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Issue A&A
Volume 372, Number 1, June II 2001
Page(s) L21 - L24
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20010554



A&A 372, L21-L24 (2001)
DOI: 10.1051/0004-6361:20010554

New observations of the pulsating PMS star V351 Ori

M. Marconi1, V. Ripepi1, S. Bernabei2, 3, F. Palla4, J. M. Alcalà1, E. Covino1 and L. Terranegra1

1  Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli, Italy
2  Osservatorio Astronomico di Bologna, Via Ranzani 1, 40127 Bologna, Italy
3  Dipartimento de Astrofísica, Universidad de La Laguna, Avda. Astrofisico F. Sànchez sn, 30071 La Laguna, Spain
4  Osservatorio Astrofisico di Arcetri, Largo E. Fermi, 5, 50125 Firenze, Italy

(Received 23 March 2001 / Accepted 17 April 2001)

Abstract
We present new precise photoelectric observations of the Pre-Main-Sequence $\delta$ Scuti star, V351 Ori. These new data show that V351 Ori pulsates in a mixture of several radial modes (at least four). The comparison between observations and detailed pulsational models, allows us to provide independent constraints on the mass and luminosity of the star. The predicted distance is 210 pc, indicating that V351 Ori is much closer than the Orion star forming region. With an inferred mass of ~1.8 $M_\odot$ and an uncertain evolutionary stage, V351 Ori represents an excellent candidate for future asteroseismological studies that will assess whether it is a young PMS star (~6 Myr) or an evolved object (~1 Gyr) leaving the main-sequence.


Key words: stars: variables: $\delta$ Scuti -- stars: oscillations -- stars: fundamental parameters

Offprint request: V. Ripepi, ripepi@na.astro.it

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© ESO 2001


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