A survey of compact radio sources in NGC 6946

被引：45

作者：

Lacey, C ^{[1
]}

Duric, N ^{[1
]}

Goss, WM ^{[1
]}

机构：

[1] NATL RADIO ASTRON OBSERV,SOCORRO,NM 87801

来源：

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 1997年 / 109卷 / 02期

关键词：

galaxies; individual; (NGC; 6946); ISM; spiral; radio continuum; supernova remnants; surveys;

D O I：

10.1086/312989

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report observational results of a VLA 20 cm and 6 cm survey of the nearby spiral galaxy NGC 6946. The purpose of the survey is to identify compact radio sources in NGC 6946. We report the detection of 118 such sources. Using the spectral index to discriminate between thermal and nonthermal emission, 37 candidate sources have been identified as possible supernova remnants or background objects, 31 candidate sources have been identified as possible H II regions, and six sources have been identified with inverted spectra. The remaining sources were detected only at 20 cm. A catalog summarizing the properties of the radio sources is presented. The source positions, flux densities, and spectral indices are listed in the catalog. An atlas consisting of contour maps of all detected sources is presented.

引用

页码：417 / 460

页数：44

共 38 条

[1] THE OPTICAL COUNTERPART TO THE LUMINOUS X-RAY SUPERNOVA REMNANT IN NGC-6946 [J].