Journal article
From the bulge to the outer disc: monospace StarHorse monospace stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys
Astronomy and astrophysics (Berlin), Vol.638, A76
06/15/2020
DOI: 10.1051/0004-6361/201937364
Abstract
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 similar to 6% for APOGEE giants, similar to 2% for APOGEE dwarfs, and extinction uncertainties of similar to 0.07 mag, when all photometric information is available, and similar to 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 (|Z(Gal)| < 1 kpc) from the Galactic centre out to R-Gal<similar to>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.
Details
- Title: Subtitle
- From the bulge to the outer disc: monospace StarHorse monospace stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys
- Creators
- A. B. A. Queiroz - Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam, GermanyF. Anders - Leibniz Institute for Astrophysics PotsdamC. Chiappini - Leibniz Institute for Astrophysics PotsdamA. Khalatyan - Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam, GermanyB. X. Santiago - Laboratório Interinstitucional de e-AstronomiaM. Steinmetz - Leibniz Institute for Astrophysics PotsdamM. Valentini - Leibniz Institute for Astrophysics PotsdamA. Miglio - University of BirminghamD. Bossini - Centre for Astrophysics of the University of PortoB. Barbuy - Museu de Astronomia e Ciências AfinsI Minchev - American Industrial PartnersD. Minniti - Universidad Andrés BelloD. A. Garcia Hernandez - Universidad de La LagunaM. Schultheis - Observatoire de la Côte d’AzurR. L. Beaton - Carnegie Observ, 813 Santa Barbara St, Pasadena, CA 91101 USAT. C. Beers - University of Notre DameD. Bizyaev - Moscow State UniversityJ. R. Brownstein - University of UtahK. Cunha - University of ArizonaJ. G. Fernandez-Trincado - Institut UTINAMP. M. Frinchaboy - Texas Christian UniversityR. R. Lane - Pontificia Univ Catolica Chile, Inst Astrofis, Av Vicuna Mackenna 4860, Santiago 7820436, ChileS. R. Majewski - University of VirginiaD. Nataf - Johns Hopkins UniversityC. Nitschelm - Universidad de AntofagastaK. PanA. Roman-Lopes - University of La SerenaJ. S. Sobeck - University of WashingtonG. Stringfellow - Univ Colorado, Dept Astrophys & Planetary Sci, Ctr Astrophys & Space Astron, 389 UCB, Boulder, CO 80309 USAO. Zamora - Instituto de Astrofísica de Canarias
- Resource Type
- Journal article
- Publication Details
- Astronomy and astrophysics (Berlin), Vol.638, A76
- DOI
- 10.1051/0004-6361/201937364
- ISSN
- 0004-6361
- eISSN
- 1432-0746
- Publisher
- Edp Sciences S A
- Number of pages
- 31
- Grant note
- French National Research Agency; Agence Nationale de la Recherche (ANR) Istituto Nazionale di Astrofisica at Padova; Istituto Nazionale Astrofisica (INAF) Australian National University 188.B-3002 / ESO Telescopes at the La Silla Paranal Observatory Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro (FAPERJ); Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio De Janeiro (FAPERJ) Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq); Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ) Financiadora de Estudos e Projetos (FINEP); Financiadora de Inovacao e Pesquisa (Finep) Natural Sciences and Engineering Research Council of Canada; Natural Sciences and Engineering Research Council of Canada (NSERC); CGIAR State Research Agency (AEI) of the Spanish Ministry of Science, Innovation and Universities (MCIU); Spanish Government Cosmos
- Language
- English
- Date published
- 06/15/2020
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984701721602771
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