT stars, MEERKAT, DARK energy, GALAXY clusters, MERGERS & acquisitions
Abstract

We investigate dust-unbiased star formation rates (SFRs) as a function of the environment in 20 massive clusters (⁠|$M_{200}\gt 4\times 10^{14}\, {\rm M}_{\odot }$|⁠) between 0.15 < |$z$| < 0.35 using radio luminosities (L 1.4GHz) from the recently released MeerKAT Galaxy Cluster Legacy Survey catalogue. We use optical data from the Dark Energy Camera Legacy Survey to estimate photo- |$z$| s and assign cluster membership. We observe a steady decline in the fraction (f SF) of star-forming galaxies from 2 R 200 to the cluster centres in our full cluster sample, but notice a significant difference in f SF gradients between clusters hosting large-scale extended radio emission in the form of haloes and relics (associated with ongoing merger activity) and non-radio-halo/relic hosting clusters. For star-forming galaxies within R 200, the f SF in clusters hosting radio haloes and relics (0.148 ± 0.016) is |$\approx 23{{\ \rm per\ cent}}$| higher than in non-radio-halo/relic hosting clusters (0.120 ± 0.011). We observe a 3σ difference between the total SFR normalized by cluster mass for non-radio-halo/relic hosting clusters (21.5 ± 1.9 M⊙yr−1/1014M⊙) and for clusters with radio haloes and relics (26.1 ± 1.4 M⊙yr−1/1014M⊙). There is a ≈4× decline in the mass normalized total SFR of clusters for galaxies with SFR above the luminous infrared galaxies (LIRGs) SFR limit at our redshift slice, corresponding to 2 Gyr in lookback time. This is consistent with the rapid decline in SF activity with decreasing redshift amongst cluster LIRGs seen by previous studies using infrared-derived SFR. [ABSTRACT FROM AUTHOR]

Published
2023
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4. A Spitzer survey of Deep Drilling Fields to be targeted by the Vera C. Rubin Observatory Legacy Survey of Space and Time

Author

Lacy, M, primary, Surace, J A, additional, Farrah, D, additional, Nyland, K, additional, Afonso, J, additional, Brandt, W N, additional, Clements, D L, additional, Lagos, C D P, additional, Maraston, C, additional, Pforr, J, additional, Sajina, A, additional, Sako, M, additional, Vaccari, M, additional, Wilson, G, additional, Ballantyne, D R, additional, Barkhouse, W A, additional, Brunner, R, additional, Cane, R, additional, Clarke, T E, additional, Cooper, M, additional, Cooray, A, additional, Covone, G, additional, D’Andrea, C, additional, Evrard, A E, additional, Ferguson, H C, additional, Frieman, J, additional, Gonzalez-Perez, V, additional, Gupta, R, additional, Hatziminaoglou, E, additional, Huang, J, additional, Jagannathan, P, additional, Jarvis, M J, additional, Jones, K M, additional, Kimball, A, additional, Lidman, C, additional, Lubin, L, additional, Marchetti, L, additional, Martini, P, additional, McMahon, R G, additional, Mei, S, additional, Messias, H, additional, Murphy, E J, additional, Newman, J A, additional, Nichol, R, additional, Norris, R P, additional, Oliver, S, additional, Perez-Fournon, I, additional, Peters, W M, additional, Pierre, M, additional, Polisensky, E, additional, Richards, G T, additional, Ridgway, S E, additional, Röttgering, H J A, additional, Seymour, N, additional, Shirley, R, additional, Somerville, R, additional, Strauss, M A, additional, Suntzeff, N, additional, Thorman, P A, additional, van Kampen, E, additional, Verma, A, additional, Wechsler, R, additional, and Wood-Vasey, W M, additional

Published
2020
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5. High-resolution VLA low radio frequency observations of the Perseus cluster: radio lobes, mini-halo, and bent-jet radio galaxies

Author

Gendron-Marsolais, M, primary, Hlavacek-Larrondo, J, additional, van Weeren, R J, additional, Rudnick, L, additional, Clarke, T E, additional, Sebastian, B, additional, Mroczkowski, T, additional, Fabian, A C, additional, Blundell, K M, additional, Sheldahl, E, additional, Nyland, K, additional, Sanders, J S, additional, Peters, W M, additional, and Intema, H T, additional

Published
2020
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7. A Spitzer survey of Deep Drilling Fields to be targeted by the Vera C. Rubin Observatory Legacy Survey of Space and Time.

Author

Lacy, M, Surace, J A, Farrah, D, Nyland, K, Afonso, J, Brandt, W N, Clements, D L, Lagos, C D P, Maraston, C, Pforr, J, Sajina, A, Sako, M, Vaccari, M, Wilson, G, Ballantyne, D R, Barkhouse, W A, Brunner, R, Cane, R, Clarke, T E, and Cooper, M

Subjects
ACTIVE galactic nuclei, INFRARED cameras, SPACE telescopes, GALAXY formation, OBSERVATORIES
Abstract

The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will observe several Deep Drilling Fields (DDFs) to a greater depth and with a more rapid cadence than the main survey. In this paper, we describe the 'DeepDrill' survey, which used the Spitzer Space Telescope Infrared Array Camera (IRAC) to observe three of the four currently defined DDFs in two bands, centred on 3.6 and 4.5 μ m. These observations expand the area that was covered by an earlier set of observations in these three fields by the Spitzer Extragalactic Representative Volume Survey (SERVS). The combined DeepDrill and SERVS data cover the footprints of the LSST DDFs in the Extended Chandra Deep Field–South (ECDFS) field, the ELAIS-S1 field (ES1), and the XMM -Large-Scale Structure Survey field (XMM -LSS). The observations reach an approximate 5σ point-source depth of 2  μ Jy (corresponding to an AB magnitude of 23.1; sufficient to detect a 10 |$^{11} \, \mathrm{M}_{\odot}$| galaxy out to z ≈ 5) in each of the two bands over a total area of |$\approx 29\,$| deg2. The dual-band catalogues contain a total of 2.35 million sources. In this paper, we describe the observations and data products from the survey, and an overview of the properties of galaxies in the survey. We compare the source counts to predictions from the Shark semi-analytic model of galaxy formation. We also identify a population of sources with extremely red ([3.6]−[4.5] >1.2) colours which we show mostly consists of highly obscured active galactic nuclei. [ABSTRACT FROM AUTHOR]

Published
2021
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8. Observations of a nearby filament of galaxy clusters with the Sardinia Radio Telescope

Author

Vacca, V, primary, Murgia, M, additional, Govoni, F, additional, Loi, F, additional, Vazza, F, additional, Finoguenov, A, additional, Carretti, E, additional, Feretti, L, additional, Giovannini, G, additional, Concu, R, additional, Melis, A, additional, Gheller, C, additional, Paladino, R, additional, Poppi, S, additional, Valente, G, additional, Bernardi, G, additional, Boschin, W, additional, Brienza, M, additional, Clarke, T E, additional, Colafrancesco, S, additional, Enßlin, T A, additional, Ferrari, C, additional, de Gasperin, F, additional, Gastaldello, F, additional, Girardi, M, additional, Gregorini, L, additional, Johnston-Hollitt, M, additional, Junklewitz, H, additional, Orrù, E, additional, Parma, P, additional, Perley, R, additional, and Taylor, G B, additional

Published
2018
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9. Observations of the galaxy cluster CIZA J2242.8+5301 with the Sardinia Radio Telescope

Author

Loi, F., primary, Murgia, M., additional, Govoni, F., additional, Vacca, V., additional, Feretti, L., additional, Giovannini, G., additional, Carretti, E., additional, Gastaldello, F., additional, Girardi, M., additional, Vazza, F., additional, Concu, R., additional, Melis, A., additional, Paladino, R., additional, Poppi, S., additional, Valente, G., additional, Boschin, W., additional, Clarke, T. E., additional, Colafrancesco, S., additional, Enßlin, T., additional, Ferrari, C., additional, de Gasperin, F., additional, Gregorini, L., additional, Johnston-Hollitt, M., additional, Junklewitz, H., additional, Orrù, E., additional, Parma, P., additional, Perley, R., additional, and Taylor, G. B., additional

Published
2017
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10. Far-ultraviolet morphology of star-forming filaments in cool core brightest cluster galaxies

Author

Tremblay, G. R., primary, O'Dea, C. P., additional, Baum, S. A., additional, Mittal, R., additional, McDonald, M. A., additional, Combes, F., additional, Li, Y., additional, McNamara, B. R., additional, Bremer, M. N., additional, Clarke, T. E., additional, Donahue, M., additional, Edge, A. C., additional, Fabian, A. C., additional, Hamer, S. L., additional, Hogan, M. T., additional, Oonk, J. B. R., additional, Quillen, A. C., additional, Sanders, J. S., additional, Salomé, P., additional, and Voit, G. M., additional

Published
2015
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12. A multiwavelength view of cooling versus AGN heating in the X-ray luminous cool-core of Abell 3581★

Author

Canning, R. E. A., primary, Sun, M., additional, Sanders, J. S., additional, Clarke, T. E., additional, Fabian, A. C., additional, Giacintucci, S., additional, Lal, D. V., additional, Werner, N., additional, Allen, S. W., additional, Donahue, M., additional, Edge, A. C., additional, Johnstone, R. M., additional, Nulsen, P. E. J., additional, Salomé, P., additional, and Sarazin, C. L., additional

Published
2013
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13. Residual cooling and persistent star formation amid active galactic nucleus feedback in Abell 2597

Author

Tremblay, G. R., primary, O’Dea, C. P., additional, Baum, S. A., additional, Clarke, T. E., additional, Sarazin, C. L., additional, Bregman, J. N., additional, Combes, F., additional, Donahue, M., additional, Edge, A. C., additional, Fabian, A. C., additional, Ferland, G. J., additional, McNamara, B. R., additional, Mittal, R., additional, Oonk, J. B. R., additional, Quillen, A. C., additional, Russell, H. R., additional, Sanders, J. S., additional, Salomé, P., additional, Voit, G. M., additional, Wilman, R. J., additional, and Wise, M. W., additional

Published
2012
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14. Multiphase signatures of active galactic nucleus feedback in Abell 2597

Author

Tremblay, G. R., primary, O’Dea, C. P., additional, Baum, S. A., additional, Clarke, T. E., additional, Sarazin, C. L., additional, Bregman, J. N., additional, Combes, F., additional, Donahue, M., additional, Edge, A. C., additional, Fabian, A. C., additional, Ferland, G. J., additional, McNamara, B. R., additional, Mittal, R., additional, Oonk, J. B. R., additional, Quillen, A. C., additional, Russell, H. R., additional, Sanders, J. S., additional, Salomé, P., additional, Voit, G. M., additional, Wilman, R. J., additional, and Wise, M. W., additional

Published
2012
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15. Observations of a nearby filament of galaxy clusters with the Sardinia Radio Telescope

Author

F. de Gasperin, Rosita Paladino, Matteo Murgia, Claudio Gheller, Tracy E. Clarke, Gianni Bernardi, Emanuela Orrú, Sergio Poppi, Gabriele Giovannini, V. Vacca, Luigina Feretti, G. B. Taylor, Melanie Johnston-Hollitt, L. Gregorini, Federica Govoni, Franco Vazza, Chiara Ferrari, M. Brienza, Fabio Gastaldello, H. Junklewitz, Marisa Girardi, Alexis Finoguenov, Raimondo Concu, Richard A. Perley, Ettore Carretti, G. Valente, Torsten A. Enßlin, Walter Boschin, Andrea Melis, P. Parma, F. Loi, S. Colafrancesco, Department of Physics, Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Vacca, V, Murgia, M, Govoni, F, Loi, F, Vazza, F, Finoguenov, A, Carretti, E, Feretti, L, Giovannini, G, Concu, R, Melis, A, Gheller, C, Paladino, R, Poppi, S, Valente, G, Bernardi, G, Boschin, W, Brienza, M, Clarke, T E, Colafrancesco, S, Enßlin, T A, Ferrari, C, de Gasperin, F, Gastaldello, F, Girardi, M, Gregorini, L, Johnston-Hollitt, M, Junklewitz, H, Orrù, E, Parma, P, Perley, R, Taylor, G B, DIP. DI ASTRONOMIA, DIP. DI DISCIPLINE GIURIDICHE DELL'ECONOMIA E DELL'AZIENDA, DIPARTIMENTO DI FISICA E ASTRONOMIA 'AUGUSTO RIGHI', Facolta' di SCIENZE MATEMATICHE FISICHE e NATURALI, Da definire, AREA MIN. 02 - Scienze fisiche, Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), and De gasperin, F

Subjects
Radio galaxy, magnetic field, magnetic fields, 01 natural sciences, VLA SKY SURVEY, 010303 astronomy & astrophysics, acceleration of particle, SCALE, media_common, acceleration of particles, Physics, BARYONS, galaxies: clusters: intracluster medium, cosmology: observations, large-scale structure of Universe, clusters: intracluster medium [galaxies], LOW-FREQUENCY, large-scale structure of Universe, Astrophysics - Cosmology and Nongalactic Astrophysics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, observations, large-scale structure of Universe [cosmology], Astrophysics::Cosmology and Extragalactic Astrophysics, Low frequency, MAGNETIC-FIELDS, COSMIC FILAMENTS, Radio telescope, 0103 physical sciences, Galaxy cluster, Astrophysics::Galaxy Astrophysics, NRAO VLA Sky Survey, SPECTRUM, 010308 nuclear & particles physics, Astronomy, Astronomy and Astrophysics, 115 Astronomy, Space science, Astrophysics - Astrophysics of Galaxies, Galaxy, EVOLUTION, acceleration of particles, magnetic fields, galaxies: clusters: intracluster medium, cosmology: observations, large-scale structure of Universe, Radio halo, Space and Planetary Science, Sky, Astrophysics of Galaxies (astro-ph.GA), cosmology: observations, galaxies: clusters medium, ABELL, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], EMISSION
Abstract

We report the detection of diffuse radio emission which might be connected to a large-scale filament of the cosmic web covering a 8deg x 8deg area in the sky, likely associated with a z~0.1 over-density traced by nine massive galaxy clusters. In this work, we present radio observations of this region taken with the Sardinia Radio Telescope. Two of the clusters in the field host a powerful radio halo sustained by violent ongoing mergers and provide direct proof of intra-cluster magnetic fields. In order to investigate the presence of large-scale diffuse radio synchrotron emission in and beyond the galaxy clusters in this complex system, we combined the data taken at 1.4 GHz obtained with the Sardinia Radio Telescope with higher resolution data taken with the NRAO VLA Sky Survey. We found 28 candidate new sources with a size larger and X-ray emission fainter than known diffuse large-scale synchrotron cluster sources for a given radio power. This new population is potentially the tip of the iceberg of a class of diffuse large-scale synchrotron sources associated with the filaments of the cosmic web. In addition, we found in the field a candidate new giant radio galaxy., 35 pages, 30 figures, MNRAS Accepted, A high-resolution version of the paper can be found at the link http://erg.oa-cagliari.inaf.it/preprints/paper_filament.pdf

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