J/A+A/399/271ivo://CDS.VizieR/J/A+A/399/271doi:10.26093/cds/vizier.33990271CDSPinheiro F.J.G.Folha D.F.M.Marconi M.Ripepi V.Palla F.,Monteiro M.J.P.F.G.Bernabei S.2017-06-29T08:55:27Z2003-03-28T17:26:23ZCDS support team

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

cds-question@unistra.frvariable-starsvisible-astronomyWide-band photometrymedium-band-photometryWe report the discovery of periodicities in the light curve of the Pre-Main Sequence (PMS) Herbig Ae star V346 Ori. We interpret variations in the light curve of the star as the superposition of at least two periodic signals that result from delta Scuti-type stellar oscillations. The computation of linear non-adiabatic radial pulsation models for PMS stars reproduces these periods for a 1.55M_{sun}_ star with Teff=7410K and log(L/L_{sun}_)=0.74 pulsating in the fundamental and in the second overtone. If our assumption of radial oscillations is indeed correct, the star's location on the HR diagram places it at a distance significantly smaller than that of the Orion star forming region, hence raising questions regarding the evolutionary status of V346 Ori. Observations with better time sampling and spanning a longer period of time are needed if the latter question is to be addressed fully.2003A&A...399..271Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/399/271CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/399/271https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/399/271http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/399/271https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/399/271https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/399/271http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/399/271GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/399/271/table1De-trended and zero averaged Stroemgren u and v differential magnitudes of V346 Ori relative to HD 35409 and HD 35408recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJD-2451891uu-band Julian date (origin HJD=2451891)dtime.epochdoubleDu(V-8)V346 Ori differential u magnitude relative to HD 35408magphot.mag;arith.difffloatDu(V-9)V346 Ori differential u magnitude relative to HD 35409magphot.mag;arith.difffloatDu(8-9)HD 35408 differential u magnitude relative to HD 35409magphot.mag;arith.difffloatJD-2451891vv-band Julian date (origin HJD=2451891)magtime.epochdoubleDv(V-8)V346 Ori differential v magnitude relative to HD 35408magphot.mag;arith.difffloatDv(V-9)V346 Ori differential v magnitude relative to HD 35409magphot.mag;arith.difffloatDv(8-9)HD 35409 differential v magnitude relative to HD 35408magphot.mag;arith.difffloatJ/A+A/399/271/table2De-trended and zero averaged Johnson U, B and V differential magnitudes of V346 Ori relative to HD 35351recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJD-2452200UU-band Julian date (origin HJD=2452200)dtime.epochdoubleDU(V-1)U-band V346 Ori differential photometry relative to HD 35351magphot.mag;arith.difffloatJD-2452200BB-band Julian date (origin HJD=2452200)dtime.epochdoubleDB(V-1)B-band V346 Ori differential photometry relative to HD 35351magphot.mag;arith.difffloatJD-2452200VV-band Julian date (origin HJD=2452200)dtime.epochdoubleDV(V-1)V-band V346 Ori differential photometry relative to HD 35351magphot.mag;arith.difffloat