J/ApJ/786/130ivo://CDS.VizieR/J/ApJ/786/130doi:10.26093/cds/vizier.17860130CDSLee J.H.Lee M.G.2018-01-10T05:31:38Z2017-07-13T14:50:19ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxiessupernova-remnantsvisible-astronomyh-alpha-photometrystellar-radiigalaxy-classification-systemsob-starsh-ii-regionsWe present a survey of optically emitting supernova remnants (SNRs) in M31 based on H{alpha} and [S II] images in the Local Group Survey. Using these images, we select objects that have [S II]:H{alpha}>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 H{alpha} 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]:H{alpha} distribution of the SNR candidates is bimodal, with peaks at [S II]:H{alpha}~0.4 and~0.9. The properties of these SNR candidates vary little with the galactocentric distance. The H{alpha} and [S II] surface brightnesses show a good correlation with the X-ray luminosity of the SNR candidates that are center-bright.2014ApJ...786..130Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/786/130CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/114/215 : New SNR candidates in M31 (Magnier+, 1995)J/AJ/131/2478 : M31 and M33 UBVRI photometry (Massey+, 2006)J/ApJ/795/170 : Sample SNRs for M31 and M33 (Jennings+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/786/130https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/786/130http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/786/130https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/786/130https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/786/130http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/786/130GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/786/130/table1 (A Catalog of Previous M31 SNR Candidates Rejected in This Study)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/786/130/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/786/130/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/786/130/table1?GETtext/xml+votable180.050000true10.279877741.071918060.005555555555555556Cone search capability for table J/ApJ/786/130/table3 (A Catalog of M31 SNR Candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/786/130/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/786/130/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/786/130/table3?GETtext/xml+votable180.050000true9.405679739.862778060.0055555555555555566/2619 2622 2623 2666 2705 2708 2709 2752https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/786/130?format=asciiOpticaldefaultJ/ApJ/786/130/table1A Catalog of Previous M31 SNR Candidates Rejected in This StudyClassClassification (1)meta.code.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource identifier (G1)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000) (G2)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (G2)degpos.eq.dec;meta.mainlogLHaLog of H{alpha} luminosity; erg/s (G3)log(1e-07W)phys.luminosity;em.line.HalphafloatlogLSIILog of [S II] luminosity; erg/s (G3)log(1e-07W)phys.luminosityfloatDiaDiameter calculated using 1"=3.63 pcpcphys.size.diameterfloatRatioRatio of [S II] to H{alpha}phys.luminosity;arith.ratiofloatJ/ApJ/786/130/table3A Catalog of M31 SNR CandidatesMorphMorphology type; see textsrc.morph.typecharN(HII)Number of H II regions (3)meta.numberintN(OB)Number of OB stars (2)meta.numberintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/156] Index numbermeta.id;meta.mainintRAJ2000Right Ascension in decimal degrees (J2000) (G2)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (G2)degpos.eq.dec;meta.mainlogLHaLog of H{alpha} luminosity; erg/s (G3)log(1e-07W)phys.luminosity;em.line.HalphafloatlogLSIILog of [S II] luminosity; erg/s (G3)log(1e-07W)phys.luminosityfloatDiaDiameter calculated using 1"=3.63 pc (1)pcphys.size.diameterfloatRatioRatio of [S II] to H{alpha}phys.luminosity;arith.ratiofloatPTypeProgenitor type (4)meta.codecharComComments (G1)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar