Search

Your search keyword '"H. R. Kloeckner"' showing total 6 results
Start Over Author "H. R. Kloeckner"
6 results on '"H. R. Kloeckner"'

1. The VLA-COSMOS 3 GHz Large Project: Continuum data and source catalog release

Author

Shrinivas R. Kulkarni, Kunal Mooley, Julie Banfield, G. Zamorani, Mark Sargent, Frank Bertoldi, Sarah K. Leslie, Stephen Bourke, Eric J. Murphy, N. Baran, F. Navarrete, Eva Schinnerer, H. J. McCracken, Mladen Novak, Ivan Delvecchio, J. Delhaize, Alexander Karim, E. Middleberg, Vibor Jelić, Peter Capak, Gregg Hallinan, Dale A. Frail, Clotilde Laigle, Eleni Vardoulaki, Heng Hao, Mislav Baloković, Chris Carilli, H. R. Kloeckner, Nick Scoville, J. Krpan, Huib Intema, O. Ilbert, Kartik Sheth, Steven T. Myers, Paolo Ciliegi, M. Bondi, Vernesa Smolčić, Oskari Miettinen, Assaf Horesh, N. Herrera Ruiz, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), and Astronomy

Subjects
ACTIVE GALACTIC NUCLEI, Spectral shape analysis, PRIRODNE ZNANOSTI. Fizika. Astronomija i astrofizika, Monte Carlo method, AZTEC MILLIMETER SURVEY, FOS: Physical sciences, Astrophysics, 01 natural sciences, Jansky, 0103 physical sciences, LARGE-SCALE STRUCTURE, RADIO SPECTRAL INDEX, NATURAL SCIENCES. Physics. Astronomy and Astrophysics, atalogs, cosmology: observations, radio continuum: galaxies, Source counts, 010303 astronomy & astrophysics, Very Long Baseline Array, QB, Physics, LEGACY SURVEY, Spectral index, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, 20 CM, POINT-SOURCE CATALOG, PHOENIX DEEP SURVEY, Astronomy and Astrophysics, Astrometry, STAR-FORMATION HISTORY, Astrophysics - Astrophysics of Galaxies, observations [cosmology], galaxies [radio continuum], Square degree, SOURCE POPULATION, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), catalogs
Abstract

We present the VLA-COSMOS 3 GHz Large Project based on 384 hours of observations with the Karl G. Jansky Very Large Array (VLA) at 3 GHz (10 cm) toward the two square degree Cosmic Evolution Survey (COSMOS) field. The final mosaic reaches a median rms of 2.3 uJy/beam over the two square degrees at an angular resolution of 0.75". To fully account for the spectral shape and resolution variations across the broad (2 GHz) band, we image all data with a multiscale, multifrequency synthesis algorithm. We present a catalog of 10,830 radio sources down to 5 sigma, out of which 67 are combined from multiple components. Comparing the positions of our 3 GHz sources with those from the Very Long Baseline Array (VLBA)-COSMOS survey, we estimate that the astrometry is accurate to 0.01" at the bright end (signal-to-noise ratio, S/N_3GHz > 20). Survival analysis on our data combined with the VLA-COSMOS 1.4~GHz Joint Project catalog yields an expected median radio spectral index of alpha=-0.7. We compute completeness corrections via Monte Carlo simulations to derive the corrected 3 GHz source counts. Our counts are in agreement with previously derived 3 GHz counts based on single-pointing (0.087 square degrees) VLA data. In summary, the VLA-COSMOS 3 GHz Large Project simultaneously provides the largest and deepest radio continuum survey at high (0.75") angular resolution to date, bridging the gap between last-generation and next-generation surveys., 19 pages, 18 figures, 5 tables, accepted for publication in A&A

Published
2017

2. Multiple supermassive black hole systems: SKA’s future leading role

Author

I. Heywood, Sándor Frey, Roger Deane, H. R. Kloeckner, M. Coriat, Zsolt Paragi, Matt J. Jarvis, and Gianni Bernardi

Subjects
Gravitation, Gravitational wave background, Physics, Pulsar timing array, Supermassive black hole, Pulsar, Gravitational wave, Astrophysics::High Energy Astrophysical Phenomena, Galaxy formation and evolution, Astronomy, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics, Galaxy
Abstract

Galaxies and supermassive black holes (SMBHs) are believed to evolve through a process of hierarchical merging and accretion. Through this paradigm, multiple SMBH systems are expected to be relatively common in the Universe. However, to date there are poor observational constraints on multiple SMBHs systems with separations comparable to a SMBH gravitational sphere of influence (<< 1 kpc). In this chapter, we discuss how deep continuum observations with the SKA will make leading contributions towards understanding how multiple black hole systems impact galaxy evolution. In addition, these observations will provide constraints on and an understanding of stochastic gravitational wave background detections in the pulsar timing array sensitivity band (nanoHz -microHz). We also discuss how targets for pointed gravitational wave experiments (that cannot be resolved by VLBI) could potentially be found using the large-scale radio-jet morphology, which can be modulated by the presence of a close-pair binary SMBH system. The combination of direct imaging at high angular resolution; low-surface brightness radio-jet tracers; and pulsar timing arrays will allow the SKA to trace black hole binary evolution from separations of a galaxy virial radius down to the sub-parsec level. This large dynamic range in binary SMBH separation will ensure that the SKA plays a leading role in this observational frontier.

Published
2015

3. SKA studies of nearby galaxies: star-formation, accretion processes and molecular gas across all environments

Author

Megan Argo, Susanne Aalto, T. W. B. Muxlow, Elias Brinks, Eric J. Murphy, A. Rushton, Miguel A. Pérez-Torres, Eva Schinnerer, Clive Dickinson, D Fenech, Michael W. Peel, John Conway, Anita M. S. Richards, A. Alberdi, I. van Bemmel, Robert Beswick, Malcolm Gray, and H. R. Kloeckner

Subjects
Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Molecular line, Star formation, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - Astrophysics of Galaxies, Galaxy, Accretion (astrophysics), Astrophysics of Galaxies (astro-ph.GA), Surface brightness, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The SKA will be a transformational instrument in the study of our local Universe. In particular, by virtue of its high sensitivity (both to point sources and diffuse low surface brightness emission), angular resolution and the frequency ranges covered, the SKA will undertake a very wide range of astrophysical research in the field of nearby galaxies. By surveying vast numbers of nearby galaxies of all types with $\mu$Jy sensitivity and sub-arcsecond angular resolutions at radio wavelengths, the SKA will provide the cornerstone of our understanding of star-formation and accretion activity in the local Universe. In this chapter we outline the key continuum and molecular line science areas where the SKA, both during phase-1 and when it becomes the full SKA, will have a significant scientific impact., Comment: 23 pages, 4 figures, to appear as part of 'Continuum Science' in Proceedings 'Advancing Astrophysics with the Square Kilometre Array' PoS(AASKA14)070

Published
2014

4. VLBI imaging of OH absorption

Author

H. R. Kloeckner, Yoshiaki Hagiwara, Willem A. Baan, and Kapteyn Astronomical Institute

Subjects
SUPERBUBBLE, European VLBI Network, Astrophysics::High Energy Astrophysical Phenomena, galaxies : active, Continuum (design consultancy), CIRCUMNUCLEAR TORUS, FOS: Physical sciences, Superbubble, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Rotation, PARSEC, galaxies : Seyfert, DISK, Very-long-baseline interferometry, galaxies : individual : NGC 3079, radio lines : galaxies, LOBE GALAXY NGC-3079, OUTFLOW, Absorption (electromagnetic radiation), MASER EMISSION, Astrophysics::Galaxy Astrophysics, Physics, Astrophysics (astro-ph), NGC 3079, Astronomy and Astrophysics, MOLECULAR GAS, Space and Planetary Science, JETS, Vector field, Outflow, galaxies : ISM
Abstract

Broad hydroxyl (OH) absorption-lines in the 1667 MHz and 1665 MHz transition towards the central region of NGC 3079 have been observed at high resolution with the European VLBI Network (EVN). Velocity fields of two OH absorption components were resolved across the unresolved nuclear radio continuum of ~10 parsecs. The velocity field of the OH absorption close to the systemic velocity shows rotation in nearly the same sense as the edge-on galactic-scale molecular disk probed by CO(1-0) emission. The velocity field of the blue-shifted OH absorption displays a gradient in almost the opposite direction. The blue-shifted velocity field represents a non-rotational component, which may trace an outflow from the nucleus, or material driven and shocked by the kiloparsec-scale superbubble. This OH absorption component traces a structure that does not support a counter-rotating disk suggested on the basis of the neutral hydrogen absorption., Comment: 9 pages, 10 figures, submitted to MNRAS (03/12/2003)

Published
2004

5. Goonhilly a new side for e-MERLIN

Author

Melvin Hoare, Simon Garrington, H. R. Kloeckner, Matt J. Jarvis, I. Jones, Steve Rawlings, Robert Beswick, Ian Heywood, H. J. van Langevelde, T. W. B. Muxlow, and J. Hatchell

Subjects
Merlin (protein), media_common.quotation_subject, Astronomy, Art, media_common
Published
2011

6. Very Long Baseline Interferometry with the SKA

Author

Bong Won Sohn, V. M. Tudose, G. B. Taylor, Adam Deller, Leith Godfrey, Roger Deane, Tim O'Brien, B. Zhang, G. Surcis, A. de Witt, Andreas Brunthaler, A. Szomoru, Magdalena Kunert-Bajraszewska, J. Moldon, Jun Yang, M. A. Garrett, Tao An, Marcin P. Gawronski, Heino Falcke, J. Quick, Richard Dodson, R. Vermeulen, Giuseppe Cimo, Preeti Kharb, Steven Tingay, A. Rushton, José L. Gómez, John McKean, Robert Beswick, Matthew L. Lister, H. R. Kloeckner, Tiziana Venturi, D. Cseh, S. V. Pogrebenko, Miguel A. Pérez-Torres, M. J. Reid, A. J. van der Horst, H. J. van Langevelde, Olaf Wucknitz, Wouter Vlemmings, T. W. B. Muxlow, Gabriele Giovannini, Zsolt Paragi, James Miller-Jones, Ciriaco Goddi, Sándor Frey, Enno Middelberg, P. Charlot, Ivan Marti-Vidal, M. Gaylard, Maria Rioja, Megan Argo, H. E. Bignall, A. Biggs, X. W. Zheng, T. Jung, J. van Leeuwen, S. Corbel, F. Mantovani, C. Reynolds, Sharmila Goedhart, E. Koerding, P. Boven, Hiroshi Imai, M. Mezcua, M. Bietenholz, Marcello Giroletti, A. Gunn, Yuri Y. Kovalev, A. Alberdi, John Conway, Krisztina É. Gabányi, Eduardo Ros, Michael Lindqvist, A. P. Lobanov, L. Gurvits, Iván Agudo, O. Smirnov, F. Colomer, B. Campbell, Anton Zensus, R. Schilizzi, MedisysResearch Lab (Medisys), Philips Research, Los Alamos National Laboratory (LANL), M2A 2014, Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux (L3AB), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB), Max-Planck-Institut für Extraterrestrische Physik (MPE), Division of Nephrology and Rheumatology, Aichi Medical University School of Medicine, Zhejiang University of Science and Technology, Laboratoire Traitement et Communication de l'Information (LTCI), Télécom ParisTech-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), CYBELE, Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Tsinghua University [Beijing] (THU), Télécom ParisTech, Cardiff University, Netherlands Institute for Radio Astronomy (ASTRON), Departament d'Astronomia i Meteorologia [Barcelona], Universitat de Barcelona (UB), Jodrell Bank Centre for Astrophysics (JBCA), University of Manchester [Manchester], Korea Astronomy and Space Science Institute (KASI), TNO Automotive, TNO Automotive - Delft, Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Okayama University, Pomies, Marie-Paule, Kapteyn Astronomical Institute, Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Aix Marseille Université (AMU)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Aix Marseille Université (AMU)-Institut de Recherche pour le Développement (IRD), Tsinghua University [Beijing], The Netherlands Institute for Radio Astronomy (ASTRON), 7990-AA Dwingeloo, Netherlands, Institut de Ciènces del Cosmos (ICC), Universitat de Barcelona (UB)-Universitat de Barcelona (UB), Jodrell Bank Centre for Astrophysics, and Okayama University [Okayama]

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Real-time computing, FOS: Physical sciences, Astrophysics, 01 natural sciences, Radio telescope, 0103 physical sciences, Very-long-baseline interferometry, Solar and Stellar Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), High Energy Astrophysical Phenomena, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Astrophysics of Galaxies, 010308 nuclear & particles physics, Astronomy, Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics, Astrophysics of Galaxies (astro-ph.GA), Instrumentation and Methods for Astrophysics, [PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph], Cosmology and Nongalactic Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Adding VLBI capability to the SKA arrays will greatly broaden the science of the SKA, and is feasible within the current specifications. SKA-VLBI can be initially implemented by providing phased-array outputs for SKA1-MID and SKA1-SUR and using these extremely sensitive stations with other radio telescopes, and in SKA2 by realising a distributed configuration providing baselines up to thousands of km, merging it with existing VLBI networks. The motivation for and the possible realization of SKA-VLBI is described in this paper., 19 pages SKA-VLBI review paper with 5 figures, to be published in the proceedings of "Advancing Astrophysics with the Square Kilometre Array", PoS(AASKA14)143

Catalog

Books, media, physical & digital resources
See catalog results