X-RAY SPECTROSCOPY OF POTENTIAL SMALL MAGELLANIC CLOUD TYPE Ia SUPERNOVA REMNANTS AND THEIR ENVIRONMENTS

被引：11

作者：

Roper, Q. ^{[1
]}

McEntaffer, R. L. ^{[1
]}

DeRoo, C. ^{[1
]}

Filipovic, M. ^{[2
]}

Wong, G. F. ^{[2
]}

Crawford, E. J. ^{[2
]}

机构：

[1] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA

[2] Univ Western Sydney, Penrith, NSW 1797, Australia

来源：

ASTROPHYSICAL JOURNAL | 2015年 / 803卷 / 02期

关键词：

ISM: individual objects (IKT 25; IKT; 5; DEM S 128); ISM: supernova remnants; methods: statistical; ATCA RADIO-CONTINUUM; LIKELIHOOD RATIO; ATOMIC DATA; SPECTRUM; REGION; EJECTA; STARS;

D O I：

10.1088/0004-637X/803/2/106

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We examine three supernova remnants in the SMC, IKT 5 (supernova remnant (SNR) 0047-73.5), IKT 25 (SNR 0104-72.3), and DEM S 128 (SNR 0103-72.4), which are designated as Type Ia in the literature due to their spectra and morphology. This is troublesome because of their asymmetry, a trait not usually associated with young Type Ia remnants. We present Chandra X-ray Observatory data on these three remnants. and perform a maximum likelihood analysis on their spectra. We find that the X-ray emission is dominated by interactions with the interstellar medium. In spite of this, we find a significant Fe overabundance in all three remnants. Through examination of radio, optical, and infrared data, we conclude that these three remnants are likely not Type Ia SNRs. We detect potential point sources that may be members of the progenitor systems of both DEM S 128 and IKT 5, which could suggest these could be Fe-rich core-collapse remnants.

引用

页数：14