Gaia Focused Product Release: Radial velocity time series of long-period variables

Trabucchi, M., Mowlavi, N., T. Lebzelter, T., Lecoeur-Taibi, I y Sarro Baro, Luis Manuel . (2023) Gaia Focused Product Release: Radial velocity time series of long-period variables. Astronomy & Astrophysics

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Título Gaia Focused Product Release: Radial velocity time series of long-period variables
Autor(es) Trabucchi, M.
Mowlavi, N.
T. Lebzelter, T.
Lecoeur-Taibi, I
Sarro Baro, Luis Manuel
Materia(s) Ingeniería Informática
Abstract Context. The third Gaia Data Release (DR3) provided photometric time series of more than 2 million long-period variable (LPV) candidates. Anticipating the publication of full radial-velocity data planned with Data Release 4, this Focused Product Release (FPR) provides radial-velocity time series for a selection of LPV candidates with high-quality observations. Aims. We describe the production and content of the Gaia catalog of LPV radial-velocity time series, and the methods used to compute the variability parameters published as part of the Gaia FPR. Methods. Starting from the DR3 catalog of LPV candidates, we applied several filters to construct a sample of sources with highquality radial-velocity measurements. We modeled their radial-velocity and photometric time series to derive their periods and amplitudes, and further refined the sample by requiring compatibility between the radial-velocity period and at least one of the G, GBP, or GRP photometric periods. Results. The catalog includes radial-velocity time series and variability parameters for 9614 sources in the magnitude range 6 ≲ G/mag ≲ 14, including a flagged top-quality subsample of 6093 stars whose radial-velocity periods are fully compatible with the values derived from the G, GBP, and GRP photometric time series. The radial-velocity time series contain a mean of 24 measurements per source taken unevenly over a duration of about three years. We identify the great majority of the sources (88%) as genuine LPV candidates, with about half of them showing a pulsation period and the other half displaying a long secondary period. The remaining 12% of the catalog consists of candidate ellipsoidal binaries. Quality checks against radial velocities available in the literature show excellent agreement. We provide some illustrative examples and cautionary remarks. Conclusions. The publication of radial-velocity time series for almost ten thousand LPV candidates constitutes, by far, the largest such database available to date in the literature. The availability of simultaneous photometric measurements gives a unique added value to the Gaia catalog.
Palabras clave stars: AGB and post
AGB
stars
variables: general
stars: carbon
methods: data analysis
catalogs
techniques: radial velocities
Editor(es) EDP Sciences
Fecha 2023-12-08
Formato application/pdf
Identificador bibliuned:95-Lmsarro-0010
http://e-spacio.uned.es/fez/view/bibliuned:95-Lmsarro-0010
DOI - identifier https://doi.org/10.1051/0004-6361/202347287
ISSN - identifier 1432-0746
Nombre de la revista Astronomy & Astrophysics
Número de Volumen 680
Número de Issue A38
Publicado en la Revista Astronomy & Astrophysics
Idioma eng
Versión de la publicación publishedVersion
Tipo de recurso Article
Derechos de acceso y licencia http://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
Tipo de acceso Acceso abierto
Notas adicionales La versión registrada de este artículo, publicado por primera vez en Astronomy & Astrophysics (2023) 680 -A36, está disponible en línea en el sitio web del editor: Astronomy & Astrophysics; https://doi.org/10.1051/0004-6361/202347287
Notas adicionales The registered version of this paper, first published in Astronomy & Astrophysics (2023) 680-A36, is available online at the publisher's website: Astronomy & Astrophysics; https://doi.org/10.1051/0004-6361/202347287

 
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Creado: Mon, 19 Feb 2024, 23:26:13 CET