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Oscillations in Young Stellar Objects

Published online by Cambridge University Press:  12 April 2016

F.J.G. Pinheiro ,
D.F.M. Folha ,
M.J.P.F.G. Monteiro ,
M. Marconi ,
V. Ripepi  and
F. Palla
F.J.G. Pinheiro
Affiliation:
Centro de Astrofísica da Universidade do Porto, Porto, Portugal
D.F.M. Folha
Affiliation:
Centro de Astrofísica da Universidade do Porto, Porto, Portugal
M.J.P.F.G. Monteiro
Affiliation:
Centro de Astrofísica da Universidade do Porto, Porto, Portugal
M. Marconi
Affiliation:
Osservatorio Astronomico di Capodimonte, Napoli, Italy
V. Ripepi
Affiliation:
Osservatorio Astronomico di Capodimonte, Napoli, Italy
F. Palla
Affiliation:
Centro de Astrofísica da Universidade do Porto, Porto, Portugal

Abstract

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We report the discovery of periodicities in the light curve of the Herbig Ae star V346 Ori. We interpret these variations as the superposition of at least two signals with periods P1=42±6 min and P2=68±12 min resulting from stellar oscillations. The computation of linear non-adiabatic pulsation models for Pre-Main Sequence (PMS) stars reproduces these periods for a 1.5 M⊙ star with Teff= 7300 K and log L/L⊙= 0.74, pulsating in the fundamental and second overtones.

Type
Part 2.4. Delta Scuti Stars
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 352 - 353
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

Kovalchuk, G. & Pugach, A. 1997, A&A, 325, 1077 Google Scholar
Marconi, M. & Palla, F. 1998, ApJ, 507, L141 CrossRefGoogle Scholar
Marconi, M., Ripepi, V, Bernabei, S., Palla, F., Alcalá, J.M., Covino, E., & Terranegra, L. 2001, A&A, 372, L21 Google Scholar