J/A+AS/140/55 Pulsation of galactic long-period variables (Barthes+, 1999) ================================================================================ Period-luminosity-colour distribution and classification of galactic oxygen-rich LPVs. I. Luminosity calibrations. Barthes D., Luri X., Alvarez R., Mennessier M. O. =1999A&AS..140...55B (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Stars, variable Keywords: stars: variables: long-period variables - AGB - fundamental parameters - kinematics - evolution Abstract: The 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. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file appenb.dat 56 357 List of the sample stars -------------------------------------------------------------------------------- See also: I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) II/214 : Combined General Catalogue of Variable Stars (Kholopov+ 1998) Byte-by-byte Description of file: appenb.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 6 I6 --- HIP Hipparcos ) code number 11- 18 A8 --- Name GCVS (Cat. ) name 23- 25 A3 --- Type Variability type 30- 35 F6.1 d Period Pulsation period 41- 50 A10 --- Rem Remarks: radial velocity or J mag unavailable -------------------------------------------------------------------------------- Acknowledgements: Dominique Barthes ================================================================================ (End) Patricia Bauer [CDS] 10-Sep-1999