X-ray emission from the Sculptor galaxy NGC 300

被引:31
作者
Read, AM [1 ]
Pietsch, W [1 ]
机构
[1] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany
关键词
galaxies : clusters : sculptor; galaxies : individual : NGC 300; galaxies : ISM; galaxies : spiral; X-rays : galaxies;
D O I
10.1051/0004-6361:20010636
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report here the results of a full analysis of all the ROSAT PSPC spectral imaging observations and all the ROSAT HRI high resolution imaging observations of the very nearby (D = 2.1 Mpc) Sculptor galaxy, NGC 300. Many point sources are detected within the field, several of them showing evidence for variability, and we present full source lists detailing their X-ray properties, and attempt to classify them on the basis of their temporal, spectral and multi-wavelength characteristics. A black hole X-ray binary candidate, a supersoft source and several supernova remnants and H II regions are detected in X-rays, as is unresolved, possibly diffuse emission, accounting for perhaps similar to 20% of the total NGC 300 X-ray (0.1-2.4 keV) luminosity (5.8 x 10(38) erg s(-1)). We compare the X-ray source luminosity distribution of NGC 300 with that of other nearby galaxies, and we also compare NGC 300 with its Sculptor neighbours, concluding that it is a quite an unremarkable system, showing no unusual X-ray (or other multi-wavelength) properties. It may be one of the best examples of a completely typical normal quiescent late-type spiral galaxy.
引用
收藏
页码:473 / 484
页数:12
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