CAVITY OF MOLECULAR GAS ASSOCIATED WITH SUPERNOVA REMNANT 3C 397

被引:117
作者
Jiang, Bing [1 ]
Chen, Yang [1 ,2 ]
Wang, Junzhi [1 ,2 ]
Su, Yang [3 ]
Zhou, Xin [1 ]
Safi-Harb, Samar [4 ]
DeLaney, Tracey [5 ]
机构
[1] Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Peoples R China
[3] Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
[4] Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada
[5] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA
基金
加拿大自然科学与工程研究理事会;
关键词
ISM: individual objects (3C 397 (G41.1-0.3)); ISM: molecules; ISM: supernova remnants; GAMMA-RAY EMISSION; MHZ MASER EMISSION; PULSAR-WIND NEBULA; X-RAY; GALACTIC-CENTER; STAR-FORMATION; IC; 443; H-I; ABSORPTION-MEASUREMENTS; INFRARED-SPECTROSCOPY;
D O I
10.1088/0004-637X/712/2/1147
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
3C 397 is a radio and X-ray bright Galactic supernova remnant (SNR) with an unusual rectangular morphology. Our CO observation obtained with the Purple Mountain Observatory at Delingha, Qinghai Province, China reveals that the remnant is well confined in a cavity of molecular gas and embedded at the edge of a molecular cloud (MC) at the local standard of rest systemic velocity of similar to 32 km s(-1). The cloud has a column density gradient increasing from southeast to northwest, perpendicular to the Galactic plane, in agreement with the elongation direction of the remnant. This systemic velocity places the cloud and SNR 3C 397 at a kinematic distance of similar to 10.3 kpc. The derived mean molecular density (similar to 10-30 cm(-3)) explains the high volume emission measure of the X-ray emitting gas. A (CO)-C-12 line broadening of the similar to 32 km s(-1) component is detected at the westmost boundary of the remnant, which provides direct evidence of the SNR MC interaction and suggests multi-component gas there with dense (similar to 10(4) cm(-3)) molecular clumps. We confirm the previous detection of an MC at similar to 38 km s(-1) to the west and south of the SNR and argue, based on H I self-absorption, that the cloud is located in the foreground of the remnant. A list of Galactic SNRs presently known and suggested to be in physical contact with environmental MCs is appended in this paper.
引用
收藏
页码:1147 / 1156
页数:10
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