CP stars: Photometric calibrations of luminosity using Hipparcos data

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dc.creatorFigueras, F.
dc.creatorLuri, X.
dc.creatorGomez, A. E.
dc.creatorTorra, J.
dc.creatorJordi, C.
dc.creatorMennessier, M. O.
dc.creatorDomingo, A.
dc.creatorMasana, E.
dc.creatorGrenier, S.
dc.creatorBlasi, F.
dc.date1998-05-04
dc.date.accessioned2026-07-07T02:26:44Z
dc.date.available2026-07-07T02:26:44Z
dc.descriptionThe application of the Stromgren photometric luminosity calibrations to different types of CP stars is reexamined in the light of the new Hipparcos data. A first attempt is made to use the LM statistical parallax method (Luri et al., 1996) -- based on the maximum likelihood principle -- to obtain a calibration of the absolute magnitude as a function of two Stromgren colour indices, thus reflecting effective temperature and evolution. Its application to a sample of Si stars and to a sample of normal main sequence stars in the same spectral range allows us to compare the calibrations obtained and to discuss the position of Si stars in the HR diagram. Additionally, a sample of bonafide, spectroscopically selected Am stars together with normal main sequence stars are used to derive a new absolute magnitude calibration for late A-type main sequence stars, taking into account the effects of evolution, metallicity and stellar rotation.
dc.description8 pages, 2 figures, to appear in: Proc. of the 26th workshop of the European Working Group on CP stars, eds. P. North, A. Schnell and J. Ziznovsky, Contrib. Astr. Obs. Skalnate Pleso Vol. 27, No 3
dc.identifierhttps://arxiv.org/abs/astro-ph/9805016
dc.identifierhttp://arxiv.org/abs/astro-ph/9805016
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/12398
dc.subjectAstrophysics
dc.titleCP stars: Photometric calibrations of luminosity using Hipparcos data
dc.typetext

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