INFRARED H AND CO STUDIES OF THE GALACTIC CORE: GCIRS 3 AND GCIRS 1W

INFRARED H AND CO STUDIES OF THE GALACTIC CORE: GCIRS 3 AND GCIRS 1W
复制标题

银河核心的红外 H 和 CO 研究:GCIRS 3 和 GCIRS 1W

DOI:
10.1088/0004-637x/786/2/96
复制
发表时间:
2014
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
Henning
Henning
中科院分区:
--
文献类型:
--
作者:
Geballe;Indriolo;Yusef-Zadeh;Henning

文献摘要

参考文献

被引文献

相似文献

我们获得了H+ 3,R(1,1)l,R(3,3)l和R(2,2)l的关键基本谱线的改进谱,以及CO在朝向红外光源GCIRS 3和GCIRS 1 W的视线上的振转跃迁谱,这两个红外光源都位于银河系中心的中央星系团中,距离Sgr A* 只有几角秒。光谱显示吸收发生在三种气体环境中:(1)与前景螺旋/侧臂相关的冷的稠密和弥漫的气体;(2)温暖和弥漫的气体在很宽的且大多为负的速度范围内吸收,这似乎填充了银河系中央分子区(CMZ)的很大一部分;(3)温暖、致密和致密的云,速度接近+ 50 km s-1,可能在中心的1-2 pc范围内。前两种云类型对中央星团所有源的反射几乎相同,并且与以前在从Sgr A* 到其以东30 pc的视线上观测到的相似。云类型(3)只在中央星团附近观测到,在GCIRS 3和GCIRS 1 W的视线之间显示出明显的差异,它们在天空中的投影距离仅为0.33pc。我们确定这种材料的一部分,以前已知的HCN映射的环核盘向内延伸。氢离子化率ψ和路径长度L乘积的下限分别为2.3× 105 cm s-1和1.5× 103 cm s-1,对于温暖和弥漫的CMZ气体和温暖和稠密的核心云。这些极限表明,这些区域的电离率远高于10− 15 s− 1。
We have obtained improved spectra of key fundamental band lines of H+ 3, R (1, 1) l, R (3, 3) l, and R (2, 2) l, and ro-vibrational transitions of CO on sightlines toward the luminous infrared sources GCIRS 3 and GCIRS 1W, each located in the Central Cluster of the Galactic center within several arcseconds of Sgr A*. The spectra reveal absorption occurring in three kinds of gaseous environments:(1) cold dense and diffuse gas associated with foreground spiral/lateral arms;(2) warm and diffuse gas absorbing over a wide and mostly negative velocity range, which appears to fill a significant fraction of the Galaxy’s Central Molecular Zone (CMZ); and (3) warm, dense and compact clouds with velocities near+ 50 km s− 1 probably within 1–2 pc of the center. The absorptions by the first two cloud types are nearly identical for all the sources in the Central Cluster, and are similar to those previously observed on sightlines from Sgr A* to 30 pc east of it. Cloud type (3), which has only been observed toward the Central Cluster, shows distinct differences between the sightlines to GCIRS 3 and GCIRS 1W, which are separated on the sky by only 0.33 pc in projection. We identify this material as part of an inward extension of the circumnuclear disk previously known from HCN mapping. Lower limits on the products of the hydrogen ionization rate ζ and the path length L are 2.3× 105 cm s− 1 and 1.5× 103 cm s− 1 for the warm and diffuse CMZ gas and for the warm and dense clouds in the core, respectively. The limits indicate that the ionization rates in these regions are well above 10− 15 s− 1.
DOI: 10.1088/2041-8205/769/1/l13
发表时间: 2013-05
期刊: The Astrophysical Journal Letters
影响因子: --
作者:
J. Goicoechea;M. Etxaluze;J. Cernicharo;M. Gerin;D. Neufeld;A. Contursi;T. Bell;M. de Luca;P. Encrenaz;N. Indriolo;D. Lis;E. Polehampton;P. Sonnentrucker
通讯作者: J. Goicoechea;M. Etxaluze;J. Cernicharo;M. Gerin;D. Neufeld;A. Contursi;T. Bell;M. de Luca;P. Encrenaz;N. Indriolo;D. Lis;E. Polehampton;P. Sonnentrucker
DOI: --
发表时间: 1991
期刊: --
影响因子: --
作者:
A. Haschick;P. Ho
通讯作者: A. Haschick;P. Ho
银河系中心尘埃嵌入源的 M 波段光谱
DOI: 10.1088/0004-637x/703/2/1635
发表时间: 2009
期刊: The Astrophysical Journal
影响因子: --
作者:
J. Moultaka;A. Eckart;R. Schödel
通讯作者: R. Schödel
稠密分子云中 H3 的观测
DOI: 10.1086/307637
发表时间: 1999
期刊: The Astrophysical Journal
影响因子: --
作者:
B. McCall;T. Geballe;K. Hinkle;T. Oka
通讯作者: T. Oka
DOI: --
发表时间: 1995
期刊:
影响因子: --
作者:
T. J. Sodroski;N. Odegard;E. Dwek;M. Hauser;B. Franz;I. Freedman;T. Kelsall;W. Wall;G. Berriman;S. Odenwald;C. Bennett;W. Reach;J. Weiland
通讯作者: J. Weiland