DO CLUSTERS OF GALAXIES AFFECT THE SPECTRUM OF THE MICROWAVE BACKGROUND

被引:22
作者
MARKEVITCH, M
BLUMENTHAL, GR
FORMAN, W
JONES, C
SUNYAEV, RA
机构
[1] UNIV CALIF SANTA CRUZ,LICK OBSERV,BOARD STUDIES ASTRON & ASTROPHYS,SANTA CRUZ,CA 95064
[2] ACAD SCI USSR,INST SPACE RES,MOSCOW 117810,USSR
关键词
COSMIC BACKGROUND RADIATION; COSMOLOGY; GALAXIES; CLUSTERING;
D O I
10.1086/186135
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Motivated by recent COBE limits on the spectral distortions in the cosmic microwave background radiation, we calculate the distortion, averaged over the sky, due to the Compton scattering of background photons with electrons in the hot gas in clusters of galaxies. Using an existing sample of X-ray clusters, various values of the density parameter OMEGA, and plausible models for cluster evolution (or lack thereof), we generate Monte Carlo realizations of the microwave sky. The spatial structure of these simulations shows a network of discrete sources whose properties can be a strong function of both evolution and OMEGA. The amount of spectral distortion in the models is greatest for models characterized by self-similar cluster evolution in an open universe and is within an order of magnitude of the current upper limits. Thus, improved observational sensitivity must inevitably detect some deviation from a blackbody spectrum.
引用
收藏
页码:L33 / L36
页数:4
相关论文
共 18 条
[1]   THE SUNYAEV-ZELDOVICH EFFECT TOWARDS 3 CLUSTERS OF GALAXIES [J].
BIRKINSHAW, M ;
GULL, SF ;
HARDEBECK, H .
NATURE, 1984, 309 (5963) :34-35
[2]  
BIRKINSHAW M, 1990, COSMIC MICROWAVE BAC, P77
[3]  
BURG R, 1991, UNPUB
[4]  
CHENG ES, 1991, BAAS, V23, P896
[5]  
FORMAN W, 1973, APJ, V178, P309
[6]   THE PHYSICAL IMPLICATIONS OF AN ISOTHERMAL MODEL FOR THE HOT INTRACLUSTER MEDIUM [J].
HENRIKSEN, MJ ;
MUSHOTZKY, RF .
ASTROPHYSICAL JOURNAL, 1985, 292 (02) :441-446
[7]  
JONES C, 1991, UNPUB
[8]   EVOLUTION AND CLUSTERING OF RICH CLUSTERS [J].
KAISER, N .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1986, 222 (02) :323-345
[9]  
KAISER N, 1989, CLUSTERS GALAXIES, P327
[10]   X-RAY OBSERVATIONS OF VIRGO CLUSTER, NGC-5128, AND 3C-273 FROM UHURU SATELLITE [J].
KELLOGG, E ;
GURSKY, H ;
LEONG, C ;
SCHREIER, E ;
TANANBAUM, H ;
GIACCONI, R .
ASTROPHYSICAL JOURNAL, 1971, 165 (02) :L49-+