J/ApJS/174/379ivo://CDS.VizieR/J/ApJS/174/379doi:10.26093/cds/vizier.21740379CDSFesen R.Rudie G.Hurford A.Soto A.2009-10-23T13:26:25Z2009-10-23T13:18:47ZCDS support team

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

cds-question@unistra.frspectroscopysupernova-remnantsinterstellar-mediumWe present a comprehensive imaging and spectroscopic survey of optical emission knots associated with the young Galactic supernova remnant 3C 58. H{alpha} images show hundreds of clumpy filaments and knots arranged in a complex structure covering a nearly circular area roughly 400" in diameter. A quite different emission structure is seen in [OIII], where the brightest features are less clumpy and largely confined to the remnant's northwest quadrant. Measured radial velocities of over 450 knots reveal two distinct kinematic populations; one with average and peak expansion velocities of 770 and 1100km/s, respectively, forming a thick shell, and the other showing |v|<=250km/s. High-velocity knots (|v|>=500km/s) exhibit a strong bipolar expansion pattern with redshifted and blueshifted knots located in northeastern and southwestern regions, respectively. These knots also show strong [NII]/H{alpha} line emission ratios, suggesting enhanced N/H. In contrast, the slower expanding knot population shows much lower [NII]/H{alpha} line ratios and likely represents circumstellar mass loss material from the 3C 58 progenitor. Proper-motion estimates using images spanning a 28yr time interval suggest positional shifts of between 0.5" and 2.0", implying proper motions of 0.02-0.07"/yr. These values agree with previous estimates but are much less than the ~0.2"/yr expected if 3C 58 were associated with historic guest star of 1181 CE.2008ApJS..174..379Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/174/379CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/15 : Galactic Supernova Remnants Catalogue (Ilovaisky+ 1972)VII/14 : Galactic Supernova Remnants Catalogue (Clark+ 1976)VII/253 : A Catalogue of Galactic Supernova Remnants (Green, 2009)J/ApJS/179/195 : A catalogue of outer ejecta knots in Cas A (Hammell+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/174/379https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/174/379http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/174/379https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/174/379https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/174/379http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/174/379GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/174/379/table2 (Observed emission knots in 3C 58)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/174/379/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/174/379/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/174/379/table2?GETtext/xml+votable180.050000true31.435916764.86316670.0055555555555555566/3681https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/174/379?format=asciiOpticaldefaultJ/ApJS/174/379/table2Observed emission knots in 3C 58RVRadial velocitykm/sspect.dopplerVeloc;pos.heliocentricintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[FRH2008]Knot identification (NAaa)meta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainxRelative x offset (1)arcsecpos.eq.ra;arith.difffloatyRelative y offset (1)arcsecpos.eq.dec;arith.difffloatrRadial distance (1)arcsecphys.angSizefloatFHa? Integrated H{alpha} fluxmW.m**-2phot.flux;em.line.HalphafloatnullableNII/Ha? [NII]/H{alpha} ratiophot.flux;arith.ratiofloatnullableSIIr? [SII]{lambda}6716/S[II]{lambda}6731 ratiophot.flux;arith.ratiofloatnullableOI/Ha? [OI]{lambda}6300/H{alpha} ratiophot.flux;arith.ratiofloatnullableSII/Ha? [SII]/H{alpha} ratiophot.flux;arith.ratiofloatnullableOIII/Ha? [OIII]{lambda}5007/H{alpha} ratiophot.flux;arith.ratiofloatnullable