Oscillations in the PMS star V346 Ori

DOI

We 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.

Identifier
DOI http://doi.org/10.26093/cds/vizier.33990271
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/399/271
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/399/271
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/399/271
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/399/271
Provenance
Creator Pinheiro F.J.G.; Folha D.F.M.; Marconi M.; Ripepi V.; Palla F.,Monteiro M.J.P.F.G.; Bernabei S.
Publisher CDS
Publication Year 2003
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy