The hot interstellar medium of the Galactic center: Observations with Chandra

被引：0

作者：

Morris, M ^{[1
]}

Howard, C ^{[1
]}

Muno, M ^{[1
]}

Baganoff, FK ^{[1
]}

Park, S ^{[1
]}

Feigelson, E ^{[1
]}

Garmire, G ^{[1
]}

Brandt, N ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

来源：

DENSE INTERSTELLAR MEDIUM IN GALAXIES | 2004年 / 91卷

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：

Deep observations of the Galactic center with the ACIS instrument on the Chandra X-ray Observatory reveal a wealth of detail in the spatial distribution and the spectrum of the hot interstellar gas. Here we describe a few prominent characteristics of the diffuse emission from this region. The diffuse X-ray emission apparently occupying most of the volume within one parsec of the center appears to be partially density bounded on the outside by the dense circumnuclear disk located between 1 and similar to5 pc. Further out, on a scale of similar to10 pc, the diffuse emission is dominated by bipolar X-ray lobes which appear to be centered on the central black hole and oriented perpendicular to the Galactic plane. Within the bipolar lobes are several blobs of X-ray emitting gas which display a rough point reflection symmetry about the center and which are thus consistent with a succession of collimated ejections of hot gas from the immediate vicinity of the black hole. Nonthermal emission from a few places around the rim of the northern lobe of this structure indicates that highly relativistic particles are present in the otherwise apparently thermally emitting lobes.

引用

页码：281 / 285

页数：5

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