J/ApJ/920/51ivo://CDS.VizieR/J/ApJ/920/51doi:10.26093/cds/vizier.19200051CDSMalhan K.Yuan Z.Ibata R.A.Arentsen A.Bellazzini M.Martin N.F.2024-11-06T20:23:29Z2024-02-22T09:55:59ZCDS support team

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

cds-question@unistra.frstellar-associationsmilky-way-galaxymetallicitysurveysvisible-astronomyspectroscopyStellar streams produced from dwarf galaxies provide direct evidence of the hierarchical formation of the Milky Way. Here, we present the first comprehensive study of the LMS-1 stellar stream, that we detect by searching for wide streams in the Gaia EDR3 data set using the STREAMFINDER algorithm. This stream was recently discovered by Yuan et al. We detect LMS-1 as a 60{deg} long stream to the north of the galactic bulge, at a distance of ~20kpc from the Sun, together with additional components that suggest that the overall stream is completely wrapped around the inner Galaxy. Using spectroscopic measurements from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, the Sloan Digital Sky Survey, and the Apache Point Observatory Galactic Evolution Experiment, we infer that the stream is very metal-poor (<[Fe/H]>=-2.1) with a significant metallicity dispersion ({sigma}_[Fe/H]_=0.4), and it possesses a large radial velocity dispersion ({sigma}_v_=20+/-4km/s). These estimates together imply that LMS-1 is a dwarf galaxy stream. The orbit of LMS-1 is close to polar, with an inclination of 75{deg} to the galactic plane. Both the orbit and metallicity of LMS-1 are remarkably similar to the globular clusters NGC 5053, NGC 5024, and the stellar stream Indus. These findings make LMS-1 an important contributor to the stellar population of the inner Milky Way halo.2021ApJ...920...51Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/920/51CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/156 : LAMOST DR7 catalogs (Luo+, 2019)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)J/AJ/136/2050 : SEGUE stellar parameter pipeline. II. (Lee+, 2008)J/AJ/137/4377 : List of SEGUE plate pairs (Yanny+, 2009)J/A+A/511/L10 : Abundances and space velocities of 94 stars (Nissen+, 2010)J/A+A/531/A165 : MILES atmospheric parameters (Prugniel+, 2011)J/AJ/144/4 : Dwarf galaxies in the Local Group (McConnachie+, 2012)J/ApJ/779/102 : Metallicities of RGB stars in dwarf galaxies (Kirby+, 2013)J/ApJ/783/130 : Parallaxes of high mass star forming regions (Reid+, 2014)J/ApJ/804/109 : Equivalent widths of RGB stars in NGC 5053 (Boberg+, 2015)J/AJ/150/187 : Abundances and stellar param. of LAMOST stars (Lee+, 2015)J/ApJ/824/5 : Chemical abundances in NGC 5024 (M53) (Boberg+, 2016)J/A+A/585/A64 : New atmospheric param. of MILES cool stars (Sharma+, 2016)J/A+A/601/A41 : Palomar 5 abundance analysis (Koch+, 2017)J/MNRAS/478/4513 : GALAH Survey DR2 (Buder+, 2018)J/ApJS/238/16 : LAMOST-DR3 very metal-poor star catalog (Li+, 2018)J/ApJ/866/22 : Spectroscopic analysis of Tuc III stream (Li+, 2018)J/A+A/627/A138 : XSL atmospheric parameters (Arentsen+, 2019)J/MNRAS/482/5138 : Gal. GC mean proper motions & velocities (Baumgardt+, 2019)J/A+A/622/A60 : Gaia DR2 misclassified RR Lyrae list (Clementini+, 2019)J/MNRAS/485/4726 : An all-sky view of the Orphan Stream (Koposov+, 2019)J/MNRAS/486/2995 : GD-1 stellar stream (Malhan+, 2019)J/ApJS/245/34 : Abund. for 6 million stars from LAMOST DR5 (Xiang+, 2019)J/ApJ/889/63 : Properties of Sgr Stars (Hayes+, 2020)J/AJ/160/181 : Chemical abundances in red giants with Magellan (Ji+, 2020)J/A+A/638/A104 : Gaia DR2 cand. RR Lyrae of Sgr stream & dwarf (Ramos+, 2020)J/ApJ/891/39 : LAMOST very metal-poor stars of the Gal. halo (Yuan+, 2020)J/ApJ/914/123 : Gaia DR2 and EDR3 stars with sp. follow-up (Ibata+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/920/51https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/920/51http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/920/51https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/920/51https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/920/51http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/920/51GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/920/51/table1 (Stars of LMS-1 with spectroscopic observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/920/51/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/920/51/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/920/51/table1?GETtext/xml+votable180.050000true195.3384988913.229916940.0055555555555555566/8693 8696 8700 8702 8846 8858 8867 8871 8876 8878 8883 8911 8934 8952 8990 8996 9004 9007-9008 9013 9018 9021-9022 9035 9042 9048-9050 9058 9065 9067-9068 9070-9071 9075 9090 9092 9095 9106 9112 9117 9120 9128 9373 9377 9379 9385 9387 9400 9729 10247 10258 10260 26606 26619 26621 27921 27974https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/920/51?format=asciiOpticaldefaultJ/ApJ/920/51/table1Stars of LMS-1 with spectroscopic observationsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSurvey[1/3] Source survey (1)meta.noteintRAJ2000[195/246] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[13/33] Declination (J2000)degpos.eq.dec;meta.mainVlos[-201.5/109.6] Line of sight velocitykm/sphys.velocfloate_Vlos[0.1/34] Vlos uncertaintykm/sstat.errorfloat[Fe/H][-3.1/-0.6]? Metallicitylog(Sun)phys.abund.Zfloatnullablee_[Fe/H][0/0.4]? [Fe/H] uncertaintylog(Sun)stat.error;phys.abund.FefloatnullableAPOGEEDisplay data from APOGEE DR16 (III/284) and DR17 (III/286) within 3"meta.ref.urlcharLAMOSTDisplay data from LAMOST DR7 (V/156) within 3"meta.ref.urlcharSloanDisplay the online SDSS-DR17 data for the nearest objectmeta.ref.urlchar