The interstellar oxygen-K absorption edge as observed by XMM-Newton - Separation of instrumental and interstellar components

被引：42

作者：

de Vries, CP

den Herder, JW

Kaastra, JS

Paerels, FB

den Boggende, AJ

Rasmussen, AP

机构：

[1] SRON, Natl Inst Space Res, NL-3584 CA Utrecht, Netherlands

[2] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 404卷 / 03期

关键词：

space vehicles : instruments; X-rays : ISM;

D O I：

10.1051/0004-6361:20030551

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

High resolution X-ray spectra of the Reflection Grating Spectrometer (RGS) on board the XMM satellite are used to resolve the oxygen K absorption edge. By combining spectra of low and high extinction sources, the observed absorption edge can be split in the true interstellar ( ISM) extinction and the instrumental absorption. The detailed ISM edge structure closely follows the edge structure of neutral oxygen as derived by theoretical R-matrix calculations. However, the position of the theoretical edge requires a wavelength shift. In addition the detailed instrumental RGS absorption edge structure is presented. All results are verified by comparing to a subset of Chandra LETG-HRC observations.

引用

页码：959 / 967

页数：9

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