Chandra observations of NGC 4636 -: An elliptical galaxy in turmoil

被引：150

作者：

Jones, C

Forman, W

Vikhlinin, A

Markevitch, M

David, L

Warmflash, A

Murray, S

Nulsen, PEJ

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[2] Univ Wollongong, Dept Engn Phys, Wollongong, NSW 2522, Australia

来源：

ASTROPHYSICAL JOURNAL | 2002年 / 567卷 / 02期

关键词：

galaxies : active; galaxies : individual (NGC 4636); X-rays : galaxies;

D O I：

10.1086/340114

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Chandra images show symmetric, 8 kpc long, armlike features in the X-ray halo surrounding NGC 4636. The leading edges of these features are sharp and are accompanied by temperature increases of similar to30%. These properties suggest that the armlike structures are produced by shocks, driven by symmetric off-center outbursts. We interpret these observations as part of a cycle in which the cooling gas originally fueled a nuclear outburst about 3 x 10(6) yr ago that led to shocks reheating the cooling gas and thus preventing the accumulation of significant amounts of cooled gas in the galaxy center and temporarily starving the central active galactic nucleus.

引用

页码：L115 / L118

页数：4

共 26 条

[1] ABUNDANCES OF THE ELEMENTS - METEORITIC AND SOLAR [J].