From the bulge to the outer disc : StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/235104 |
Resumo: | We combine high-resolution spectroscopic data from APOGEE-2 survey Data Release 16 (DR16) with broad-band photometric data from several sources as well as parallaxes from Gaia Data Release 2 (DR2). Using the Bayesian isochrone-fitting code StarHorse, we derived the distances, extinctions, and astrophysical parameters for around 388 815 APOGEE stars. We achieve typical distance uncertainties of ∼6% for APOGEE gi ants, ∼2% for APOGEE dwarfs, and extinction uncertainties of ∼0.07 mag, when all photometric information is available, and ∼0.17 mag if optical photometry is missing. StarHorse uncertainties vary with the input spectroscopic catalogue, available photometry, and parallax uncertainties. To illustrate the impact of our results, we show that thanks to Gaia DR2 and the now larger sky coverage of APOGEE-2 (including APOGEE-South), we obtain an extended map of the Galactic plane. We thereby provide an unprecedented coverage of the disc close to the Galactic mid-plane (|ZGal| < 1 kpc) from the Galactic centre out to RGal ∼ 20 kpc. The improvements in statistics as well as distance and extinction uncertainties unveil the presence of the bar in stellar density and the striking chemical duality in the innermost regions of the disc, which now clearly extend to the inner bulge. We complement this paper with distances and extinctions for stars in other public released spectroscopic surveys: 324 999 in GALAH DR2, 4 928 715 in LAMOST DR5, 408 894 in RAVE DR6, and 6095 in GES DR3. |
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Queiroz, Anna Bárbara de AndradeSantiago, Basilio XavierZamora, Olga2022-02-12T04:53:21Z20200004-6361http://hdl.handle.net/10183/235104001129539We combine high-resolution spectroscopic data from APOGEE-2 survey Data Release 16 (DR16) with broad-band photometric data from several sources as well as parallaxes from Gaia Data Release 2 (DR2). Using the Bayesian isochrone-fitting code StarHorse, we derived the distances, extinctions, and astrophysical parameters for around 388 815 APOGEE stars. We achieve typical distance uncertainties of ∼6% for APOGEE gi ants, ∼2% for APOGEE dwarfs, and extinction uncertainties of ∼0.07 mag, when all photometric information is available, and ∼0.17 mag if optical photometry is missing. StarHorse uncertainties vary with the input spectroscopic catalogue, available photometry, and parallax uncertainties. To illustrate the impact of our results, we show that thanks to Gaia DR2 and the now larger sky coverage of APOGEE-2 (including APOGEE-South), we obtain an extended map of the Galactic plane. We thereby provide an unprecedented coverage of the disc close to the Galactic mid-plane (|ZGal| < 1 kpc) from the Galactic centre out to RGal ∼ 20 kpc. The improvements in statistics as well as distance and extinction uncertainties unveil the presence of the bar in stellar density and the striking chemical duality in the innermost regions of the disc, which now clearly extend to the inner bulge. We complement this paper with distances and extinctions for stars in other public released spectroscopic surveys: 324 999 in GALAH DR2, 4 928 715 in LAMOST DR5, 408 894 in RAVE DR6, and 6095 in GES DR3.application/pdfengAstronomy and astrophysics. Les Ulis. Vol. 638 (June 2020), A76, 31 p.EspectroscopiaFotometria astronômicaGaláxiasStars : DistancesStars : Fundamental parametersStars : StatisticsGalaxies : GeneralGalaxies : DiskGalaxies : Stellar contentFrom the bulge to the outer disc : StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveysEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001129539.pdf.txt001129539.pdf.txtExtracted Texttext/plain107314http://www.lume.ufrgs.br/bitstream/10183/235104/2/001129539.pdf.txt2a934ff9b450017bbee476ffd38e6675MD52ORIGINAL001129539.pdfTexto completo (inglês)application/pdf8076538http://www.lume.ufrgs.br/bitstream/10183/235104/1/001129539.pdf46f7d1e05898835b294811d43ba3dd17MD5110183/2351042023-07-02 03:42:29.685752oai:www.lume.ufrgs.br:10183/235104Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-02T06:42:29Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
From the bulge to the outer disc : StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys |
title |
From the bulge to the outer disc : StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys |
spellingShingle |
From the bulge to the outer disc : StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys Queiroz, Anna Bárbara de Andrade Espectroscopia Fotometria astronômica Galáxias Stars : Distances Stars : Fundamental parameters Stars : Statistics Galaxies : General Galaxies : Disk Galaxies : Stellar content |
title_short |
From the bulge to the outer disc : StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys |
title_full |
From the bulge to the outer disc : StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys |
title_fullStr |
From the bulge to the outer disc : StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys |
title_full_unstemmed |
From the bulge to the outer disc : StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys |
title_sort |
From the bulge to the outer disc : StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys |
author |
Queiroz, Anna Bárbara de Andrade |
author_facet |
Queiroz, Anna Bárbara de Andrade Santiago, Basilio Xavier Zamora, Olga |
author_role |
author |
author2 |
Santiago, Basilio Xavier Zamora, Olga |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Queiroz, Anna Bárbara de Andrade Santiago, Basilio Xavier Zamora, Olga |
dc.subject.por.fl_str_mv |
Espectroscopia Fotometria astronômica Galáxias |
topic |
Espectroscopia Fotometria astronômica Galáxias Stars : Distances Stars : Fundamental parameters Stars : Statistics Galaxies : General Galaxies : Disk Galaxies : Stellar content |
dc.subject.eng.fl_str_mv |
Stars : Distances Stars : Fundamental parameters Stars : Statistics Galaxies : General Galaxies : Disk Galaxies : Stellar content |
description |
We combine high-resolution spectroscopic data from APOGEE-2 survey Data Release 16 (DR16) with broad-band photometric data from several sources as well as parallaxes from Gaia Data Release 2 (DR2). Using the Bayesian isochrone-fitting code StarHorse, we derived the distances, extinctions, and astrophysical parameters for around 388 815 APOGEE stars. We achieve typical distance uncertainties of ∼6% for APOGEE gi ants, ∼2% for APOGEE dwarfs, and extinction uncertainties of ∼0.07 mag, when all photometric information is available, and ∼0.17 mag if optical photometry is missing. StarHorse uncertainties vary with the input spectroscopic catalogue, available photometry, and parallax uncertainties. To illustrate the impact of our results, we show that thanks to Gaia DR2 and the now larger sky coverage of APOGEE-2 (including APOGEE-South), we obtain an extended map of the Galactic plane. We thereby provide an unprecedented coverage of the disc close to the Galactic mid-plane (|ZGal| < 1 kpc) from the Galactic centre out to RGal ∼ 20 kpc. The improvements in statistics as well as distance and extinction uncertainties unveil the presence of the bar in stellar density and the striking chemical duality in the innermost regions of the disc, which now clearly extend to the inner bulge. We complement this paper with distances and extinctions for stars in other public released spectroscopic surveys: 324 999 in GALAH DR2, 4 928 715 in LAMOST DR5, 408 894 in RAVE DR6, and 6095 in GES DR3. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020 |
dc.date.accessioned.fl_str_mv |
2022-02-12T04:53:21Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://hdl.handle.net/10183/235104 |
dc.identifier.issn.pt_BR.fl_str_mv |
0004-6361 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001129539 |
identifier_str_mv |
0004-6361 001129539 |
url |
http://hdl.handle.net/10183/235104 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy and astrophysics. Les Ulis. Vol. 638 (June 2020), A76, 31 p. |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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