THE CHANDRA LOCAL VOLUME SURVEY. I. THE X-RAY POINT SOURCE POPULATIONS OF NGC 55, NGC 2403, AND NGC 4214

被引:18
|
作者
Binder, B. [1 ]
Williams, B. F. [1 ]
Eracleous, M. [2 ,3 ]
Plucinsky, P. P. [4 ]
Gaetz, T. J. [4 ]
Anderson, S. F. [1 ]
Skillman, E. D. [5 ]
Dalcanton, J. J. [1 ]
Kong, A. K. H. [6 ,7 ]
Weisz, D. R. [1 ]
机构
[1] Univ Washington, Dept Astron, Seattle, WA 98195 USA
[2] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
[3] Penn State Univ, Ctr Gravitat Wave Phys, University Pk, PA 16802 USA
[4] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[5] Univ Minnesota, Dept Astron, Minneapolis, MN 55455 USA
[6] Natl Tsing Hua Univ, Inst Astron, Hsinchu 30013, Taiwan
[7] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan
来源
ASTRONOMICAL JOURNAL | 2015年 / 150卷 / 03期
关键词
galaxies:; individual; (NGC; 55; NGC; 2403; 4214); surveys; X-rays: binaries; X-rays: galaxies; XMM-NEWTON OBSERVATIONS; NEARBY SPIRAL-GALAXIES; SCULPTOR GROUP GALAXIES; HUBBLE-SPACE-TELESCOPE; SMALL-MAGELLANIC-CLOUD; ALL-SKY SURVEY; YOUNG STELLAR POPULATION; STAR-FORMATION HISTORY; DIFFUSE IONIZED-GAS; LUMINOSITY FUNCTION;
D O I
10.1088/0004-6256/150/3/94
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present comprehensive X-ray point source catalogs of NGC 55, NGC 2403, and NGC 4214 as part of the Chandra Local Volume Survey. The combined archival observations have effective exposure times of 56.5 ks, 190 ks, and 79 ks for NGC 55, NGC 2403, and NGC 4214, respectively. When combined with our published catalogs for NGC 300 and NGC 404, our survey contains 629 X-ray sources total down to a limiting unabsorbed luminosity of similar to 5 x 10(35) erg s(-1) in the 0.35-8 keV band in each of the five galaxies. We present X-ray hardness ratios, spectral analysis, radial source distributions, and an analysis of the temporal variability for the X-ray sources detected at high significance. To constrain the nature of each X-ray source, we carried out cross-correlations with multi-wavelength data sets. We searched overlapping Hubble Space Telescope observations for optical counterparts to our X-ray detections to provide preliminary classifications for each X-ray source as a likely X-ray binary, background active galactic nucleus, supernova remnant, or foreground star.
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页数:34
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