THE INTERSTELLAR TUNNEL OF NEUTRAL-FREE GAS TOWARD BETA-CANIS MAJORIS

被引：68

作者：

WELSH, BY

机构：

[1] Center for EUV Astrophysics, University of California, Berkeley

来源：

ASTROPHYSICAL JOURNAL | 1991年 / 373卷 / 02期

关键词：

INTERSTELLAR; MATTER; STARS; INDIVIDUAL (BETA-CANIS MAJORIS);

D O I：

10.1086/170074

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using high-resolution sodium absorption observations of early-type stars to determine the distribution of neutral interstellar gas in the direction of the star beta CMa, we have mapped the contours of a large feature in the local interstellar medium, some 50 pc in diameter and 300 pc long, that appears to be virtually free of neutral gas. This rarefied "interstellar tunnel" is an extension of a region of very low gas density surrounding the Sun called the Local Bubble, which may well have been formed by the interaction of expanding interstellar cavities produced by multiple supernova events. This large region of unusually low gas density will be a prime area for study in the soft X-ray and EUV spectral regions.

引用

页码：556 / 559

页数：4

共 21 条

[1] SURVEY OF INTER-STELLAR H-I FROM L-ALPHA ABSORPTION-MEASUREMENTS .2. [J].