J/ApJ/866/139ivo://CDS.VizieR/J/ApJ/866/139doi:10.26093/cds/vizier.18660139CDSKoo B.-C.Kim H.-J.Lee Y.-H.Raymond J.C.Lee J.-J.Yoon S.-C.,Moon D.-S.2019-10-30T14:54:39Z2019-10-30T15:39:48ZCDS support team

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

cds-question@unistra.frinterstellar-mediumsupernova-remnantsproper-motionsinfrared-sourcesastronomical-object-identificationvisible-astronomyradial-velocityWe present a long-exposure (~10hr), narrowband image of the supernova (SN) remnant Cassiopeia A (Cas A) centered at 1.644{mu}m emission. The passband contains [FeII] 1.644{mu}m and [SiI] 1.645{mu}m lines, and our "deep [FeII]+[SiI] image" provides an unprecedented panoramic view of Cas A, showing both shocked and unshocked SN ejecta, together with shocked circumstellar medium at subarcsecond (~0.7" or 0.012pc) resolution. The diffuse emission from the unshocked SN ejecta has a form of clumps, filaments, and arcs, and their spatial distribution correlates well with that of the Spitzer [SiII] infrared emission, suggesting that the emission is likely due to [SiI] not [FeII] as in shocked material. The structure of the optically invisible western area of Cas A is clearly seen for the first time. The area is filled with many quasi-stationary flocculi (QSFs) and fragments of the disrupted ejecta shell. We identified 309 knots in the deep [FeII]+[SiI] image and classified them into QSFs and fast-moving knots (FMKs). The comparison with previous optical plates indicates that the lifetime of most QSFs is >~60yr. The total H+He mass of QSFs is ~0.23M_{sun}_, implying that the mass fraction of dense clumps in the progenitor's mass ejection immediately prior to the SN explosion is about 4%-6%. FMKs in the deep [FeII]+[SiI] image mostly correspond to S-rich ejecta knots in optical studies, while those outside the southeastern disrupted ejecta shell appear Fe-rich. The mass of the [FeII] line emitting, shocked dense Fe ejecta is ~3x10^-5^M_{sun}_.2018ApJ...866..139Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/866/139CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/456/234 : Cas A radio knots spectral indices (Anderson+ 1996)J/A+A/368/267 : Spatially resolved spectroscopy of Cas A (Maccarone+, 2001)J/ApJ/613/343 : Cas A knot and filament proper motions (Delaney+, 2004)J/A+A/475/765 : Fine structure forbidden lines in FeII (Ramsbottom+, 2007)J/ApJS/179/195 : A catalog of outer ejecta knots in Cas A (Hammell+, 2008)J/A+A/536/A74 : FeII forbidden lines radiative transition rates (Deb+, 2011)J/A+A/548/A79 : INTEGRAL-OMC optically var. sources (Alfonso-Garzon+, 2012)J/ApJ/837/118 : NIR knots in the Cas A supernova remnant (Lee+, 2017)J/A+A/612/A110 : Cas A LOFAR and VLA images (Arias+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/866/139https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/866/139http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/866/139https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/866/139https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/866/139http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/866/139GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/866/139/table2 (*Quasi-stationary flocculi (QSFs) with optical counterparts)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/866/139/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/866/139/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/866/139/table2?GETtext/xml+votable180.050000true350.85567558.785408330.005555555555555556Cone search capability for table J/ApJ/866/139/table1 (Catalog of knots in the deep [FeII]+[SiI] image)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/866/139/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/866/139/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/866/139/table1?GETtext/xml+votable180.050000true350.85567558.785408330.0055555555555555566/14285https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/866/139?format=asciiInfraredOpticaldefaultJ/ApJ/866/139/table2*Quasi-stationary flocculi (QSFs) with optical counterpartsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/306] Knot identifiermeta.id;meta.mainintf_Seq[ac] Flag on Seq (1)meta.codecharRAJ2000Hour of right ascension (J2000) (2)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000) (2)pos.eq.dec;meta.mainA14Optical identifier from Alarie+ 2014MNRAS.441.2996A (3)meta.id.crosscharRVA14[-448/107]? Radial velocity from A14km/sphys.veloc;pos.heliocentricintnullablef_RVA14[b] Flag on RVA14meta.codechare_RVA14[2/58]? RVA14 uncertaintykm/sstat.errorintnullableV85Optical identifier from van den Bergh+ 1985ApJ...293..537V (4)meta.id.crosscharpmV85[0/0.2]? Proper motion {mu} from V85arcsec/yrpos.pmfloatnullableRVV85[-340/432]? Radial velocity from V85km/sphys.veloc;pos.heliocentricintnullableJ/ApJ/866/139/table1Catalog of knots in the deep [FeII]+[SiI] imagerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/309] Running sequence numbermeta.id;meta.mainintprimaryf_Seq[a-es] Flag on Seq (1)meta.codecharRAJ2000[23] Hour of Right Ascension (J2000) (2)pos.eq.ra;meta.mainDEJ2000[58] Degree of Declination (J2000) (2)pos.eq.dec;meta.mainamaj[0.6/24] Major axis from ellipse fitting (D_max_)arcsecphys.angSizefloatbmin[0.3/6.5] Minor axis from ellipse fitting (D_min_)arcsecphys.angSize;srcfloatPA[0/177] Position angle of major axis ({psi}_ellipse_) (3)degpos.posAngintArea[0.2/60.5] Area measured from contoursarcsec**2phys.areafloatFobsObserved flux; erg/s/cm^2^mW.m**-2phot.fluxcharFcorExtinction corrected flux; erg/s/cm^2^mW.m**-2phot.fluxcharpm[0/0.8]? Proper motion ({mu})arcsec/yrpos.pmfloatnullabletheta[-179/180]? Position angle of proper motion ({theta}_{mu}_) (3)degpos.pm;pos.posAngfloatnullableClassKnot classification (4)meta.code.classcharf_Class[o] Flag on Class (5)meta.codechar