期刊
ASTROPHYSICAL JOURNAL
卷 695, 期 2, 页码 1351-1356出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/695/2/1351
关键词
BL Lacertae objects: individual (H 2356-309); cosmology: observations; diffuse radiation; X-rays: diffuse background; X-rays: galaxies: clusters
资金
- NASA through Chandra Award [GO7-8140X]
- Smithsonian Astrophysical Observatory [NAS8-03060]
- NASA-XMM [NNX07AT24G]
- Jet Propulsion Laboratory, California Institute of Technology
- National Aeronautics and Space Administration
- [H 2356-309]
We present XMM Reflection Grating Spectrometer (RGS) and Chandra Low-Energy Transmission Grating (LETG) observations of the blazar, H 2356-309, located behind the Sculptor Wall, a large-scale galaxy structure expected to harbor high-density Warm-Hot Intergalactic Medium (WHIM). Our simultaneous analysis of the RGS and LETG spectra yields a 3 sigma detection of the crucial redshifted O VII K alpha line with a column density (greater than or similar to 10(16) cm(-2)) consistent with similar large-scale structures produced in cosmological simulations. This represents the first detection of nonlocal WHIM from X-ray absorption studies where XMM and Chandra data are analyzed simultaneously and the absorber redshift is already known, thus providing robust evidence for the expected repository of the missing baryons.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据