Discovery of a Powerful >10 61 erg AGN Outburst in the Distant Galaxy Cluster SPT-CLJ0528-5300
© 2019. The American Astronomical Society. All rights reserved. We present ∼103 ks of Chandra observations of the galaxy cluster SPT-CLJ0528-5300 (SPT0528, z = 0.768). This cluster harbors the most radio-loud (L 1.4GHz = 1.01 × 1033 erg s-1 Hz-1) central active galactic nucleus (AGN) of any cluster...
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ftmit:oai:dspace.mit.edu:1721.1/132472 2023-06-11T04:16:48+02:00 Discovery of a Powerful >10 61 erg AGN Outburst in the Distant Galaxy Cluster SPT-CLJ0528-5300 Calzadilla, Michael S McDonald, Michael Bayliss, Matthew Benson, Bradford A Bleem, Lindsey E Brodwin, Mark Edge, Alastair C Floyd, Benjamin Gupta, Nikhel Hlavacek-Larrondo, Julie McNamara, Brian R Reichardt, Christian L 2020-11-03T18:10:38Z application/pdf https://hdl.handle.net/1721.1/132472 en eng American Astronomical Society 10.3847/2041-8213/AB5B07 Astrophysical Journal Letters https://hdl.handle.net/1721.1/132472 Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The American Astronomical Society Article http://purl.org/eprint/type/JournalArticle 2020 ftmit 2023-05-29T08:20:21Z © 2019. The American Astronomical Society. All rights reserved. We present ∼103 ks of Chandra observations of the galaxy cluster SPT-CLJ0528-5300 (SPT0528, z = 0.768). This cluster harbors the most radio-loud (L 1.4GHz = 1.01 × 1033 erg s-1 Hz-1) central active galactic nucleus (AGN) of any cluster in the South Pole Telescope (SPT) Sunyaev-Zeldovich survey with available X-ray data. We find evidence of AGN-inflated cavities in the X-ray emission, which are consistent with the orientation of the jet direction revealed by Australia Telescope Compact Array radio data. The combined probability that two such depressions-each at ∼1.4-1.8σ significance, oriented ∼180° apart and aligned with the jet axis-would occur by chance is 0.1%. At ⪆1061 erg, the outburst in SPT0528 is among the most energetic known in the universe, and certainly the most powerful known at z > 0.25. This work demonstrates that such powerful outbursts can be detected even in shallow X-ray exposures out to relatively high redshifts (z ∼ 0.8), providing an avenue for studying the evolution of extreme AGN feedback. The ratio of the cavity power (Pcaw=(9.4 ±5.8)× 1045 erg s-1) to the cooling luminosity (L cool = (1.5 ± 0.5) × 1044 erg s-1) for SPT0528 is among the highest measured to date. If, in the future, additional systems are discovered at similar redshifts with equally high P cav/L cool ratios, it would imply that the feedback/cooling cycle was not as gentle at high redshifts as in the low-redshift universe. Article in Journal/Newspaper South pole DSpace@MIT (Massachusetts Institute of Technology) South Pole |
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DSpace@MIT (Massachusetts Institute of Technology) |
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ftmit |
language |
English |
description |
© 2019. The American Astronomical Society. All rights reserved. We present ∼103 ks of Chandra observations of the galaxy cluster SPT-CLJ0528-5300 (SPT0528, z = 0.768). This cluster harbors the most radio-loud (L 1.4GHz = 1.01 × 1033 erg s-1 Hz-1) central active galactic nucleus (AGN) of any cluster in the South Pole Telescope (SPT) Sunyaev-Zeldovich survey with available X-ray data. We find evidence of AGN-inflated cavities in the X-ray emission, which are consistent with the orientation of the jet direction revealed by Australia Telescope Compact Array radio data. The combined probability that two such depressions-each at ∼1.4-1.8σ significance, oriented ∼180° apart and aligned with the jet axis-would occur by chance is 0.1%. At ⪆1061 erg, the outburst in SPT0528 is among the most energetic known in the universe, and certainly the most powerful known at z > 0.25. This work demonstrates that such powerful outbursts can be detected even in shallow X-ray exposures out to relatively high redshifts (z ∼ 0.8), providing an avenue for studying the evolution of extreme AGN feedback. The ratio of the cavity power (Pcaw=(9.4 ±5.8)× 1045 erg s-1) to the cooling luminosity (L cool = (1.5 ± 0.5) × 1044 erg s-1) for SPT0528 is among the highest measured to date. If, in the future, additional systems are discovered at similar redshifts with equally high P cav/L cool ratios, it would imply that the feedback/cooling cycle was not as gentle at high redshifts as in the low-redshift universe. |
format |
Article in Journal/Newspaper |
author |
Calzadilla, Michael S McDonald, Michael Bayliss, Matthew Benson, Bradford A Bleem, Lindsey E Brodwin, Mark Edge, Alastair C Floyd, Benjamin Gupta, Nikhel Hlavacek-Larrondo, Julie McNamara, Brian R Reichardt, Christian L |
spellingShingle |
Calzadilla, Michael S McDonald, Michael Bayliss, Matthew Benson, Bradford A Bleem, Lindsey E Brodwin, Mark Edge, Alastair C Floyd, Benjamin Gupta, Nikhel Hlavacek-Larrondo, Julie McNamara, Brian R Reichardt, Christian L Discovery of a Powerful >10 61 erg AGN Outburst in the Distant Galaxy Cluster SPT-CLJ0528-5300 |
author_facet |
Calzadilla, Michael S McDonald, Michael Bayliss, Matthew Benson, Bradford A Bleem, Lindsey E Brodwin, Mark Edge, Alastair C Floyd, Benjamin Gupta, Nikhel Hlavacek-Larrondo, Julie McNamara, Brian R Reichardt, Christian L |
author_sort |
Calzadilla, Michael S |
title |
Discovery of a Powerful >10 61 erg AGN Outburst in the Distant Galaxy Cluster SPT-CLJ0528-5300 |
title_short |
Discovery of a Powerful >10 61 erg AGN Outburst in the Distant Galaxy Cluster SPT-CLJ0528-5300 |
title_full |
Discovery of a Powerful >10 61 erg AGN Outburst in the Distant Galaxy Cluster SPT-CLJ0528-5300 |
title_fullStr |
Discovery of a Powerful >10 61 erg AGN Outburst in the Distant Galaxy Cluster SPT-CLJ0528-5300 |
title_full_unstemmed |
Discovery of a Powerful >10 61 erg AGN Outburst in the Distant Galaxy Cluster SPT-CLJ0528-5300 |
title_sort |
discovery of a powerful >10 61 erg agn outburst in the distant galaxy cluster spt-clj0528-5300 |
publisher |
American Astronomical Society |
publishDate |
2020 |
url |
https://hdl.handle.net/1721.1/132472 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
The American Astronomical Society |
op_relation |
10.3847/2041-8213/AB5B07 Astrophysical Journal Letters https://hdl.handle.net/1721.1/132472 |
op_rights |
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. |
_version_ |
1768375423360565248 |