2026-04-23T18:38:54Zivo://CDS.VizieR/J/A+A/403/9932025-06-13T15:25:00ZJ.A_AIVOARevised HIP periods for long-period variablesWe analyse the K-band luminosities of a sample of galactic long-period variables using parallaxes measured by the Hipparcos mission. The parallaxes are in most cases re-computed from the Hipparcos Intermediate Astrometric Data using improved astrometric fits and chromaticity corrections. The K band magnitudes are taken from the literature and from measurements by COBE, and are corrected for interstellar and circumstellar extinction. The sample contains stars of several spectral types: M, S and C, and of several variability classes: Mira, semiregular SRa, and SRb. We find that the distribution of stars in the period-luminosity plane is independent of circumstellar chemistry, but that the different variability types have different P-L distributions. Both the Mira variables and the SRb variables have reasonably well-defined period-luminosity relationships, but with very different slopes. The SRa variables are distributed between the two classes, suggesting that they are a mixture of Miras and SRb, rather than a separate class of stars. New period-luminosity relationships are derived based on our revised Hipparcos parallaxes. The Miras show a similar period-luminosity relationship to that found for Large Magellanic Cloud Miras by Feast et al. (1989MNRAS.241..375F).late-type-starsvariable-starsvisible-astronomytrigonometric-parallaxstellar-astronomyobservational-astronomyhttps://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/403/993http://doi.org/10.26093/cds/vizier.34030993https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/403/9932003A&A...403..993Khttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/403/993Cone search capability for table J/A+A/403/993/table1 (Stars for which a new solution based on the Hipparcos observations was derived)Knapp G.R.Pourbaix D.Platais I.Jorissen A.CDS2003https://cds.unistra.fr/vizier-org/licences_vizier.htmlCDS support team <cds-question@unistra.fr>DatasetAstroObjectsastronomy