Large angular scale fluctuations in the X-ray background

被引：0

作者：

Treyer, M ^{[1
]}

Scharf, C ^{[1
]}

Lahav, O ^{[1
]}

Jahoda, K ^{[1
]}

Boldt, E ^{[1
]}

Piran, T ^{[1
]}

机构：

[1] AIP, D-14842 Potsdam, Germany

来源：

LARGE SCALE STRUCTURE: TRACKS AND TRACES | 1998年

关键词：

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is now well established that the X-ray background (XRB) originates from the integrated emission of discrete sources out to cosmological distances. Hence it may be a convenient tracer of the mass distribution on scales intermediate to those explored by local galaxy redshift surveys (similar to 100 Mpc) and by the COBE Microwave background measurements (similar to 1000 Mpc). We present a first attempt to measure and model the large angular scale fluctuations in the XRB from the HEAO-1 A2 data, expressed in terms of spherical harmonics. From the few low-order multipoles detected, we estimate the power-spectrum normalization. We predict that an X-ray whole sky survey resolving sources a factor of 10 fainter than HEAO-1, would allow us to measure the large scale fluctuations of the XRB to order l similar to 20 (theta similar to pi/20), and therefore constrain the large scale structure of the Universe on scales of hundreds of Mpc.

引用

页码：361 / 364

页数：4