J/A+A/663/A126ivo://CDS.VizieR/J/A+A/663/A126doi:10.26093/cds/vizier.36630126CDSFernandez-Trincado J.G.Beers T.C.Barbuy B.Minniti D.Chiappini C.,Garro E.R.Tang B.Alves-Brito A.Villanova S.Geisler D.Lane R.R.,Diaz D.G.2023-11-09T08:05:32Z2022-07-19T13:14:14ZCDS support team

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

cds-question@unistra.frpeculiar-variable-starschemically-peculiar-starsradial-velocityinfrared-astronomyspectroscopyWe use the 17th data release of the second phase of the Apache Point Observatory Galactic Evolution Experiment (APOGEE-2) to provide a homogenous census of N-rich red giant stars across the Milky Way (MW). We report a total of 149 newly identified N-rich field giants toward the bulge, metal-poor disk, and halo of our Galaxy. They exhibit significant enrichment in their nitrogen abundance ratios ([N/Fe]>+0.5), along with simultaneous depletions in their [C/Fe] abundance ratios ([C/Fe]<+0.15), and they cover a wide range of metallicities (-1.8<[Fe/H]<-0.7). The final sample of candidate N-rich red giant stars with globular-cluster-like (GC-like) abundance patterns from the APOGEE survey includes a grand total of 412 unique objects. These strongly N-enhanced stars are speculated to have been stripped from GCs based on their chemical similarities with these systems. Even though we have not found any strong evidence for binary companions or signatures of pulsating variability yet, we cannot rule out the possibility that some of these objects were members of binary systems in the past and/or are currently part of a variable system. In particular, the fact that we identify such stars among the field stars in our Galaxy provides strong evidence that the nucleosynthetic process(es) producing the anomalous [N/Fe] abundance ratios occurs over a wide range of metallicities. This may provide evidence either for or against the uniqueness of the progenitor stars to GCs and/or the existence of chemical anomalies associated with likely tidally shredded clusters in massive dwarf galaxies such as "Kraken/Koala", Gaia-Enceladus-Sausage, among others, before or during their accretion by the MW. A dynamical analysis reveals that the newly identified N-rich stars exhibit a wide range of dynamical characteristics throughout the MW, indicating that they were produced in a variety of Galactic environments.2022A&A...663A.126Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/663/A126CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/663/A126https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/663/A126http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/663/A126https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/663/A126https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/663/A126http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/663/A126GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/663/A126/table1 (Basic parameters of 149 newly identified Nitrogen rich stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/663/A126/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/663/A126/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/663/A126/table1?GETtext/xml+votable180.050000true266.02353806-34.419036940.0055555555555555566/435 4773 4803 4992 5939 5945 5955 6810 8321 9039 9071 9231 9233 9240 9246 9294 9337 9511 9859 9879 9931 9983 10264 10382 10437 10585 10620 10810 10993 11038 11277 11750 14921 14924 14939 14946 15042 15150 15340 16107 17389 17741 17796 18046 18302 18605 23191 25528 26197 27008 27094 27256 27422 27523 28718 28731 28733 28735 28769 28778-28779 28804 28813 28828 28830 28836 28839 28845 28851 28857-28858 28861-28862 28867 28870 28947 28952 28958 28995 28998 29004 29187 29210 29228 29239 29265 29351 29376 29604 29740 30041 31040 31058 31118 31728 32849 33036 33050 33144 33173 33328 33338-33339 33426 33870 33875 36622 36878 37007 37474 37611 38111 39042 39057 39080 40161 41506 42280 42473 42570 42583 42614 42708 42858 42886 42944 42984 42986 44384 45025 47063 47658 47827 47871 48030 48034 48597 486111.1166583743361574e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/663/A126?format=asciiInfrareddefaultJ/A+A/663/A126/table1Basic parameters of 149 newly identified Nitrogen rich starsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAPOGEEAPOGEE identifier (APOGEE_ID)meta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainJmag? 2MASS J band magnitudemagphot.mag;em.IR.JdoublenullableHmag2MASS H band magnitudemagphot.mag;em.IR.HfloatKmag? 2MASS K band magnitudemagphot.mag;em.IR.KdoublenullableBPmagGaia EDR3 BP band magnitudemagphot.mag;em.opt.BdoubleRPmagGaia EDR3 RP band magnitudemagphot.mag;em.opt.RdoubleGmagGaia EDR3 G band magnitudemagphot.mag;em.optdoubleSNRSpectral signal-to-noisestat.snrintRVAAPOGEE-2 radial velocitykm/sspect.dopplerVelocfloatVsctAPOGEE-2 radial velocity scatterkm/sphys.veloc.dispersionfloatTeffEffective temperatureKphys.temperature.effectiveinte_TeffUncertainty in TeffKstat.error;phys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloate_loggUncertainty in logglog(cm.s**-2)stat.errorfloat[C/Fe]Abundance [C/Fe] from ASPCAPphys.abundfloate_[C/Fe]Uncertainty in [C/Fe]stat.error;phys.abundfloat[N/Fe]Abundance [N/Fe] from ASPCAPphys.abundfloate_[N/Fe]Uncertainty in [N/Fe]stat.error;phys.abundfloat[Mg/Fe]Abundance [Mg/Fe] from ASPCAPphys.abundfloate_[Mg/Fe]Uncertainty in [Mg/Fe]stat.error;phys.abundfloat[Al/Fe]? Abundance [Al/Fe] from ASPCAPphys.abundfloatnullablee_[Al/Fe]? Uncertainty in [Al/Fe]stat.error;phys.abundfloatnullable[Mn/Fe]? Abundance [Mn/Fe] from ASPCAPphys.abundfloatnullablee_[Mn/Fe]? Uncertainty in [Mn/Fe]stat.error;phys.abundfloatnullable[Fe/H]Abundance [Fe/H] from ASPCAPphys.abund.Fefloate_[Fe/H]Uncertainty in [Fe/H]stat.error;phys.abund.FefloatRV? Galactocentric radial velocitykm/sphys.veloc;pos.galactocentricdoublenullablee_RV? Uncertainty in RVkm/sstat.errordoublenullableVphi? Galactocentric azimuthal velocitykm/sphys.veloc;pos.galactocentricfloatnullablee_Vphi? Uncertainty in Vphikm/sstat.errordoublenullableDistpg? Perigalactocentric distancekpcpos.distance;pos.galactocentricfloatnullablee_Distpg? Uncertainty in Distpgkpcstat.errorfloatnullableDistag? Apogalactocentric distancekpcpos.distance;pos.galactocentricfloatnullablee_Distag? Uncertainty in Distagkpcstat.errorfloatnullableEcc? Orbital eccentricitysrc.orbital.eccentricityfloatnullablee_Ecc? Uncertainty in Eccentricitystat.errorfloatnullableZmax? Maximum vertical excursion from the Galactic planekpcpos.cartesian.z;pos.galacticfloatnullablee_Zmax? Uncertainty in Zmaxkpcstat.errorfloatnullableOrbSenseOrbital sensemeta.notecharRUWEGaia EDR3 renormalized unit weight errorstat.errordoubleDist? Bayesian StarHorse distance, 50th percentile (1)kpcpos.distancedoublenullablee_Dist? Uncertainty in Dist; error = (84th-16th)/2 percentilekpcstat.errordoublenullablepmRA? Proper motion in RA (pmRA*cosDE) from Gaia EDR3mas/yrpos.pm;pos.eq.radoublenullablee_pmRA? Uncertainty in pmRA from Gaia EDR3mas/yrstat.error;pos.pm;pos.eq.radoublenullablepmDE? Proper motion in DEC (pmDEC) from Gaia EDR3mas/yrpos.pm;pos.eq.decdoublenullablee_pmDE? Uncertainty in pmDEC from Gaia EDR3mas/yrstat.error;pos.pm;pos.eq.decdoublenullableJ/A+A/663/A126/table3Compilation of 412 Nitrogen rich starsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAPOGEEAPOGEE identifier (APOGEE_ID)meta.id;meta.mainchardoiDigital Object Identifier of literature associated with N-rich star studiesmeta.bibchar