FRONTIER FIELDS CLUSTERS: DEEP CHANDRA OBSERVATIONS OF THE COMPLEX MERGER MACS J1149.6+2223
ABSTRACT The Hubble Space Telescope Frontier Fields cluster MACS J1149.6+2223 is one of the most complex merging clusters, believed to consist of four dark matter halos. We present results from deep (365 ks) Chandra observations of the cluster, which reveal the most distant cold front (z = 0.544) di...
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| Veröffentlicht in: | The Astrophysical journal 2016-03, Vol.819 (2), p.113 |
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| creator | Ogrean, G. A. Weeren, R. J. van Jones, C. Forman, W. Dawson, W. A. Golovich, N. Andrade-Santos, F. Murray, S. S. Nulsen, P. Roediger, E. Zitrin, A. Bulbul, E. Kraft, R. Goulding, A. Umetsu, K. Mroczkowski, T. Bonafede, A. Randall, S. Sayers, J. Churazov, E. David, L. Merten, J. Donahue, M. Mason, B. Rosati, P. Vikhlinin, A. Ebeling, H. |
| description | ABSTRACT The Hubble Space Telescope Frontier Fields cluster MACS J1149.6+2223 is one of the most complex merging clusters, believed to consist of four dark matter halos. We present results from deep (365 ks) Chandra observations of the cluster, which reveal the most distant cold front (z = 0.544) discovered to date. In the cluster outskirts, we also detect hints of a surface brightness edge that could be the bow shock preceding the cold front. The substructure analysis of the cluster identified several components with large relative radial velocities, thus indicating that at least some collisions occur almost along the line of sight. The inclination of the mergers with respect to the plane of the sky poses significant observational challenges at X-ray wavelengths. MACS J1149.6+2223 possibly hosts a steep-spectrum radio halo. If the steepness of the radio halo is confirmed, then the radio spectrum, combined with the relatively regular ICM morphology, could indicate that MACS J1149.6+2223 is an old merging cluster. |
| doi_str_mv | 10.3847/0004-637X/819/2/113 |
| format | Article |
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A. ; Weeren, R. J. van ; Jones, C. ; Forman, W. ; Dawson, W. A. ; Golovich, N. ; Andrade-Santos, F. ; Murray, S. S. ; Nulsen, P. ; Roediger, E. ; Zitrin, A. ; Bulbul, E. ; Kraft, R. ; Goulding, A. ; Umetsu, K. ; Mroczkowski, T. ; Bonafede, A. ; Randall, S. ; Sayers, J. ; Churazov, E. ; David, L. ; Merten, J. ; Donahue, M. ; Mason, B. ; Rosati, P. ; Vikhlinin, A. ; Ebeling, H.</creator><creatorcontrib>Ogrean, G. A. ; Weeren, R. J. van ; Jones, C. ; Forman, W. ; Dawson, W. A. ; Golovich, N. ; Andrade-Santos, F. ; Murray, S. S. ; Nulsen, P. ; Roediger, E. ; Zitrin, A. ; Bulbul, E. ; Kraft, R. ; Goulding, A. ; Umetsu, K. ; Mroczkowski, T. ; Bonafede, A. ; Randall, S. ; Sayers, J. ; Churazov, E. ; David, L. ; Merten, J. ; Donahue, M. ; Mason, B. ; Rosati, P. ; Vikhlinin, A. ; Ebeling, H. ; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)</creatorcontrib><description>ABSTRACT The Hubble Space Telescope Frontier Fields cluster MACS J1149.6+2223 is one of the most complex merging clusters, believed to consist of four dark matter halos. We present results from deep (365 ks) Chandra observations of the cluster, which reveal the most distant cold front (z = 0.544) discovered to date. In the cluster outskirts, we also detect hints of a surface brightness edge that could be the bow shock preceding the cold front. The substructure analysis of the cluster identified several components with large relative radial velocities, thus indicating that at least some collisions occur almost along the line of sight. The inclination of the mergers with respect to the plane of the sky poses significant observational challenges at X-ray wavelengths. MACS J1149.6+2223 possibly hosts a steep-spectrum radio halo. If the steepness of the radio halo is confirmed, then the radio spectrum, combined with the relatively regular ICM morphology, could indicate that MACS J1149.6+2223 is an old merging cluster.</description><identifier>ISSN: 0004-637X</identifier><identifier>ISSN: 1538-4357</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/0004-637X/819/2/113</identifier><language>eng</language><publisher>United States: The American Astronomical Society</publisher><subject>ASTRONOMY AND ASTROPHYSICS ; Clusters ; Cold fronts ; Galactic halos ; galaxies: clusters: general ; galaxies: clusters: individual (MACS J1149.6+2223) ; galaxies: clusters: intracluster medium ; Halos ; Hubble Space Telescope ; Merging ; Radio ; Steepness</subject><ispartof>The Astrophysical journal, 2016-03, Vol.819 (2), p.113</ispartof><rights>2016. The American Astronomical Society. 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A.</creatorcontrib><creatorcontrib>Weeren, R. J. van</creatorcontrib><creatorcontrib>Jones, C.</creatorcontrib><creatorcontrib>Forman, W.</creatorcontrib><creatorcontrib>Dawson, W. A.</creatorcontrib><creatorcontrib>Golovich, N.</creatorcontrib><creatorcontrib>Andrade-Santos, F.</creatorcontrib><creatorcontrib>Murray, S. 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(LLNL), Livermore, CA (United States)</creatorcontrib><title>FRONTIER FIELDS CLUSTERS: DEEP CHANDRA OBSERVATIONS OF THE COMPLEX MERGER MACS J1149.6+2223</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>ABSTRACT The Hubble Space Telescope Frontier Fields cluster MACS J1149.6+2223 is one of the most complex merging clusters, believed to consist of four dark matter halos. We present results from deep (365 ks) Chandra observations of the cluster, which reveal the most distant cold front (z = 0.544) discovered to date. In the cluster outskirts, we also detect hints of a surface brightness edge that could be the bow shock preceding the cold front. The substructure analysis of the cluster identified several components with large relative radial velocities, thus indicating that at least some collisions occur almost along the line of sight. The inclination of the mergers with respect to the plane of the sky poses significant observational challenges at X-ray wavelengths. MACS J1149.6+2223 possibly hosts a steep-spectrum radio halo. If the steepness of the radio halo is confirmed, then the radio spectrum, combined with the relatively regular ICM morphology, could indicate that MACS J1149.6+2223 is an old merging cluster.</description><subject>ASTRONOMY AND ASTROPHYSICS</subject><subject>Clusters</subject><subject>Cold fronts</subject><subject>Galactic halos</subject><subject>galaxies: clusters: general</subject><subject>galaxies: clusters: individual (MACS J1149.6+2223)</subject><subject>galaxies: clusters: intracluster medium</subject><subject>Halos</subject><subject>Hubble Space Telescope</subject><subject>Merging</subject><subject>Radio</subject><subject>Steepness</subject><issn>0004-637X</issn><issn>1538-4357</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqF0U9r2zAYBnAzNljW7RPsIgqDwXCtf7ak3VxHaTKcuNjuKPQgFFmmDmnsWc5h334KKd2lbCfxit_7Hp4nCD4jeEU4ZRGEkIYJYfcRRyLCEULkTTBDMeEhJTF7G8xexPvgg3O704iFmAUPi7LY1CtZgsVK5vMKZPldVcuy-g7mUt6CbJlu5mUKiutKlj_TelVsKlAsQL2UICvWt7m8B2tZ3vgD6zSrwA-EqLhKvmGMycfgXav3zn56fi-Cu4Wss2WYFzerLM1DQxGewhYxTRubaIptk4gthjGPGfS_vN02ArGtNrqByCZGa06xaTUxbYztNoGMJoxcBJfnu72bOuVMN1nzaPrDwZpJIUqg4Mijr2c0jP2vo3WTeuqcsfu9Ptj-6BTikCOEuPf_pYwzwWPKhafkTM3YOzfaVg1j96TH3wpBdapGnZJWp-CVr0Zh5avxW1_OW10_qF1_HA8-HqWH3V-jhqb1LnrF_evyH0HQkn4</recordid><startdate>20160310</startdate><enddate>20160310</enddate><creator>Ogrean, G. A.</creator><creator>Weeren, R. J. van</creator><creator>Jones, C.</creator><creator>Forman, W.</creator><creator>Dawson, W. A.</creator><creator>Golovich, N.</creator><creator>Andrade-Santos, F.</creator><creator>Murray, S. S.</creator><creator>Nulsen, P.</creator><creator>Roediger, E.</creator><creator>Zitrin, A.</creator><creator>Bulbul, E.</creator><creator>Kraft, R.</creator><creator>Goulding, A.</creator><creator>Umetsu, K.</creator><creator>Mroczkowski, T.</creator><creator>Bonafede, A.</creator><creator>Randall, S.</creator><creator>Sayers, J.</creator><creator>Churazov, E.</creator><creator>David, L.</creator><creator>Merten, J.</creator><creator>Donahue, M.</creator><creator>Mason, B.</creator><creator>Rosati, P.</creator><creator>Vikhlinin, A.</creator><creator>Ebeling, H.</creator><general>The American Astronomical Society</general><general>Institute of Physics (IOP)</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OIOZB</scope><scope>OTOTI</scope></search><sort><creationdate>20160310</creationdate><title>FRONTIER FIELDS CLUSTERS: DEEP CHANDRA OBSERVATIONS OF THE COMPLEX MERGER MACS J1149.6+2223</title><author>Ogrean, G. A. ; Weeren, R. J. van ; Jones, C. ; Forman, W. ; Dawson, W. A. ; Golovich, N. ; Andrade-Santos, F. ; Murray, S. S. ; Nulsen, P. ; Roediger, E. ; Zitrin, A. ; Bulbul, E. ; Kraft, R. ; Goulding, A. ; Umetsu, K. ; Mroczkowski, T. ; Bonafede, A. ; Randall, S. ; Sayers, J. ; Churazov, E. ; David, L. ; Merten, J. ; Donahue, M. ; Mason, B. ; Rosati, P. ; Vikhlinin, A. ; Ebeling, H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c412t-f17a4de6a42ed69b205857017a8fbd917bacad01e6caa842cfa3cf52eb6074673</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>ASTRONOMY AND ASTROPHYSICS</topic><topic>Clusters</topic><topic>Cold fronts</topic><topic>Galactic halos</topic><topic>galaxies: clusters: general</topic><topic>galaxies: clusters: individual (MACS J1149.6+2223)</topic><topic>galaxies: clusters: intracluster medium</topic><topic>Halos</topic><topic>Hubble Space Telescope</topic><topic>Merging</topic><topic>Radio</topic><topic>Steepness</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ogrean, G. 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S.</au><au>Nulsen, P.</au><au>Roediger, E.</au><au>Zitrin, A.</au><au>Bulbul, E.</au><au>Kraft, R.</au><au>Goulding, A.</au><au>Umetsu, K.</au><au>Mroczkowski, T.</au><au>Bonafede, A.</au><au>Randall, S.</au><au>Sayers, J.</au><au>Churazov, E.</au><au>David, L.</au><au>Merten, J.</au><au>Donahue, M.</au><au>Mason, B.</au><au>Rosati, P.</au><au>Vikhlinin, A.</au><au>Ebeling, H.</au><aucorp>Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>FRONTIER FIELDS CLUSTERS: DEEP CHANDRA OBSERVATIONS OF THE COMPLEX MERGER MACS J1149.6+2223</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. J</addtitle><date>2016-03-10</date><risdate>2016</risdate><volume>819</volume><issue>2</issue><spage>113</spage><pages>113-</pages><issn>0004-637X</issn><issn>1538-4357</issn><eissn>1538-4357</eissn><abstract>ABSTRACT The Hubble Space Telescope Frontier Fields cluster MACS J1149.6+2223 is one of the most complex merging clusters, believed to consist of four dark matter halos. We present results from deep (365 ks) Chandra observations of the cluster, which reveal the most distant cold front (z = 0.544) discovered to date. In the cluster outskirts, we also detect hints of a surface brightness edge that could be the bow shock preceding the cold front. The substructure analysis of the cluster identified several components with large relative radial velocities, thus indicating that at least some collisions occur almost along the line of sight. The inclination of the mergers with respect to the plane of the sky poses significant observational challenges at X-ray wavelengths. MACS J1149.6+2223 possibly hosts a steep-spectrum radio halo. If the steepness of the radio halo is confirmed, then the radio spectrum, combined with the relatively regular ICM morphology, could indicate that MACS J1149.6+2223 is an old merging cluster.</abstract><cop>United States</cop><pub>The American Astronomical Society</pub><doi>10.3847/0004-637X/819/2/113</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | The Astrophysical journal, 2016-03, Vol.819 (2), p.113 |
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| language | eng |
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| source | Institute of Physics Open Access Journal Titles |
| subjects | ASTRONOMY AND ASTROPHYSICS Clusters Cold fronts Galactic halos galaxies: clusters: general galaxies: clusters: individual (MACS J1149.6+2223) galaxies: clusters: intracluster medium Halos Hubble Space Telescope Merging Radio Steepness |
| title | FRONTIER FIELDS CLUSTERS: DEEP CHANDRA OBSERVATIONS OF THE COMPLEX MERGER MACS J1149.6+2223 |
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