J/ApJ/869/122ivo://CDS.VizieR/J/ApJ/869/122doi:10.26093/cds/vizier.18690122CDSLi G.-W.Yanny B.Wu Y.2021-09-07T12:26:12Z2019-12-30T13:35:34ZCDS support team

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

cds-question@unistra.frvisible-astronomyspectroscopyproper-motionssloan-photometrymetallicityradial-velocityCombining data from Gaia DR2, SDSS DR14, and LAMOST DR6, we update the fit to model of the properties of the stellar stream GD-1 and find that it has an age of ~13Gyr, [Fe/H] of -2.2+/-0.12, and a distance from the Sun of ~8kpc. We tabulate six-dimensional (6D) phase-space fiducial points along the GD-1 stream orbit over a 90{deg} arc. The fitted orbit shows that the stream has an eccentricity e~0.3, perigalacticon of 14.2kpc, apogalacticon of 27.0kpc, and inclination i~40{deg}. There is evidence along the arc for four candidate stellar overdensities, one candidate gap, two candidate stellar underdensities, and that the stream is cut off at {phi}_1_~2{deg} (in the stream-aligned ({phi}_1_, {phi}_2_) coordinate system of Koposov+ 2010ApJ...712..260K). The spur originating at {phi}_1_~-40{deg} implies stars were pulled away from the stream trace by an encounter (potentially a dark matter subhalo). The narrowest place (FWHM~44.6pc) of the GD-1 trace is at ({phi}_1_, {phi}2^c^)~(-14{deg}, 0.15{deg}), which is ~(178.18{deg}, 52.19{deg}) in (RA, DE), where the progenitor is possibly located. We also find six blue horizontal branch and 10 blue stragglers spectroscopic stars in the GD-1 stream.2018ApJ...869..122Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/869/122CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)I/345 : Gaia DR2 (Gaia Collaboration, 2018)V/164 : LAMOST DR5 catalogs (Luo+, 2019)J/ApJ/697/207 : Cold stellar stream orbit fit (Willett+, 2009)J/AJ/137/4377 : List of SEGUE plate pairs (Yanny+, 2009)J/other/RAA/11.924 : Atmospheric parameters for 771 stars (Wu+, 2011)J/A+A/525/A71 : Atmospheric parameters for 1273 stars (Wu+, 2011)J/other/RAA/17.62 : Candidate members of 4 stellar streams (Li+, 2017)J/MNRAS/486/2995 : GD-1 stellar stream (Malhan+, 2019)http://www.sdss.org/ : SDSS home pagehttp://dr6.lamost.org/ : LAMOST DR6 home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/869/122https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/869/122http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/869/122https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/869/122https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/869/122http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/869/122GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/869/122/table4 (LAMOST DR6 spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/869/122/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/869/122/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/869/122/table4?GETtext/xml+votable180.050000true141.6613638926.8416650.005555555555555556Cone search capability for table J/ApJ/869/122/table7 (Spectra of BHB and BS stars in SDSS DR14)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/869/122/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/869/122/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/869/122/table7?GETtext/xml+votable180.050000true143.4531929.120641940.005555555555555556Cone search capability for table J/ApJ/869/122/table8 (BHB and BS stars of the GD-1 stream)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/869/122/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/869/122/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/869/122/table8?GETtext/xml+votable180.050000true140.2365961125.533821110.005555555555555556Cone search capability for table J/ApJ/869/122/table3 (SDSS DR14 spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/869/122/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/869/122/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/869/122/table3?GETtext/xml+votable180.050000true126.577155-0.439391110.005555555555555556Cone search capability for table J/ApJ/869/122/table6 (Spectra of blue horizontal branch (BHB) and BS (blue straggler) stars in LAMOST DR6)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/869/122/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/869/122/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/869/122/table6?GETtext/xml+votable180.050000true140.2365388925.533823890.0055555555555555566/4138 4228 4231 4249 4252 4253 4255 4298 4321 4336 4514 4525 4538 4539 4928 4931 4932 4934 4935 4946 4947 4950 4951 4953 4957 5634 5638 5641 5645 5657 5660 5699 5702 5704 5709 5715 5718 5719 5720 5723 5725 5890 5891 5894 5895 5896 5897 5898 5900 5902 5906 5907 5910 5911 5912 5913 5915 5916 5959 5960 5969 5973 11007 11119 11130 11131 11132 11179 11180 11182 11186 11188 11192 11216 11787 11789 11809 11812 21859 21862 21869 218862.85864675833786e-19 4.653515163505597e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/869/122?format=asciiOpticaldefaultJ/ApJ/869/122/table4LAMOST DR6 spectraSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpIDLAMOST spectral IDmeta.id;meta.maincharRAJ2000[141.5/209.6] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[26.8/58.5] Declination (J2000)degpos.eq.dec;meta.mainphi1[-51.2/4.8] Stream-centered {phi}_1_ coordinatedegpos.eq.radoublephi2[-1.9/1.2] Stream-centered {phi}_2_ coordinatedegpos.eq.decdoublepmRA[-7.9/-4.3] Proper motion along RA * cos(DE)mas/yrpos.pm;pos.eq.rafloatpmDE[-13.4/-2.5] Proper motion along DEmas/yrpos.pm;pos.eq.decfloatg0mag[13.7/18.2] Intrinsic SDSS g band magnitudemagphot.mag;em.opt.Bfloatr0mag[12.9/17.8] Intrinsic SDSS r band magnitudemagphot.mag;em.opt.Rfloat[Fe/H][-2.5/-1.8] Metallicityphys.abund.Zfloate_[Fe/H][0.02/0.3] Uncertainty in [Fe/H]stat.error;phys.abund.FefloatRVel[-279/80] Radial velocitykm/sphys.veloc;pos.heliocentricfloate_RVel[1/19.5] Uncertainty in RVelkm/sstat.error;spect.dopplerVelocfloatGaiaDisplay the Gaia DR2 data (I/345) within 1"meta.ref.urlcharLAMOSTDisplay the LAMOST DR4 (V/153) and DR5 (V/164) data within 1"meta.ref.urlcharJ/ApJ/869/122/table7Spectra of BHB and BS stars in SDSS DR14SimbadNameSimbad column added by the CDSmeta.idcharnullableClassBHB or BS starmeta.code.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpIDSDSS spectroscopic identifier (plate-MJD-fiber)meta.id;meta.maincharRAJ2000[128.6/186.5] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[3.8/56.7] Declination (J2000)degpos.eq.dec;meta.mainphi1[-77.3/-7.6] Stream-centered {phi}_1_ coordinatedegpos.eq.radoublephi2[-1.6/0.2] Stream-centered {phi}_2_ coordinatedegpos.eq.decdouble[Fe/H][-2.8/-1.4] Metallicitycityphys.abund.Fefloate_[Fe/H][0.02/0.3] Uncertainty in [Fe/H]stat.error;phys.abund.FefloatRVel[-198/237] Radial velocitykm/sphys.veloc;pos.heliocentricfloate_RVel[1.7/9.8] Uncertainty in RVelkm/sstat.error;spect.dopplerVelocfloatSpInteractive spectrum from SDSS-DR12meta.ref.urlcharJ/ApJ/869/122/table8BHB and BS stars of the GD-1 streamSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[128.6/205.9] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[3.8/59.5] Declination (J2000)degpos.eq.dec;meta.mainphi1[-77.3/3] Stream-centered {phi}_1_ coordinatedegpos.eq.radoublephi2[-2.6/1.1] Stream-centered {phi}_2_ coordinatedegpos.eq.decdoublepmRA[-8.6/-0.7] Proper motion along RA * cos(DE)mas/yrpos.pm;pos.eq.rafloatpmDE[-13.2/-2] Proper motion along DEmas/yrpos.pm;pos.eq.decfloatg0mag[14.8/18.8] Intrinsic SDSS g band magnitudemagphot.mag;em.opt.Bfloatr0mag[14.9/18.7] Intrinsic SDSS r band magnitudemagphot.mag;em.opt.RfloatSpecSpectra flag (1)meta.codecharClassBHB or BS starmeta.code.classcharSpDisplay the spectral data from tables 6 and 7meta.ref.urlintnullableJ/ApJ/869/122/table3SDSS DR14 spectraSimbadNameSimbad column added by the CDSmeta.idcharnullableSpInteractive spectrum from SDSS-DR12meta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpIDSDSS spectroscopic identifier (plate-MJD-fiber)meta.id;meta.maincharRAJ2000[126.5/206] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-0.5/58.6] Declination (J2000)degpos.eq.dec;meta.mainphi1[-82.1/2.9] Stream-centered {phi}_1_ coordinatedegpos.eq.radoublephi2[-2.4/1.1] Stream-centered {phi}_2_ coordinatedegpos.eq.decdoublepmRA[-9.4/-0.8] Proper motion along RA * cos(DE)mas/yrpos.pm;pos.eq.rafloatpmDE[-14.2/-3] Proper motion along DEmas/yrpos.pm;pos.eq.decfloatg0mag[14.9/20.3] Intrinsic SDSS g band magnitudemagphot.mag;em.opt.Bfloatr0mag[14.4/19.9] Intrinsic SDSS r band magnitudemagphot.mag;em.opt.Rfloat[Fe/H][-2.5/-1.8] Metallicityphys.abund.Zfloate_[Fe/H][0/1] Uncertainty in [Fe/H]stat.error;phys.abund.FefloatRVel[-262/264] Radial velocitykm/sphys.veloc;pos.heliocentricfloate_RVel[7/113] Uncertainty in RVelkm/sstat.error;spect.dopplerVelocfloatGaiaDisplay the Gaia DR2 data (I/345) within 1"meta.ref.urlcharJ/ApJ/869/122/table6Spectra of blue horizontal branch (BHB) and BS (blue straggler) stars in LAMOST DR6SimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpIDLAMOST spectral IDmeta.id;meta.maincharRAJ2000[140.2/200.6] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[25.5/58.1] Declination (J2000)degpos.eq.dec;meta.mainphi1[-53/-0.01] Stream-centered {phi}_1_ coordinatedegpos.eq.radoublephi2[-1.4/0.5] Stream-centered {phi}_2_ coordinatedegpos.eq.decdoubleRVel[-264.7/84.4] Radial velocitykm/sphys.veloc;pos.heliocentricfloate_RVel[0.3/5.9] Uncertainty in RVelkm/sstat.error;spect.dopplerVelocfloatClassBHB or BS starmeta.code.classcharLAMOSTDisplay the LAMOST DR4 (V/153) and DR5 (V/164) data within 1"meta.ref.urlchar