2026-04-13T11:52:49Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1622612025-12-05T16:57:11Zcom_2072_1057col_2072_478823col_2072_478917

urn:hdl:2445/162261 Long period variable stars: galactic populations and infrared luminosity calibrations Mennessier, M. O. Mowlavi, N. Alvarez, R. Luri Carrascoso, Xavier Estels variables Cinemàtica galàctica Variable stars Galactic kinematics In this paper HIPPARCOS astrometric and kinematic data are used to calibrate both infrared lumi-nosities and kinematical parameters of Long Period Variable stars (LPVs). Individual absolute K and IRAS 12and 25 luminosities of 800 LPVs are determined and made available in electronic form?. The estimated meankinematics is analyzed in terms of galactic populations. LPVs are found to belong to galactic populations rangingfrom the thin disk to the extended disk. An age range and a lower limit of the initial mass is given for starsof each population. A di erence of 1.3 mag in K for the upper limit of the Asymptotic Giant Branch is foundbetween the disk and old disk galactic populations, con rming its dependence on the mass in the main sequence.LPVs with a thin envelope are distinguished using the estimated mean IRAS luminosities. The level of attraction(in the classi cation sense) of each group for the usual classifying parameters of LPVs (variability and spectraltypes) is examined 2020-05-25T10:34:37Z 2020-05-25T10:34:37Z 2001-08-15 2020-05-25T10:34:37Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: https://doi.org/10.1051/0004-6361:20010764 Astronomy & Astrophysics, 2001, vol. 374, num. 3, p. 968-979 https://doi.org/10.1051/0004-6361:20010764 (c) The European Southern Observatory (ESO), 2001 info:eu-repo/semantics/openAccess EDP Sciences Articles publicats en revistes (Física Quàntica i Astrofísica)