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Verfasst von:Yu, Jie [VerfasserIn]   i
 Khanna, Shourya [VerfasserIn]   i
 Themeßl, Nathalie [VerfasserIn]   i
 Hekker, Saskia [VerfasserIn]   i
 Dréau, Guillaume [VerfasserIn]   i
 Gizon, Laurent [VerfasserIn]   i
 Bi, Shaolan [VerfasserIn]   i
Titel:Revised extinctions and radii for 1.5 million stars observed by APOGEE, GALAH, and RAVE
Verf.angabe:Jie Yu, Shourya Khanna, Nathalie Themessl, Saskia Hekker, Guillaume Dréau, Laurent Gizon, and Shaolan Bi
E-Jahr:2023
Jahr:1 February 2023
Umfang:19 S.
Titel Quelle:Enthalten in: The astrophysical journal. Supplement series
Ort Quelle:London : Institute of Physics Publ., 1996
Jahr Quelle:2023
Band/Heft Quelle:264(2023), 2, Artikel-ID 41, Seite 1-19
ISSN Quelle:1538-4365
Abstract:Asteroseismology has become widely accepted as a benchmark for accurate and precise fundamental stellar properties. It can therefore be used to validate and calibrate stellar parameters derived from other approaches. Meanwhile, one can leverage large-volume surveys in photometry, spectroscopy, and astrometry to infer stellar parameters over a wide range of evolutionary stages, independently of asteroseismology. Our pipeline, SEDEX (https://github.com/Jieyu126/SEDEX), compares the spectral energy distribution predicted by the MARCS and BOSZ model spectra with 32 photometric bandpasses, combining data from nine major, large-volume photometric surveys. We restrict the analysis to targets with available spectroscopy from the APOGEE, GALAH, and RAVE surveys to lift the temperature−extinction degeneracy. The cross-survey atmospheric parameter and uncertainty estimates are homogenized with artificial neural networks. Validation of our results with CHARA interferometry, Hubble Space Telescope CALSPEC spectrophotometry, and asteroseismology shows that we achieve high precision and accuracy. We present a catalog of improved interstellar extinction ( 0.14 mag) and stellar radii (σ R /R ≃ 7.4%) for ∼1.5 million stars in the low-to-high-extinction (A V ≲ 6 mag) fields observed by the spectroscopic surveys. We derive global extinctions for 184 Gaia DR2 open clusters and confirm the differential extinction in NGC 6791 and NGC 6819, which have been subject to extensive asteroseismic analysis. Furthermore, we report 36,854 double-lined spectroscopic main-sequence binary candidates. This catalog will be valuable for providing constraints on detailed modeling of stars and for constructing 3D dust maps of the Kepler field, the TESS Continuous Viewing Zones, and the PLATO long-duration observation fields.
DOI:doi:10.3847/1538-4365/acabc8
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

kostenfrei: Volltext: https://doi.org/10.3847/1538-4365/acabc8
 kostenfrei: Volltext: https://dx.doi.org/10.3847/1538-4365/acabc8
 DOI: https://doi.org/10.3847/1538-4365/acabc8
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1844716503
Verknüpfungen:→ Zeitschrift

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