Imaging large-scale structure in the X-ray sky

被引：59
|
作者：
Yang, Y
Mushotzky, RF
Barger, AJ
Cowie, LL
Sanders, DB
Steffen, AT
机构：
[1] Univ Maryland, Dept Astron, College Pk, MD 20742 USA
[2] NASA, High Energy Astrophys Lab, Goddard Space Flight Ctr, Greenbelt, MD 20770 USA
[3] Univ Wisconsin, Dept Astron, Madison, WI 53760 USA
[4] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA
[5] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
[6] Max Planck Inst Extraterr Phys, D-85740 Garching, Germany
来源：
ASTROPHYSICAL JOURNAL | 2003年 / 585卷 / 02期
关键词：
cosmology : observations; galaxies : nuclei; large-scale structure of universe; X-rays : diffuse background; DEEP FIELD-SOUTH; GALAXY REDSHIFT SURVEY; ANGULAR-CORRELATION; CHANDRA;
D O I：
10.1086/374372
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the first results from a wide solid angle, moderately deep Chandra survey of the Lockman Hole North-West region. Our nine ACIS-I fields cover an effective solid angle of 0.4 deg(2) and reach a depth of 3 x 10(-16) ergs cm(-2) s(-1) in the 0.4-2 keV band and 3 x 10(-15) ergs cm(-2) s(-1) in the 2-8 keV band. The best-fit log N-log S for the entire field matches well onto that of the Chandra Deep Field-North. We show that the full range of the "cosmic variance" previously seen in different Chandra fields is reproduced in this small region of the sky. A counts-in-cells analysis shows that the hard-band sources are more strongly correlated than the soft-band sources.
引用
收藏
页码：L85 / L88
页数：4
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