Gaia's Cepheids and RR Lyrae stars and luminosity calibrations based on Tycho-Gaia Astrometric Solution

Gaia Data Release 1 contains parallaxes for more than 700 Galactic Cepheids and RR Lyrae stars, computed as part of the Tycho-Gaia Astrometric Solution (TGAS). We have used TGAS parallaxes, along with literature (V, I, J, Ks, W1) photometry and spectroscopy, to calibrate the zero point of the period...

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Detalhes bibliográficos
Autores: Clementini, Gisella, Eyer, Laurent, Muraveva, Tatiana, Garofalo, A., Ripepi, Vincenzo, Marconi, Marcella, Sarro, Luis M., Palmer, Max, Luri Carrascoso, Xavier, Molinaro, Roberto, Rimoldini, Lorenzo, Szabados, Laszlo, Anderson, Richard I., Musella, Ilaria
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/223596
Acesso em linha:https://hdl.handle.net/2445/223596
Access Level:acceso abierto
Palavra-chave:Fotometria astronòmica
Investigació astronòmica
Astrometria
Astronomical photometry
Astronomical research
Astrometry
Descrição
Resumo:Gaia Data Release 1 contains parallaxes for more than 700 Galactic Cepheids and RR Lyrae stars, computed as part of the Tycho-Gaia Astrometric Solution (TGAS). We have used TGAS parallaxes, along with literature (V, I, J, Ks, W1) photometry and spectroscopy, to calibrate the zero point of the period-luminosity and period-Wesenheit relations of classical and type II Cepheids, and the near-infrared period-luminosity, period-luminosity-metallicity and optical luminosity-metallicity relations of RR Lyrae stars. In this contribution we briefly summarise results obtained by fitting these basic relations adopting different techniques that operate either in parallax or distance (absolute magnitude) space

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