J/A+AS/140/55ivo://CDS.VizieR/J/A+AS/140/55CDSBarthes D.Luri X.Alvarez R.Mennessier M. O.1999-12-06T14:28:48Z1999-12-06T15:27:34ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frvariable-starsThe absolute K magnitudes and kinematic parameters of about 350 oxygen-rich Long-Period Variable stars are calibrated, by means of an up-to-date maximum-likelihood method, using Hipparcos parallaxes and proper motions together with radial velocities and, as additional data, periods and V-K colour indices. Four groups, differing by their kinematics and mean magnitudes, are found. For each of them, we also obtain the distributions of magnitude, period and de-reddened colour of the base population, as well as de-biased period-luminosity-colour relations and their two-dimensional projections. The SRa semiregulars do not seem to constitute a separate class of LPVs. The SRb appear to belong to two populations of different ages. In a PL diagram, they constitute two evolutionary sequences towards the Mira stage. The Miras of the disk appear to pulsate on a lower-order mode. The slopes of their de-biased PL and PC relations are found to be very different from the ones of the Oxygen Miras of the LMC. This suggests that a significant number of so-called Miras of the LMC are misclassified. This also suggests that the Miras of the LMC do not constitute a homogeneous group, but include a significant proportion of metal-deficient stars, suggesting a relatively smooth star formation history. As a consequence, one may not trivially transpose the LMC period-luminosity relation from one galaxy to the other.1999A&AS..140...55Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/140/55CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/239 : The Hipparcos and Tycho Catalogues (ESA 1997)II/214 : Combined General Catalogue of Variable Stars (Kholopov+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/140/55https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/140/55http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/140/55https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/140/55https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/140/55http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/140/55GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+AS/140/55/appenbList of the sample starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intLinkcharHIPHipparcos <Cat. <I/239>) code numberintNameGCVS (Cat. <II/214>) namecharTypeVariability typecharPeriodPulsation perioddfloatRemRemarks: radial velocity or J mag unavailablechar