The X-ray properties of 'normal' galaxies

被引：0

作者：

Georgakakis, A ^{[1
]}

Georgantopoulos, I ^{[1
]}

Plionis, M ^{[1
]}

Basilakos, S ^{[1
]}

Kolokotronis, V ^{[1
]}

Stewart, GC ^{[1
]}

Shanks, T ^{[1
]}

Boyle, BJ ^{[1
]}

机构：

[1] Natl Observ Athens, Athens 15236, Greece

来源：

MULTIWAVELENGTH COSMOLOGY | 2004年

关键词：

X-rays; galaxies; surveys;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We explore the X-ray properties of 'normal' (ie non AGN dominated) galaxies using a shallow [f(X) (0.5 - 8keV) approximate to 10(-14) cgs] wide area (approximate to 2.5 deg(2)) XMM-Newton survey. Two 'normal' galaxy candidates are detected in our survey. Despite the small number statistics the sky density of these systems at the flux limit above is low consistent with previous surveys. The number density estimated here is in good agreement with both the log N - log S of 'normal' galaxies in deeper surveys and model predictions based on the X-ray luminosity function of local star-forming galaxies. Stacking analysis is employed to constrain the mean X-ray properties of optically selected galaxies at z approximate to 0. 1 that remain undetected to the limit of our survey. Comparison of our results with similar studies at higher redshifts suggest X-ray evolution of spiral galaxies out to z approximate to 1.

引用

页码：279 / 282

页数：4

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