Dataciencia

Colección SciELO Chile

SDSS-IV MaStar: Stellar parameter determination with continuum-supplemented full-spectrum fitting

Indexado

WoS	WOS:000896303600016
Scopus	SCOPUS_ID:85145354684

DOI

10.1051/0004-6361/202243701

Año

2022

Tipo

artículo de investigación

Citas Totales

Autores Afiliación Chile

Instituciones Chile

% Participación
Internacional

Autores
Afiliación Extranjera

Instituciones
Extranjeras

Abstract

Aims. We present a stellar parameter catalog built to accompany the MaStar Stellar Library, which is a comprehensive collection of empirical, medium-resolution stellar spectra.Methods. We constructed this parameter catalog by using a multicomponent chi(2) fitting approach to match MaStar spectra to models generated by interpolating the ATLAS9-based BOSZ model spectra. The total chi(2) for a given model is defined as the sum of components constructed to characterize narrow-band features of observed spectra (e.g., absorption lines) and the broadband continuum shape separately. Extinction and systematics due to flux calibration were taken into account in the fitting. The chi(2) distribution for a given region of model space was sampled using a Markov chain Monte Carlo (MCMC) algorithm, the data from which were then used to extract atmospheric parameter estimates (T-eff, log g, [Fe/H], and [alpha/Fe]), their corresponding uncertainties, and direct extinction measurements.Results. Two methods were used to extract parameters and uncertainties: one that accepts the MCMC's prescribed minimum-chi(2) result, and one that uses Bayesian inference to compute a likelihood-weighted mean from the chi(2) distribution sampled by the MCMC. Results were evaluated for internal consistency using repeat observations where available and by comparing them with external data sets (e.g., APOGEE-2 and Gaia DR2). Our spectral-fitting exercise reveals possible deficiencies in current theoretical model spectra, illustrating the potential power of MaStar spectra for helping to improve the models. This paper represents an update to the parameters that were originally presented with SDSS-IV DR17. The MaStar parameter catalog containing our BestFit results is available on the SDSS-IV DR17 website as part of version 2 of the MaStar stellar parameter value-added catalog.

Revista

Revista	ISSN
Astronomy & Astrophysics	0004-6361

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Disciplinas de Investigación

WOS
Astronomy & Astrophysics

Scopus
Sin Disciplinas

SciELO
Sin Disciplinas

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Publicaciones WoS (Ediciones: ISSHP, ISTP, AHCI, SSCI, SCI), Scopus, SciELO Chile.

Colaboración Institucional

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Autores - Afiliación

Ord.	Autor	Género	Institución - País
1	Lazarz, Daniel	Hombre	UNIV KENTUCKY - Estados Unidos University of Kentucky - Estados Unidos
2	Yan, Renbin	-	Chinese Univ Hong Kong - China Chinese University of Hong Kong - Hong Kong
3	Wilhelm, Ronald	Hombre	UNIV KENTUCKY - Estados Unidos University of Kentucky - Estados Unidos
4	Chen, Yan-Ping	Hombre	New York Univ Abu Dhabi - Emiratos Árabes Unidos NYU Abu Dhabi - Emiratos Árabes Unidos
5	Hill, Lewis	Hombre	Univ Portsmouth - Reino Unido University of Portsmouth - Reino Unido
6	Holtzman, J. A.	Hombre	New Mex State Univ - Estados Unidos New Mexico State University - Estados Unidos
7	Imig, Julie	Mujer	New Mex State Univ - Estados Unidos New Mexico State University - Estados Unidos
8	Maraston, Claudia	Mujer	Univ Portsmouth - Reino Unido University of Portsmouth - Reino Unido
9	Meszaros, Szabolcs	Hombre	ELTE Eotv Lorand Univ - Hungría Eötvös Loránd Tudományegyetem - Hungría EötvösLoránd University - Hungría ELTE EötvösLoránd University - Hungría
10	Stringfellow, Guy	Hombre	UNIV COLORADO - Estados Unidos University of Colorado Boulder - Estados Unidos
11	Thomas, Daniel	Hombre	Univ Portsmouth - Reino Unido University of Portsmouth - Reino Unido
12	Beers, T. C.	Hombre	UNIV NOTRE DAME - Estados Unidos University of Notre Dame - Estados Unidos
13	Bizyaev, Dmitry	Hombre	New Mex State Univ - Estados Unidos Moscow MV Lomonosov State Univ - Rusia Apache Point Observatory - Estados Unidos Lomonosov Moscow State University - Rusia
14	Drory, Niv	-	Univ Texas Austin - Estados Unidos The University of Texas at Austin - Estados Unidos
15	LANE, RICHARD READE	Hombre	Universidad Bernardo O'Higgins - Chile
16	Nitschelm, Christian	Hombre	UNIV NOTRE DAME - Chile Universidad de Antofagasta - Chile

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Financiamiento

Fuente
National Science Foundation
US National Science Foundation
NSF
Alfred P. Sloan Foundation
Physics Frontier Center/JINA Center for the Evolution of the Elements (JINA-CEE) - US National Science Foundation
Office of Science
Center for High-Performance Computing at the University of Utah
Research Grants Council, University Grants Committee
US Department of Energy Office of Science
Hong Kong Jockey Club through the JC STEM Lab of Astronomical Instrumentation program
Direct Grant of CUHK Faculty of Science
Research Grant Council of the Hong Kong Special Administrative Region, China
Hong Kong Global STEM Scholar scheme

Muestra la fuente de financiamiento declarada en la publicación.

Agradecimientos

Agradecimiento
D.L., R.Y., and R.W. would like to acknowledge support by the NSF grant AST-1715898. R.Y. would like to acknowledge support by the Hong Kong Global STEM Scholar scheme, by the Hong Kong Jockey Club through the JC STEM Lab of Astronomical Instrumentation program, by the Direct Grant of CUHK Faculty of Science, and by the Research Grant Council of the Hong Kong Special Administrative Region, China (Projects No. 14302522). T.C.B. acknowledges partial support for this work from grant PHY 14-30152; Physics Frontier Center/JINA Center for the Evolution of the Elements (JINA-CEE), awarded by the US National Science Foundation. Funding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the US Department of Energy Office of Science, and the Participating Institutions. S.D.S.S. acknowledges support and resources from the Center for High-Performance Computing at the University of Utah. The SDSS web site is www.sdss.org. SDSS is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration including the Brazilian Participation Group, the Carnegie Institution for Science, Carnegie Mellon University, Center for Astrophysics \| Harvard & Smithsonian (CfA), the Chilean Participation Group, the French Participation Group, Instituto de Astrofisica de Canarias, The Johns Hopkins University, Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo, the Korean Participation Group, Lawrence Berkeley National Laboratory, Leibniz Institut fuer Astrophysik Potsdam (AIP), Max-Planck-Institut fuer Astronomie (MPIA Heidelberg), Max-Planck-Institut fuer Astrophysik (MPA Garching), Max-Planck-Institut fuer Extraterrestrische Physik (MPE), National Astronomical Observatories of China, New Mexico State University, New York University, University of Notre Dame, Observatorio Nacional/MCTI, The Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory, United Kingdom Participation Group, Universidad Nacional Autonoma de Mexico, University of Arizona, University of Colorado Boulder, University of Oxford, University of Portsmouth, University of Utah, University of Virginia, University of Washington, University of Wisconsin, Vanderbilt University, and Yale University.
D.L., R.Y., and R.W. would like to acknowledge support by the NSF grant AST-1715898. R.Y. would like to acknowledge support by the Hong Kong Global STEM Scholar scheme, by the Hong Kong Jockey Club through the JC STEM Lab of Astronomical Instrumentation program, by the Direct Grant of CUHK Faculty of Science, and by the Research Grant Council of the Hong Kong Special Administrative Region, China (Projects No. 14302522). T.C.B. acknowledges partial support for this work from grant PHY 14-30152; Physics Frontier Center/JINA Center for the Evolution of the Elements (JINA-CEE), awarded by the US National Science Foundation. Funding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the US Department of Energy Office of Science, and the Participating Institutions. S.D.S.S. acknowledges support and resources from the Center for High-Performance Computing at the University of Utah. The SDSS web site is www.sdss.org . SDSS is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration including the Brazilian Participation Group, the Carnegie Institution for Science, Carnegie Mellon University, Center for Astrophysics \| Harvard & Smithsonian (CfA), the Chilean Participation Group, the French Participation Group, Instituto de Astrofísica de Canarias, The Johns Hopkins University, Kavli Institute for the Physics and Mathematics of the Universe (IPMU) / University of Tokyo, the Korean Participation Group, Lawrence Berkeley National Laboratory, Leibniz Institut für Astrophysik Potsdam (AIP), Max-Planck-Institut für Astronomie (MPIA Heidelberg), Max-Planck-Institut für Astrophysik (MPA Garching), Max-Planck-Institut für Extraterrestrische Physik (MPE), National Astronomical Observatories of China, New Mexico State University, New York University, University of Notre Dame, Observatório Nacional / MCTI, The Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory, United Kingdom Participation Group, Universidad Nacional Autónoma de México, University of Arizona, University of Colorado Boulder, University of Oxford, University of Portsmouth, University of Utah, University of Virginia, University of Washington, University of Wisconsin, Vanderbilt University, and Yale University.

Agradecimiento

D.L., R.Y., and R.W. would like to acknowledge support by the NSF grant AST-1715898. R.Y. would like to acknowledge support by the Hong Kong Global STEM Scholar scheme, by the Hong Kong Jockey Club through the JC STEM Lab of Astronomical Instrumentation program, by the Direct Grant of CUHK Faculty of Science, and by the Research Grant Council of the Hong Kong Special Administrative Region, China (Projects No. 14302522). T.C.B. acknowledges partial support for this work from grant PHY 14-30152; Physics Frontier Center/JINA Center for the Evolution of the Elements (JINA-CEE), awarded by the US National Science Foundation. Funding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the US Department of Energy Office of Science, and the Participating Institutions. S.D.S.S. acknowledges support and resources from the Center for High-Performance Computing at the University of Utah. The SDSS web site is www.sdss.org. SDSS is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration including the Brazilian Participation Group, the Carnegie Institution for Science, Carnegie Mellon University, Center for Astrophysics | Harvard & Smithsonian (CfA), the Chilean Participation Group, the French Participation Group, Instituto de Astrofisica de Canarias, The Johns Hopkins University, Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo, the Korean Participation Group, Lawrence Berkeley National Laboratory, Leibniz Institut fuer Astrophysik Potsdam (AIP), Max-Planck-Institut fuer Astronomie (MPIA Heidelberg), Max-Planck-Institut fuer Astrophysik (MPA Garching), Max-Planck-Institut fuer Extraterrestrische Physik (MPE), National Astronomical Observatories of China, New Mexico State University, New York University, University of Notre Dame, Observatorio Nacional/MCTI, The Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory, United Kingdom Participation Group, Universidad Nacional Autonoma de Mexico, University of Arizona, University of Colorado Boulder, University of Oxford, University of Portsmouth, University of Utah, University of Virginia, University of Washington, University of Wisconsin, Vanderbilt University, and Yale University.

D.L., R.Y., and R.W. would like to acknowledge support by the NSF grant AST-1715898. R.Y. would like to acknowledge support by the Hong Kong Global STEM Scholar scheme, by the Hong Kong Jockey Club through the JC STEM Lab of Astronomical Instrumentation program, by the Direct Grant of CUHK Faculty of Science, and by the Research Grant Council of the Hong Kong Special Administrative Region, China (Projects No. 14302522). T.C.B. acknowledges partial support for this work from grant PHY 14-30152; Physics Frontier Center/JINA Center for the Evolution of the Elements (JINA-CEE), awarded by the US National Science Foundation. Funding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the US Department of Energy Office of Science, and the Participating Institutions. S.D.S.S. acknowledges support and resources from the Center for High-Performance Computing at the University of Utah. The SDSS web site is www.sdss.org . SDSS is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration including the Brazilian Participation Group, the Carnegie Institution for Science, Carnegie Mellon University, Center for Astrophysics | Harvard & Smithsonian (CfA), the Chilean Participation Group, the French Participation Group, Instituto de Astrofísica de Canarias, The Johns Hopkins University, Kavli Institute for the Physics and Mathematics of the Universe (IPMU) / University of Tokyo, the Korean Participation Group, Lawrence Berkeley National Laboratory, Leibniz Institut für Astrophysik Potsdam (AIP), Max-Planck-Institut für Astronomie (MPIA Heidelberg), Max-Planck-Institut für Astrophysik (MPA Garching), Max-Planck-Institut für Extraterrestrische Physik (MPE), National Astronomical Observatories of China, New Mexico State University, New York University, University of Notre Dame, Observatório Nacional / MCTI, The Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory, United Kingdom Participation Group, Universidad Nacional Autónoma de México, University of Arizona, University of Colorado Boulder, University of Oxford, University of Portsmouth, University of Utah, University of Virginia, University of Washington, University of Wisconsin, Vanderbilt University, and Yale University.