FRONTIER FIELDS CLUSTERS: DEEP CHANDRA OBSERVATIONS OF THE COMPLEX MERGER MACS J1149.6+2223

G. A. Ogrean; R. J. Van Weeren; C. Jones; W. Forman; W. A. Dawson; N. Golovich; F. Andrade-Santos; S. S. Murray; P. Nulsen; E. Roediger; A. Zitrin; E. Bulbul; R. Kraft; A. Goulding; K. Umetsu; T. Mroczkowski; A. Bonafede; S. Randall; J. Sayers; E. Churazov; L. David; J. Merten; M. Donahue; B. Mason; P. Rosati; A. Vikhlinin; H. Ebeling

doi:10.3847/0004-637X/819/2/113

FRONTIER FIELDS CLUSTERS: DEEP CHANDRA OBSERVATIONS OF THE COMPLEX MERGER MACS J1149.6+2223

G. A. Ogrean, R. J. Van Weeren, C. Jones, W. Forman, W. A. Dawson, N. Golovich, F. Andrade-Santos, S. S. Murray, P. Nulsen, E. Roediger, A. Zitrin, E. Bulbul, R. Kraft, A. Goulding, K. Umetsu, T. Mroczkowski, A. Bonafede, S. Randall, J. Sayers, E. ChurazovL. David, J. Merten, M. Donahue, B. Mason, P. Rosati, A. Vikhlinin, H. Ebeling

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

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.

Original language	English
Article number	113
Journal	Astrophysical Journal
Volume	819
Issue number	2
DOIs	https://doi.org/10.3847/0004-637X/819/2/113
State	Published - 10 Mar 2016
Externally published	Yes

Keywords

galaxies: clusters: general
galaxies: clusters: individual (MACS J1149.6+2223)
galaxies: clusters: intracluster medium

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/0004-637X/819/2/113

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Ogrean, G. A., Van Weeren, R. J., 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., ... Ebeling, H. (2016). FRONTIER FIELDS CLUSTERS: DEEP CHANDRA OBSERVATIONS OF THE COMPLEX MERGER MACS J1149.6+2223. Astrophysical Journal, 819(2), Article 113. https://doi.org/10.3847/0004-637X/819/2/113

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title = "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) 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.",

keywords = "galaxies: clusters: general, galaxies: clusters: individual (MACS J1149.6+2223), galaxies: clusters: intracluster medium",

author = "Ogrean, {G. A.} and {Van Weeren}, {R. J.} and C. Jones and W. Forman and Dawson, {W. A.} and N. Golovich and F. Andrade-Santos and Murray, {S. S.} and P. Nulsen and E. Roediger and A. Zitrin and E. Bulbul and R. Kraft and A. Goulding and K. Umetsu and T. Mroczkowski and A. Bonafede and S. Randall and J. Sayers and E. Churazov and L. David and J. Merten and M. Donahue and B. Mason and P. Rosati and A. Vikhlinin and H. Ebeling",

year = "2016",

month = mar,

day = "10",

doi = "10.3847/0004-637X/819/2/113",

language = "English",

volume = "819",

journal = "Astrophysical Journal",

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Ogrean, GA, Van Weeren, RJ, Jones, C, Forman, W, Dawson, WA, Golovich, N, Andrade-Santos, F, Murray, SS, 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 2016, 'FRONTIER FIELDS CLUSTERS: DEEP CHANDRA OBSERVATIONS OF THE COMPLEX MERGER MACS J1149.6+2223', Astrophysical Journal, vol. 819, no. 2, 113. https://doi.org/10.3847/0004-637X/819/2/113

TY - JOUR

T1 - FRONTIER FIELDS CLUSTERS

T2 - DEEP CHANDRA OBSERVATIONS OF THE COMPLEX MERGER MACS J1149.6+2223

AU - Ogrean, G. A.

AU - Van Weeren, R. J.

AU - Jones, C.

AU - Forman, W.

AU - Dawson, W. A.

AU - Golovich, N.

AU - Andrade-Santos, F.

AU - Murray, S. S.

AU - Nulsen, P.

AU - Roediger, E.

AU - Zitrin, A.

AU - Bulbul, E.

AU - Kraft, R.

AU - Goulding, A.

AU - Umetsu, K.

AU - Mroczkowski, T.

AU - Bonafede, A.

AU - Randall, S.

AU - Sayers, J.

AU - Churazov, E.

AU - David, L.

AU - Merten, J.

AU - Donahue, M.

AU - Mason, B.

AU - Rosati, P.

AU - Vikhlinin, A.

AU - Ebeling, H.

PY - 2016/3/10

Y1 - 2016/3/10

N2 - 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.

AB - 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.

KW - galaxies: clusters: general

KW - galaxies: clusters: individual (MACS J1149.6+2223)

KW - galaxies: clusters: intracluster medium

UR - http://www.scopus.com/inward/record.url?scp=84961785307&partnerID=8YFLogxK

U2 - 10.3847/0004-637X/819/2/113

DO - 10.3847/0004-637X/819/2/113

M3 - Article

AN - SCOPUS:84961785307

SN - 0004-637X

VL - 819

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 113

ER -

FRONTIER FIELDS CLUSTERS: DEEP CHANDRA OBSERVATIONS OF THE COMPLEX MERGER MACS J1149.6+2223

Abstract

Keywords

ASJC Scopus subject areas

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