University of Hertfordshire

From the same journal

From the same journal

By the same authors

Revived Fossil Plasma Sources in Galaxy Clusters

Research output: Contribution to journalArticlepeer-review

Standard

Revived Fossil Plasma Sources in Galaxy Clusters. / Mandal, S.; Intema, H. T.; Weeren, R. J. van; Shimwell, T. W.; Botteon, A.; Brunetti, G.; Gasperin, F. de; Brüggen, M.; Gennaro, G. Di; Kraft, R.; Röttgering, H. J. A.; Hardcastle, M.; Tasse, C.

In: Astronomy & Astrophysics, Vol. 634, A4, 28.01.2020.

Research output: Contribution to journalArticlepeer-review

Harvard

Mandal, S, Intema, HT, Weeren, RJV, Shimwell, TW, Botteon, A, Brunetti, G, Gasperin, FD, Brüggen, M, Gennaro, GD, Kraft, R, Röttgering, HJA, Hardcastle, M & Tasse, C 2020, 'Revived Fossil Plasma Sources in Galaxy Clusters', Astronomy & Astrophysics, vol. 634, A4. https://doi.org/10.1051/0004-6361/201936560

APA

Mandal, S., Intema, H. T., Weeren, R. J. V., Shimwell, T. W., Botteon, A., Brunetti, G., Gasperin, F. D., Brüggen, M., Gennaro, G. D., Kraft, R., Röttgering, H. J. A., Hardcastle, M., & Tasse, C. (2020). Revived Fossil Plasma Sources in Galaxy Clusters. Astronomy & Astrophysics, 634, [A4]. https://doi.org/10.1051/0004-6361/201936560

Vancouver

Mandal S, Intema HT, Weeren RJV, Shimwell TW, Botteon A, Brunetti G et al. Revived Fossil Plasma Sources in Galaxy Clusters. Astronomy & Astrophysics. 2020 Jan 28;634. A4. https://doi.org/10.1051/0004-6361/201936560

Author

Mandal, S. ; Intema, H. T. ; Weeren, R. J. van ; Shimwell, T. W. ; Botteon, A. ; Brunetti, G. ; Gasperin, F. de ; Brüggen, M. ; Gennaro, G. Di ; Kraft, R. ; Röttgering, H. J. A. ; Hardcastle, M. ; Tasse, C. / Revived Fossil Plasma Sources in Galaxy Clusters. In: Astronomy & Astrophysics. 2020 ; Vol. 634.

Bibtex

@article{b0887cc43cd5476092a263db84ab2017,
title = "Revived Fossil Plasma Sources in Galaxy Clusters",
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 intracluster medium (ICM) by radio galaxies. These synchrotron-emitting electrons are very difficult to study as their radiative lifetime is only tens of Myr at gigahertz frequencies, and they 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 the gigahertz level. However, when a pocket of fossil radio plasma is compressed, it boosts the visibility at sub-gigahertz frequencies, creating what are known as 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 TIFR GMRT Sky Survey and the 1.4 GHz NVSS sky survey to identify candidate radio phoenices. A subset of three candidates was studied in detail using deep multi-band radio observations (LOFAR and GMRT), X-ray obserations (Chandra or 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 will help us to understand the physical origin of these sources.",
keywords = "Galaxies: clusters: individual: Abell 2048, Galaxies: clusters: individual: Abell 2593, Galaxies: clusters: individual: SDSS-C4-DR3-3088, Galaxies: clusters: intracluster medium, Radiation mechanisms: non-thermal, X-rays: galaxies: clusters",
author = "S. Mandal and Intema, {H. T.} and Weeren, {R. J. van} and Shimwell, {T. W.} and A. Botteon and G. Brunetti and Gasperin, {F. de} and M. Br{\"u}ggen and Gennaro, {G. Di} and R. Kraft and R{\"o}ttgering, {H. J. A.} and M. Hardcastle and C. Tasse",
note = "{\textcopyright} 2020 ESO.",
year = "2020",
month = jan,
day = "28",
doi = "10.1051/0004-6361/201936560",
language = "English",
volume = "634",
journal = "Astronomy & Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",

}

RIS

TY - JOUR

T1 - Revived Fossil Plasma Sources in Galaxy Clusters

AU - Mandal, S.

AU - Intema, H. T.

AU - Weeren, R. J. van

AU - Shimwell, T. W.

AU - Botteon, A.

AU - Brunetti, G.

AU - Gasperin, F. de

AU - Brüggen, M.

AU - Gennaro, G. Di

AU - Kraft, R.

AU - Röttgering, H. J. A.

AU - Hardcastle, M.

AU - Tasse, C.

N1 - © 2020 ESO.

PY - 2020/1/28

Y1 - 2020/1/28

N2 - 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 intracluster medium (ICM) by radio galaxies. These synchrotron-emitting electrons are very difficult to study as their radiative lifetime is only tens of Myr at gigahertz frequencies, and they 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 the gigahertz level. However, when a pocket of fossil radio plasma is compressed, it boosts the visibility at sub-gigahertz frequencies, creating what are known as 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 TIFR GMRT Sky Survey and the 1.4 GHz NVSS sky survey to identify candidate radio phoenices. A subset of three candidates was studied in detail using deep multi-band radio observations (LOFAR and GMRT), X-ray obserations (Chandra or 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 will help us to understand the physical origin of these sources.

AB - 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 intracluster medium (ICM) by radio galaxies. These synchrotron-emitting electrons are very difficult to study as their radiative lifetime is only tens of Myr at gigahertz frequencies, and they 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 the gigahertz level. However, when a pocket of fossil radio plasma is compressed, it boosts the visibility at sub-gigahertz frequencies, creating what are known as 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 TIFR GMRT Sky Survey and the 1.4 GHz NVSS sky survey to identify candidate radio phoenices. A subset of three candidates was studied in detail using deep multi-band radio observations (LOFAR and GMRT), X-ray obserations (Chandra or 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 will help us to understand the physical origin of these sources.

KW - Galaxies: clusters: individual: Abell 2048

KW - Galaxies: clusters: individual: Abell 2593

KW - Galaxies: clusters: individual: SDSS-C4-DR3-3088

KW - Galaxies: clusters: intracluster medium

KW - Radiation mechanisms: non-thermal

KW - X-rays: galaxies: clusters

UR - http://www.scopus.com/inward/record.url?scp=85088020544&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201936560

DO - 10.1051/0004-6361/201936560

M3 - Article

VL - 634

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 0004-6361

M1 - A4

ER -