J/MNRAS/439/354ivo://CDS.VizieR/J/MNRAS/439/354doi:10.26093/cds/vizier.74390354CDSBedin L.R.Ruiz-Lapuente P.Gonzalez Hernandez J.I.Canal R.,Filippenko A.V.Mendez J.2024-08-08T20:12:49Z2014-12-17T13:41:57ZCDS support team

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

cds-question@unistra.frsupernova-remnantsmultiple-starsproper-motionsradial-velocityWith archival and new Hubble Space Telescope observations, we have refined the space-velocity measurements of the stars in the central region of the remnant of Tycho's supernova (SN) 1572, one of the historical Galactic Type Ia supernova remnants (SNRs). We derived a proper motion for Tycho-G of (pmRAcosDE;pmDE) J2000.0 =(-2.63;,-3.98)+/-(0.06;,0.04)[formal errors] +/-(0.18;0.10)[expected errors]mas/yr. If the star were at the distance of the SNR (taken here to be 2.83kpc), its velocity would be V_b_=-51+/-1.5km/s. We also reconstruct the binary orbit that Tycho-G should have followed if it were the surviving companion of SN 1572. We redetermine the Ni abundance of this star and compare it with new abundance data from stars of the Galactic disc, finding that [Ni/Fe] is about 1.7{sigma} above the Galactic trend. From the high velocity of Tycho-G perpendicular to the Galactic plane (-90+/-3km/s<=V_b_<=-45+/-1km/s, for the allowed range of distances to the star), its metallicity and its Ni excess, we find the probability of it being a chance interloper to be P<~0.00037 at most. The projected rotational velocity of the star should be below current observational limits. The projected position of Tycho-G is, within the uncertainties, consistent with the centroid of the X-ray emission of Tycho's SNR; moreover, its brightness is generally consistent with the post-explosion evolution of the luminosity of an SN companion. Among the other 23 stars having V<22mag and located within 42-arcsec from the X-ray centroid, only 4 are at distances compatible with that of the SNR, and none of them shows any peculiarity. Therefore, if even Tycho-G is not the surviving companion of SN 1572, the absence of other viable candidates does favour the merging of two white dwarfs as the producer of the SN.2014MNRAS.439..354Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/439/354CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/439/354https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/439/354http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/439/354https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/439/354https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/439/354http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/439/354GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/439/354/catalog (Our catalogue for the sources in common with those in P04 (related to Ruiz-Lapuente et al., 2004Natur.431.1069R) (table 2 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/439/354/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/439/354/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/439/354/catalog?GETtext/xml+votable180.050000true6.3999833364.098988890.005555555555555556Cone search capability for table J/MNRAS/439/354/table3 (Data for the 24 stars with mV<=22mag, located within 42 arcsec from the Xray centroid of Tycho's SNR)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/439/354/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/439/354/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/439/354/table3?GETtext/xml+votable180.050000true6.332166764.13888890.0055555555555555566/3063https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/439/354?format=asciiOpticaldefaultJ/MNRAS/439/354/catalogOur catalogue for the sources in common with those in P04 (related to Ruiz-Lapuente et al., 2004Natur.431.1069R) (table 2 of the paper)ID[1/1148] Sequential numbermeta.recordintprimaryXposX positionpixpos.cartesian.x;instr.detdoubleYposY positionpixpos.cartesian.y;instr.detdoubleRAJ2000Right ascension (J2000, Ep=2011.858)pos.eq.ra;meta.mainDEJ2000Declination (J2000, Ep=2011.858)pos.eq.dec;meta.mainpmRA? Proper motion along RA (pmRA*cosDE)mas/yrpos.pm;pos.eq.radoublenullablee_pmRA? rms uncertainty on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatnullableRAo? Correction to be applied to our reference-frame RA at epoch 2011.858 (1)maspos.eq.ra;arith.diffnullablee_RAo? rms uncertainty on RAomasstat.errorfloatnullablepmDE? Proper motion along DEmas/yrpos.pm;pos.eq.decfloatnullablee_pmDE? rms uncertainty on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatnullableDEo? Correction to be applied to our reference-frame DE at epoch 2011.858maspos.eq.dec;arith.diffnullablee_DEo? rms uncertainty on DEo (1)masstat.errorfloatnullableef[1/4] Number of epochs usedmeta.numberintNu[0/72] number of neighbouring stars used to derive the boresight correctionsmeta.numberintStarP04 name (<[RCM2004] Tycho AN> in Simbad)meta.idcharJ/MNRAS/439/354/table3Data for the 24 stars with mV<=22mag, located within 42 arcsec from the Xray centroid of Tycho's SNRrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarP04 name <[RCM2004] Tycho AN> in Simbadmeta.id;meta.maincharBmag? B magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag? rms uncertainty on Bmagmagstat.error;phot.mag;em.opt.BfloatnullableVmag? V magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag? rms uncertainty on Vmagmagstat.error;phot.mag;em.opt.VfloatnullableRmag? R magnitudemagphot.mag;em.opt.Rfloatnullablee_Rmag? rms uncertainty on Rmagmagstat.error;phot.mag;em.opt.RfloatnullablepmbProper motion perpendicular to the Galactic planemas/yrpos.pmfloate_pmbrms uncertainty on pmbmas/yrstat.errorfloatl_Dist[~>=< ] Limit flag on Distmeta.code.errorcharDistDistancekpcpos.distance;pos.heliocentricfloate_Dist? rms uncertainty on Distkpcstat.errorfloatnullablen_Dist[-/] - for interval, / for second valuemeta.notecharl_Dist2[~] Limit flag on Dist2meta.code.errorcharDist2? Upper value of distance when interval or second distance valuekpcpos.distance;pos.heliocentricfloatnullableRV? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RV? rms uncertainty on RVkm/sstat.errorfloatnullablel_VRA[~>=< ] Limit flag on VRAmeta.code.errorcharVRATangential velocity component along RAkm/sphys.velocfloate_VRA? rms uncertainty on VRAkm/sstat.errorfloatnullablen_VRA[-/] - for interval, / for second valuemeta.notecharl_VRA2[~] Limit flag on VRA2meta.code.errorcharVRA2? Upper value of VRA when interval or second VRA valuekm/sphys.velocintnullablel_VDE[~>=< ] Limit flag on VDEmeta.code.errorcharVDETangential velocity component along DEkm/sphys.velocfloate_VDE? rms uncertainty on VDEkm/sstat.errorfloatnullablen_VDE[-/] - for interval, / for second valuemeta.notecharl_VDE2[~] Limit flag on VDE2meta.code.errorcharVDE2? Upper value of VDE when interval or second VDE valuekm/sphys.velocintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RASimbad column added by the CDSdegpos.eq.ra;meta.main_DESimbad column added by the CDSdegpos.eq.dec;meta.main