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

页码：L85 / L88

页数：4

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