J/ApJ/793/134ivo://CDS.VizieR/J/ApJ/793/134doi:10.26093/cds/vizier.17930134CDSLee J.H.Lee M.G.2017-09-19T10:34:40Z2017-05-12T15:56:30ZCDS support team

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

cds-question@unistra.frgalaxiessupernova-remnantsstellar-radiivisible-astronomyh-alpha-photometryNarrowband images covering strong emission lines are efficient for surveying supernova remnants (SNRs) in nearby galaxies. Using the narrowband images provided by the Local Group Galaxy Survey, we searched for SNRs in M33. Culling the objects with enhanced [S II]/H{alpha} and round morphology in the continuum-subtracted H{alpha} and [S II] images, we produced a list of 199 sources. Among them, 79 are previously unknown. Their progenitor and morphology types were classified. A majority of the sample (170 objects) are likely remnants of core-collapse supernovae (SNe), and 29 are remnants of Type Ia SNe. The cumulative size distribution of these objects is found to be similar to that of the M31 remnants derived in a similar way. We obtain a power-law slope, {alpha}=2.38+/-0.05. Thus, a majority of the sources are considered to be in the Sedov-Taylor phase, consistent with previous findings. The histogram of the emission-line ratio ([S II]/H{alpha}) of the remnants has two concentrations at [S II]/H{alpha} ~0.55 and ~0.8, as in M31. Interestingly, L_X_(and L_20 cm_) of the compact center-bright objects are correlated with their optical luminosity. The remnants with X-ray emission have brighter optical surface brightnesses and smaller diameters than those without X-ray emission.2014ApJ...793..134Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/793/134CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/272 : A catalogue of Galactic supernova remnants (Green, 2014)J/ApJ/703/370 : Radio SNRs in nearby galaxies (Chomiuk+, 2009)J/ApJS/187/495 : SNRs in M33 from optical and X-ray (Long+, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/793/134https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/793/134http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/793/134https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/793/134https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/793/134http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/793/134GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/793/134/table3 (A List of M33 SNR Candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/793/134/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/793/134/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/793/134/table3?GETtext/xml+votable180.050000true23.107404730.501121940.005555555555555556Cone search capability for table J/ApJ/793/134/table1 (A List of Previous M33 SNR Candidates Excluded in This Study)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/793/134/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/793/134/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/793/134/table1?GETtext/xml+votable180.050000true23.126277930.4628050.0055555555555555566/2154 2155 2241https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/793/134?format=asciiOpticaldefaultJ/ApJ/793/134/table3A List of M33 SNR CandidatesComComments (G3)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/199] Index numbermeta.id;meta.mainintRAJ2000Right Ascension in decimal degrees (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (G1)degpos.eq.dec;meta.mainlogLHaLog of H{alpha} luminosity; erg/s (G2)log(1e-07W)phys.luminosity;em.line.HalphafloatlogLSIILog of [S II] luminosity; erg/s (G2)log(1e-07W)phys.luminosityfloatDiamDiameter calculated using 1''=3.88 pc (3)pcphys.size.diameterintRatioRatio of [S II] to H{alpha}phys.luminosity;arith.ratiofloatMorphMorphology type (C,A1,A2,A3,B1,B2,B3)src.morph.typecharN(OB)Number of OB stars (4)meta.numberintPTypeProgenitor type (CC,Ia)meta.codecharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/793/134/table1A List of Previous M33 SNR Candidates Excluded in This StudyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource identifier ([LBW2010] NNN in Simbad) (G3)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (G1)degpos.eq.dec;meta.mainlogLHaLog of H{alpha} luminosity; erg/s (G2)log(1e-07W)phys.luminosity;em.line.HalphafloatlogLSIILog of [S II] luminosity; erg/s (G2)log(1e-07W)phys.luminosityfloatDiamDiameter calculated using 1''=3.88 pcpcphys.size.diameterintRatioRatio of [S II] to H{alpha}phys.luminosity;arith.ratiofloatClass[HS] Classification (3)meta.code.classcharSimbadSimbad column added by the CDSmeta.ref.urlchar