Gaia Data Release 3. The Galaxy in your preferred colours: Synthetic photometry from Gaia low-resolution spectra

Montegriffo, P., Bellazzini, M., Angeli, F. De y Sarro Baro, Luis Manuel . (2023) Gaia Data Release 3. The Galaxy in your preferred colours: Synthetic photometry from Gaia low-resolution spectra. Astronomy & Astrophysics Vol 674, A33

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Título Gaia Data Release 3. The Galaxy in your preferred colours: Synthetic photometry from Gaia low-resolution spectra
Autor(es) Montegriffo, P.
Bellazzini, M.
Angeli, F. De
Sarro Baro, Luis Manuel
Materia(s) Ingeniería Informática
Abstract Gaia Data Release 3 provides novel ux-calibrated low-resolution spectrophotometry for '220 million sources in the wavelength range 330 nm ≤ λ ≤ 1050 nm (XP spectra). Synthetic photometry directly tied to a ux in physical units can be obtained from these spectra for any passband fully enclosed in this wavelength range. We describe how synthetic photometry can be obtained from XP spectra, illustrating the performance that can be achieved under a range of dierent conditions – for example passband width and wavelength range – as well as the limits and the problems aecting it. Existing top-quality photometry can be reproduced within a few per cent over a wide range of magnitudes and colour, for wide and medium bands, and with up to millimag accuracy when synthetic photometry is standardised with respect to these external sources. Some examples of potential scientic application are presented, including the detection of multiple populations in globular clusters, the estimation of metallicity extended to the very metal-poor regime, and the classication of white dwarfs. A catalogue providing standardised photometry for '2.2×108 sources in several wide bands of widely used photometric systems is provided (Gaia Synthetic Photometry Catalogue; GSPC) as well as a catalogue of '105 white dwarfs with DA/non-DA classication obtained with a Random Forest algorithm (Gaia Synthetic Photometry Catalogue for White Dwarfs; GSPC-WD).
Palabras clave catalogs
surveys
techniques: photometric
techniques: spectroscopic
stars: general
Galaxy: general
Editor(es) EDP Sciences
Fecha 2023-06-16
Formato application/pdf
Identificador bibliuned:95-Lmsarro-0012
http://e-spacio.uned.es/fez/view/bibliuned:95-Lmsarro-0012
DOI - identifier https://doi.org/10.1051/0004-6361/202243709
ISSN - identifier 1432-0746
Nombre de la revista Astronomy & Astrophysics (A&A)
Número de Volumen 674
Número de Issue A33
Publicado en la Revista Astronomy & Astrophysics Vol 674, A33
Idioma eng
Versión de la publicación acceptedVersion
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) Vol. 674, A33, está disponible en línea en el sitio web del editor: EDP Sciences, https://doi.org/10.1051/0004-6361/202243709
Notas adicionales The registered version of this paper, first published in Astronomy & Astrophysics (2023) Vol.674, A33, is available online at the publisher's website: EDP Sciences, https://doi.org/10.1051/0004-6361/202243709

 
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Creado: Tue, 12 Mar 2024, 20:09:47 CET