J/MNRAS/487/4832ivo://CDS.VizieR/J/MNRAS/487/4832doi:10.26093/cds/vizier.74874832CDSChatys F.W.Bedding T.R.Murphy S.J.Kiss L.L.Dobie D.Grindlay J.E.2024-08-19T20:19:10Z2023-01-23T12:57:12ZCDS support team

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

cds-question@unistra.frlate-type-starssupergiant-starsinfrared-astronomyWe revisit the K-band period-luminosity (P-L) relations of Galactic red supergiants using Gaia Data Release 2 parallaxes and up to 70yr of photometry from AAVSO and ASAS campaigns. In addition, we examine 206 LMC red supergiants using 50yr of photometric data from the digitized Harvard Astronomical Plate Collection. We identified periods by computing power spectra and calculated the period-luminosity relations of our samples and compared them with the literature. Newly available data tighten the P-L relations substantially. Identified periods form two groups: one with periods of 300-1000d, corresponding to pulsations, and another with Long Secondary Periods between 1000 and 8000d. Among the 48 Galactic objects we find shorter periods in 25 stars and long secondary periods in 23 stars. In the LMC sample we identify 85 and 94 red supergiants with shorter and long secondary periods, respectively. The P-L relation of the Galactic red supergiants is in agreement with the red supergiants in both, the Large Magellanic Cloud and the Andromeda galaxy. We find no clear continuity between the known red giant period-luminosity sequences, and the red supergiant sequences investigated here.2019MNRAS.487.4832Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/487/4832CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/487/4832https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/487/4832http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/487/4832https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/487/4832https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/487/4832http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/487/4832GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/487/4832/table2 (Coordinates, K-band magnitude, period, and amplitude of our RSGs in the LMC)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/487/4832/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/487/4832/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/487/4832/table2?GETtext/xml+votable180.050000true72.3436-69.40960.0055555555555555565/8269 8275 6/33054 33091 33094-33098 33112-33113 33115 33123-33124 33136https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/487/4832?format=asciiInfrareddefaultJ/MNRAS/487/4832/table2Coordinates, K-band magnitude, period, and amplitude of our RSGs in the LMCrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/227] Source identifiermeta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainP1? First period identifieddtime.periodintnullableamp1? Amplitude associated to P1magmeta.id.assoc;phot.magfloatnullableP2? Second period identifieddtime.periodintnullableamp2? Amplitude associated to P2magmeta.id.assoc;phot.magfloatnullableP3? Third period identifieddtime.periodintnullableamp3? Amplitude associated to P3magmeta.id.assoc;phot.magfloatnullableKmagK-band magnitude from 2MASS (Cutri et al. 2003tmc..book.....C, Cat. II/246)magphot.mag;em.IR.Kfloate_KmagError on Kmagmagstat.error;phot.magfloatKMAGAbsolute K-band magnitude (1)magphot.magfloat