Chandra X-ray observations of Abell 1835 to the virial radius

被引:30
作者
Bonamente, M. [1 ,2 ]
Landry, D. [1 ]
Maughan, B. [3 ]
Giles, P. [3 ]
Joy, M. [2 ]
Nevalainen, J. [4 ]
机构
[1] Univ Alabama, Dept Phys, Huntsville, AL 35899 USA
[2] NASA Natl Space & Technol Ctr, Huntsville, AL 35805 USA
[3] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England
[4] Univ Helsinki, Helsinki 14, Finland
关键词
galaxies: clusters: individual: Abell 1835; large-scale structure of Universe; SOFT EXCESS EMISSION; CLUSTER PKS 0745-191; GALAXY CLUSTERS; INTRACLUSTER MEDIUM; LARGE-SAMPLE; TEMPERATURE; ENTROPY; MASS; PROFILES; DIFFUSE;
D O I
10.1093/mnras/sts202
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report the first Chandra detection of emission out to the virial radius in the cluster Abell 1835 at z = 0.253. Our analysis of the soft X-ray surface brightness shows that emission is present out to a radial distance of 10 arcmin or 2.4 Mpc, and the temperature profile has a factor of 10 drop from the peak temperature of 10 keV to the value at the virial radius. We model the Chandra data from the core to the virial radius and show that the steep temperature profile is not compatible with hydrostatic equilibrium of the hot gas, and that the gas is convectively unstable at the outskirts. A possible interpretation of the Chandra data is the presence of a second phase of warm-hot gas near the cluster's virial radius that is not in hydrostatic equilibrium with the cluster's potential. The observations are also consistent with an alternative scenario in which the gas is significantly clumped at large radii.
引用
收藏
页码:2812 / 2823
页数:12
相关论文
共 57 条
[1]   X-Ray Study of the Outer Region of Abell 2142 with Suzaku [J].
Akamatsu, Hiroki ;
Hoshino, Akio ;
Ishisaki, Yoshitaka ;
Ohashi, Takaya ;
Sato, Kosuke ;
Takei, Yoh ;
Ota, Naomi .
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 2011, 63 :S1019-S1033
[2]   Giant ringlike radio structures around galaxy cluster Abell 3376 [J].
Bagchi, Joydeep ;
Durret, Florence ;
Lima Neto, Gastao B. ;
Paul, Surajit .
SCIENCE, 2006, 314 (5800) :791-794
[3]   Suzaku Observations of Abell 1795: Cluster Emission to r200 [J].
Bautz, Marshall W. ;
Miller, Eric D. ;
Sanders, Jeremy S. ;
Arnaud, Keith A. ;
Mushotzky, Richard F. ;
Porter, F. Scott ;
Hayashida, Kiyoshi ;
Henry, J. Patrick ;
Hughes, John P. ;
Kawaharada, Madoka ;
Makishima, Kazuo ;
Sato, Mitsuhiro ;
Tamura, Takayuki .
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 2009, 61 (05) :1117-1133
[4]   Thermal and nonthermal nature of the soft excess emission from Sersic 159-03 observed with XMM-Newton [J].
Bonamente, M ;
Lieu, R ;
Mittaz, JPD ;
Kaastra, JS ;
Nevalainen, J .
ASTROPHYSICAL JOURNAL, 2005, 629 (01) :192-203
[5]   Markov Chain Monte Carlo joint analysis of Chandra X-ray imaging spectroscopy and Sunyaev-Zel'dovich effect data [J].
Bonamente, M ;
Joy, MK ;
Carlstrom, JE ;
Reese, ED ;
LaRoque, SJ .
ASTROPHYSICAL JOURNAL, 2004, 614 (01) :56-63
[6]   A massive warm baryonic halo in the Coma Cluster [J].
Bonamente, M ;
Joy, MK ;
Lieu, R .
ASTROPHYSICAL JOURNAL, 2003, 585 (02) :722-729
[7]   THE DIFFUSE SOFT EXCESS EMISSION IN THE COMA CLUSTER FROM THE ROSAT ALL-SKY SURVEY [J].
Bonamente, M. ;
Lieu, R. ;
Bulbul, E. .
ASTROPHYSICAL JOURNAL, 2009, 696 (02) :1886-1891
[8]   The soft X-ray emission in a large sample of galaxy clusters with the ROSAT Position Sensitive Proportional Counter [J].
Bonamente, M ;
Lieu, R ;
Joy, MK ;
Nevalainen, JH .
ASTROPHYSICAL JOURNAL, 2002, 576 (02) :688-707
[9]   Sersic 159-03: Discovery of the brightest soft X-ray excess emitting cluster of galaxies [J].
Bonamente, M ;
Lieu, R ;
Mittaz, JPD .
ASTROPHYSICAL JOURNAL, 2001, 561 (01) :L63-L67
[10]   Determination of the cosmic distance scale from Sunyaev-Zel'dovich effect and chandra X-ray measurements of high-redshift galaxy clusters [J].
Bonamente, Massimiliano ;
Joy, Marshall K. ;
LaRoque, Samuel J. ;
Carlstrom, John E. ;
Reese, Erik D. ;
Dawson, Kyle S. .
ASTROPHYSICAL JOURNAL, 2006, 647 (01) :25-54