NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-10-18 T12:45:02 PDT
Help | Comment | NED Home

For refcode 2014ApJ...786..130L:
Retrieve 314 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2014ApJ...786..130L A New Optical Survey of Supernova Remnant Candidates in M31 Lee, Jong Hwan; Lee, Myung Gyoon Abstract. We present a survey of optically emitting supernova remnants (SNRs) in M31 based on Halpha and [S II] images in the Local Group Survey. Using these images, we select objects that have [S II]:Halpha > 0.4 and circular shapes. We identify 156 SNR candidates, of which 76 are newly found objects. We classify these SNR candidates according to two criteria: the SNR progenitor type (Type Ia and core-collapse (CC) SNRs) and the morphological type. Type Ia and CC SNR candidates make up 23% and 77%, respectively, of the total sample. Most of the CC SNR candidates are concentrated in the spiral arms, while the Type Ia SNR candidates are rather distributed over the entire galaxy, including the inner region. The CC SNR candidates are brighter in Halpha and [S II] than the Type Ia SNR candidates. We derive a cumulative size distribution of the SNR candidates, finding that the distribution of the candidates with 17 <D < 50 pc is fitted well by a power law with the power-law index {alpha} = 2.53 +/- 0.04. This indicates that most of the SNR candidates identified in this study appear to be in the Sedov-Taylor phase. The [S II]:Halpha distribution of the SNR candidates is bimodal, with peaks at [S II]:Halpha ~ 0.4 and ~0.9. The properties of these SNR candidates vary little with the galactocentric distance. The Halpha and [S II] surface brightnesses show a good correlation with the X-ray luminosity of the SNR candidates that are center-bright. Key words: galaxies: individual: M31, galaxies: ISM, ISM: supernova remnants
Retrieve 314 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home