Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2009-03-26
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
Accepted for publication on A&A. 14 Pages, 11 Figures
Scientific paper
CONTEXT: The study of pulsation in Pre--Main--Sequence intermediate-mass stars represents an important tool for deriving information on fundamental stellar parameters and internal structure, as well as for testing current theoretical models. Interest in this class of variable stars has significantly increased during the last decade and about 30 members are presently known in the literature. AIMS: We have constructed the frequency spectrum of the oscillations in V346 Ori. We apply asteroseismic tools to these data to estimate the intrinsic parameters (mass, luminosity, effective temperature) of V346 Ori and to obtain information on its internal structure. METHODS: CCD time series photometry in the Johnson V filter has been obtained for a total of 145.7 h of observations distributed over 36 nights. The resulting light curves have been subjected to a detailed frequency analysis using updated numerical techniques. Photometric and spectroscopic data have also been acquired to determine reliable estimates of the stellar properties. RESULTS: We have identified 13 oscillation frequencies, 6 of which with higher significance. These have been compared with the predictions of non-radial adiabatic models. The resulting best fit model has a mass of 2.1$\pm$0.2 $M_{\odot}$, luminosity $\log{L/L_{\odot}}=1.37^{+0.11}_{-0.13}$, and effective temperature 7300$\pm$200 K. These values are marginally consistent with the association of V346 Ori to Orion OB1a. Alternatively, V346 Ori could be placed at a slightly larger distance than previously estimated.
Aceituno Francisco J.
Amado Pedro J.
Bernabei Stefano
Catanzaro Giovanni
Leccia Silvio
No associations
LandOfFree
Multisite photometry of the pulsating Herbig Ae star V346 Ori does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Multisite photometry of the pulsating Herbig Ae star V346 Ori, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multisite photometry of the pulsating Herbig Ae star V346 Ori will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-64587