Effects of the selection function on metallicity trends in spectroscopic surveys of the Milky Way

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dc.contributor.authorNandakumar, G.
dc.contributor.authorSchultheis, M.
dc.contributor.authorHayden, M.
dc.contributor.authorRojas Arriagada, A.
dc.contributor.authorKordopatis, G.
dc.contributor.authorHaywood, M.
dc.date.accessioned2024-01-10T12:38:37Z
dc.date.available2024-01-10T12:38:37Z
dc.date.issued2017
dc.description.abstractContext. Large spectroscopic Galactic surveys imply a selection function in the way they performed their target selection.
dc.description.abstractAims. We investigate here the effect of the selection function on the metallicity distribution function (MDF) and on the vertical metallicity gradient by studying similar lines of sight using four different spectroscopic surveys (APOGEE, LAMOST, RAVE, and Gaia-ESO), which have different targeting strategies and therefore different selection functions.
dc.description.abstractMethods. We use common fields between the spectroscopic surveys of APOGEE, LAMOST, RAVE (ALR) and APOGEE, RAVE, Gaia-ESO (AGR) and use two stellar population synthesis models, GALAXIA and TRILEGAL, to create mock fields for each survey. We apply the selection function in the form of colour and magnitude cuts of the respective survey to the mock fields to replicate the observed source sample. We make a basic comparison between the models to check which best reproduces the observed sample distribution. We carry out a quantitative comparison between the synthetic MDF from the mock catalogues using both models to understand the effect of the selection function on the MDF and on the vertical metallicity gradient.
dc.description.abstractResults. Using both models, we find a negligible effect of the selection function on the MDF for APOGEE, LAMOST, and RAVE. We find a negligible selection function effect on the vertical metallicity gradients as well, though GALAXIA and TRILEGAL have steeper and shallower slopes, respectively, than the observed gradient. After applying correction terms on the metallicities of RAVE and LAMOST with respect to our reference APOGEE sample, our observed vertical metallicity gradients between the four surveys are consistent within 1 sigma. We also find consistent gradient for the combined sample of all surveys in ALR and AGR. We estimated a mean vertical metallicity gradient of -0.241 +/- 0 : 028 dex kpc(-1). There is a significant scatter in the estimated gradients in the literature, but our estimates are within their ranges.
dc.description.abstractConclusions. We have shown that there is a negligible selection function effect on the MDF and the vertical metallicity gradients for APOGEE, RAVE, and LAMOST using two stellar population synthesis models. Therefore, it is indeed possible to combine common fields of different surveys in studies using MDF and metallicity gradients provided their metallicities are brought to the same scale.
dc.description.funderProgramme National de Cosmologie et Galaxies (PNCG) of CNRS/INSU, France
dc.description.funderAlfred P. Sloan Foundation
dc.description.funderNational Science Foundation
dc.description.funderUS Department of Energy Office of Science
dc.description.funderAustralian Astronomical Observatory
dc.description.funderLeibniz-Institut fuer Astrophysik Potsdam (AIP)
dc.description.funderAustralian National University
dc.description.funderAustralian Research Council
dc.description.funderFrench National Research Agency
dc.description.funderGerman Research Foundation
dc.description.funderEuropean Research Council
dc.description.funderIstituto Nazionale di Astrofisica at Padova
dc.description.funderJohns Hopkins University
dc.description.funderNational Science Foundation of USA
dc.description.funderW. M. Keck foundation
dc.description.funderMacquarie University
dc.description.funderNetherlands Research School for Astronomy
dc.description.funderNatural Sciences and Engineering Research Council of Canada
dc.description.funderSlovenian Research Agency
dc.description.funderSwiss National Science Foundation
dc.description.funderScience & Technology Facilities Council of UK
dc.description.funderOpticon
dc.description.funderStrasbourg Observatory
dc.description.funderUniversity of Groningen
dc.description.funderUniversity of Heidelberg
dc.description.funderUniversity of Sydney
dc.description.funderUK Science and Technology Facilities Council
dc.description.funderEuropean Union FP7 programme through ERC
dc.description.funderLeverhulme Trust
dc.description.funderINAF
dc.description.funderMinistero dell' Istruzione, dell' Universita' e della Ricerca (MIUR)
dc.description.funderESF (European Science Foundation) through GREAT Research Network Programme
dc.description.funderNational Development and Reform Commission
dc.fechaingreso.objetodigital2024-05-02
dc.format.extent16 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1051/0004-6361/201731099
dc.identifier.eissn1432-0746
dc.identifier.issn0004-6361
dc.identifier.urihttps://doi.org/10.1051/0004-6361/201731099
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/77073
dc.identifier.wosidWOS:000413562900002
dc.information.autorucFísica; Rojas A;S/I;154618
dc.language.isoen
dc.nota.accesocontenido parcial
dc.publisherEDP SCIENCES S A
dc.revistaASTRONOMY & ASTROPHYSICS
dc.rightsacceso restringido
dc.subjectsolar neighborhood
dc.subjectGalaxy: evolution
dc.subjectGalaxy: disk
dc.subjectGalaxy: abundances
dc.subjectGalaxy: stellar content
dc.subjectGalaxy: general
dc.subjectSTELLAR ATMOSPHERIC PARAMETERS
dc.subjectGALACTIC DISK
dc.subjectCHEMICAL ABUNDANCES
dc.subjectOPEN CLUSTERS
dc.subjectSKY SURVEY
dc.subjectEVOLUTION
dc.subjectGRADIENTS
dc.subjectSTARS
dc.subjectSEGUE
dc.subjectLAMOST
dc.subject.ods11 Sustainable Cities and Communities
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titleEffects of the selection function on metallicity trends in spectroscopic surveys of the Milky Way
dc.typeartículo
dc.volumen606
sipa.codpersvinculados154618
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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