J/MNRAS/532/2875ivo://CDS.VizieR/J/MNRAS/532/2875doi:10.26093/cds/vizier.75322875CDSNelson T.Hawkins K.Reggiani H.Garza D.Wyse R.F.G.Woody T.2025-02-12T20:12:12Z2024-10-01T12:47:42ZCDS support team

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

cds-question@unistra.frlate-type-starschemical-abundancesTwo decades on, the study of hypervelocity stars is still in its infancy. These stars can provide novel constraints on the total mass of the Galaxy and its Dark Matter distribution. However how these stars are accelerated to such high velocities is unclear. Various proposed production mechanisms for these stars can be distinguished using chemo-dynamic tagging. The advent of Gaia and other large surveys have provided hundreds of candidate hyper velocity objects to target for ground based high resolution follow-up observations. We conduct high resolution spectroscopic follow-up observations of 16 candidate late-type hyper velocity stars using the Apache Point Observatory and the McDonald Observatory. We derive atmospheric parameters and chemical abundances for these stars. We measure up to 22 elements, including the following nucleosynthetic families: alpha (Mg, Si, Ca, Ti), light/Odd-Z (Na, Al, V, Cu, Sc), Fe-peak (Fe, Cr, Mn, Co, Ni, Zn), and Neutron Capture (Sr, Y, Zr, Ba, La, Nd, Eu). Our kinematic analysis shows one candidate is unbound, two are marginally bound, and the remainder are bound to the Galaxy. Finally, for the three unbound or marginally bound stars, we perform orbit integration to locate possible globular cluster or dwarf galaxy progenitors. We do not find any likely candidate systems for these stars and conclude that the unbound stars are likely from the the stellar halo, in agreement with the chemical results. The remaining bound stars are all chemically consistent with the stellar halo as well.2024MNRAS.532.2875Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/532/2875CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/532/2875https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/532/2875http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/532/2875https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/532/2875https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/532/2875http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/532/2875GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/532/2875/table1 (Observational data gathered for the science program stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/532/2875/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/532/2875/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/532/2875/table1?GETtext/xml+votable180.050000true233.927946.56880.005555555555555556Cone search capability for table J/MNRAS/532/2875/table4 (*Atmospheric parameters and abundances for stars used in this study)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/532/2875/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/532/2875/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/532/2875/table4?GETtext/xml+votable180.050000true148.19087526.00694440.0055555555555555566/4376 4423 4574 4993 7407 9695 9828 9926 9954 10507 10720 11029 11355 15340 15872 18682 21477 21482 21830 22118 22793 26331 26388 26457 26893 27403 27645 28265 30184 31231 32196 32198 32224 32638 409317.952274030004205e-20 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/532/2875?format=asciidefaultJ/MNRAS/532/2875/table1Observational data gathered for the science program starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSRight ascension of star (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainDE_ICRSDeclination of star (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainGaiaDR3Gaia DR3 source idmeta.id;meta.mainNameAlias of star for the programmeta.idcharObsWhich observatory the data was gathered at (McD is McDonald Observatory, APO is Apache Point Observatory)meta.id;obscharDistDistance estimate from the Bailer-Jones et al., (2021AJ....161..147B, Cat. I/352) catalog, using the photogeometric distancespcpos.distanceintGmagGaia G band magnitude from Gaia DR3magphot.mag;em.opt.VfloatRVRadial velocity measurement after barycentric correction (determined using iSpec)km/sphys.veloc;pos.heliocentricfloatRVcorRadial velocity measurement after barycentric correction (determined using iSpec)km/sphys.veloc;pos.barycenterfloatSNRSignal to noise ratio for the datastat.snrintRefSource of the HVS candidate examinedmeta.bibcharJ/MNRAS/532/2875/table2Photometric data used for Isochrones fitting for the science stars in the programrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Gaia DR3 source idmeta.id;meta.mainGmag? Measured Gaia G band photometrymagphot.mag;em.optfloatnullableJmag? Measured J band photometrymagphot.mag;em.IR.Jfloatnullablee_Jmag? Error on the J band photometrymagstat.error;phot.magfloatnullableHmag? Measured H band photometrymagphot.mag;em.IR.Hfloatnullablee_Hmag? Error on the H band photometrymagstat.error;phot.magfloatnullableKsmag? Measured Ks band photometrymagphot.mag;em.IR.Kfloatnullablee_Ksmag? Error on the Ks band photometrymagstat.error;phot.magfloatnullableW1mag? Measured W1 band photometrymagphot.mag;em.IR.3-4umfloatnullablee_W1mag? Error on the W1 band photometrymagstat.error;phot.magfloatnullableW2mag? Measured W2 band photometrymagphot.mag;em.IR.4-8umfloatnullablee_W2mag? Error on the W2 band photometrymagstat.error;phot.magfloatnullableumagSM? Measured SkyMapper u band photometrymagphot.mag;em.opt.Ufloatnullablee_umagSM? Error on the SkyMapper u band photometrymagstat.error;pos.cartesian.xfloatnullablevmagSM? Measured SkyMapper v band photometrymagphot.mag;em.opt.Vfloatnullablee_vmagSM? Error on the SkyMapper v band photometrymagstat.errorfloatnullablegmagSM? Measured SkyMapper g band photometrymagphot.mag;em.opt.Bfloatnullablee_gmagSM? Error on the SkyMapper g band photometrymagstat.errorfloatnullablermagSM? Measured SkyMapper r band photometrymagphot.mag;em.opt.Rfloatnullablee_rmagSM? Error on the SkyMapper r band photometrymagstat.errorfloatnullableimagSM? Measured SkyMapper i band photometrymagphot.mag;em.opt.Ifloatnullablee_imagSM? Error on the SkyMapper i band photometrymagstat.errorfloatnullableymagPS1? Measured PANSTARRs y band photometrymagphot.mag;em.IR.Jfloatnullablee_ymagPS1? Error on the PANSTARRs y band photometrymagstat.error;pos.cartesian.yfloatnullableumag? Measured SDSS u band photometrymagphot.mag;em.opt.Ufloatnullablee_umag? Error on the SDSS u band photometrymagstat.error;phot.magfloatnullablezmag? Measured SDSS z band photometrymagphot.mag;em.opt.Ifloatnullablee_zmag? Error on the SDSS z band photometrymagstat.error;phot.magfloatnullableNameAlias of star for the programmeta.idcharzmagSM? Measured SkyMapper z band photometrymagphot.mag;em.opt.Ifloatnullablee_zmagSM? Error on the SkyMapper z band photometrymagstat.errorfloatnullablegmagPS1? Measured PANSTARRs g band photometrymagphot.mag;em.opt.Bfloatnullablee_gmagPS1? Error on the PANSTARRs g band photometrymagstat.errorfloatnullableJ/MNRAS/532/2875/table3*Atomic Data Used for the LoneStar abundance fitsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameAlias of star for the programmeta.idcharElementElement and Ionization statephys.atmol.element;phys.atmol.ionizationcharlambdaWavelength of atomic transition0.1nmem.wl;phys.atmol.transitiondoubleloggfOscillator strength f multiplied by its statistical weight gstat.weight;phys.atmol.oscStrengthfloatr_loggfBibliographic reference for data from the Gaia ESO line list master tablemeta.ref;pos.framecharxiExcitation potentialeVphys.atmol.excitationfloatlogepsAbsolute abundance after subtracting solar abundances from Grevesse et al., 2007, Space Sci. Rev., 130, 105phys.abunddoubleJ/MNRAS/532/2875/table4*Atmospheric parameters and abundances for stars used in this studyProgramProgram label (1)meta.id;obschar[Ba/Fe]? [Ba/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Y/Fe]? [Y/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Ti/H]? [Ti/H] abundance measurementphys.abunddoublenullablee_[Ti/H]? Error on the [Ti/H] abundance measurementstat.error;phys.abunddoublenullable[Ti/Fe]? [Ti/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Ti/H]LTE? LTE [Ti/H] abundance measurement from LoneStarphys.abunddoublenullable[V/H]? [V/H] abundance measurementphys.abunddoublenullablee_[V/H]? Error on the [V/H] abundance measurementstat.error;phys.abunddoublenullable[V/Fe]? [V/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Cr/H]? [Cr/H] abundance measurementphys.abunddoublenullablee_[Cr/H]? Error on the [Cr/H] abundance measurementstat.error;phys.abunddoublenullable[Cr/Fe]? [Cr/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Mn/H]? [Mn/H] abundance measurementphys.abunddoublenullablee_[Mn/H]? Error on the [Mn/H] abundance measurementstat.error;phys.abunddoublenullable[Mn/Fe]? [Mn/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Mn/H]LTE? LTE [Mn/H] abundance measurement from LoneStarphys.abunddoublenullable[Co/H]? [Co/H] abundance measurementphys.abunddoublenullablee_[Co/H]? Error on the [Co/H] abundance measurementstat.error;phys.abunddoublenullable[Co/Fe]? [Co/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Co/H]LTE? LTE [Co/H] abundance measurement from LoneStarphys.abunddoublenullable[Ni/H]? [Ni/H] abundance measurementphys.abunddoublenullablee_[Ni/H]? Error on the [Ni/H] abundance measurementstat.error;phys.abunddoublenullable[Ni/Fe]? [Ni/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Cu/H]? [Cu/H] abundance measurementphys.abunddoublenullablee_[Cu/H]? Error on the [Cu/H] abundance measurementstat.error;phys.abunddoublenullable[Cu/Fe]? [Cu/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Zn/H]? [Zn/H] abundance measurementphys.abunddoublenullablee_[Zn/H]? Error on the [Zn/H] abundance measurementstat.error;phys.abunddoublenullable[Zn/Fe]? [Zn/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Sr/H]? [Sr/H] abundance measurementphys.abunddoublenullablee_[Sr/H]? Error on the [Sr/H] abundance measurementstat.error;phys.abunddoublenullable[Sr/Fe]? [Sr/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Y/H]? [Y/H] abundance measurementphys.abunddoublenullablee_[Y/H]? Error on the [Y/H] abundance measurementstat.error;phys.abunddoublenullable[Zr/H]? [Zr/H] abundance measurementphys.abunddoublenullablee_[Zr/H]? Error on the [Zr/H] abundance measurementstat.error;phys.abunddoublenullable[Zr/Fe]? [Zr/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Ba/H]? [Ba/H] abundance measurementphys.abunddoublenullablee_[Ba/H]? Error on the [Ba/H] abundance measurementstat.error;phys.abunddoublenullable[Sc/Fe]? [Sc/Fe] abundance measurement from LoneStarphys.abunddoublenullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameAlias of star for the programmeta.id;meta.maincharTeff? Effective temperatureKphys.temperature.effectivefloatnullablee_Teff? Effective temperature errorKstat.error;phys.temperature.effectivefloatnullablelogg? Surface gravity measurement provided by isochroneslog(cm.s**-2)phys.gravityfloatnullablee_logg? Error on the surface gravity measurement from isochroneslog(cm.s**-2)stat.errorfloatnullable[Fe/H]? [Fe/H] abundance measurementphys.abunddoublenullablee_[Fe/H]? Error on the [Fe/H] abundance measurementstat.error;phys.abund.Fedoublenullable[Fe/H]LTE? LTE [Fe/H] abundance measurement from LoneStarphys.abund.Fedoublenullablexi? micro turbulence as measured by LoneStarkm/sphys.veloc.microTurbfloatnullable[Na/H]? [Na/H] abundance measurementphys.abunddoublenullablee_[Na/H]? Error on the [Na/H] abundance measurementstat.error;phys.abunddoublenullable[Na/Fe]? [Na/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Mg/H]? [Mg/H] abundance measurementphys.abunddoublenullablee_[Mg/H]? Error on the [Mg/H] abundance measurementstat.error;phys.abunddoublenullable[Mg/Fe]? [Mg/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Mg/H]LTE? LTE [Mg/H] abundance measurement from LoneStarphys.abunddoublenullable[Al/H]? [Al/H] abundance measurementphys.abunddoublenullablee_[Al/H]? Error on the [Al/H] abundance measurementstat.error;phys.abunddoublenullable[Al/Fe]? [Al/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Si/H]? [Si/H] abundance measurementphys.abunddoublenullablee_[Si/H]? Error on the [Si/H] abundance measurementstat.error;phys.abunddoublenullable[Si/Fe]? [Si/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Si/H]LTE? LTE [Si/H] abundance measurement from LoneStarphys.abunddoublenullable[Ca/H]? [Ca/H] abundance measurementphys.abunddoublenullablee_[Ca/H]? Error on the [Ca/H] abundance measurementstat.error;phys.abunddoublenullable[Ca/Fe]? [Ca/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Ca/H]LTE? LTE [Ca/H] abundance measurement from LoneStarphys.abunddoublenullable[Sc/H]? [Sc/H] abundance measurementphys.abunddoublenullablee_[Sc/H]? Error on the [Sc/H] abundance measurementstat.error;phys.abunddoublenullable[La/H]? [La/H] abundance measurementphys.abunddoublenullablee_[La/H]? Error on the [La/H] abundance measurementstat.error;phys.abunddoublenullable[La/Fe]? [La/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Nd/H]? [Nd/H] abundance measurementphys.abunddoublenullablee_[Nd/H]? Error on the [Nd/H] abundance measurementstat.error;phys.abunddoublenullable[Nd/Fe]? [Nd/Fe] abundance measurement from LoneStarphys.abunddoublenullable[Eu/H]? [Eu/H] abundance measurementphys.abunddoublenullablee_[Eu/H]? Error on the [Eu/H] abundance measurementstat.error;phys.abunddoublenullable[Eu/Fe]? [Eu/Fe] abundance measurement from LoneStarphys.abunddoublenullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainSimbadNameSimbad column added by the CDSmeta.idcharnullable