2003A&A...399..271P


Query : 2003A&A...399..271P

2003A&A...399..271P - Astronomy and Astrophysics, volume 399, 271-274 (2003/2-3)

Oscillations in the PMS δ Scuti star V346 Ori.

PINHEIRO F.J.G., FOLHA D.F.M., MARCONI M., RIPEPI V., PALLA F., MONTEIRO M.J.P.F.G. and BERNABEI S.

Abstract (from CDS):

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 δ Scuti-type stellar oscillations. The computation of linear non-adiabatic radial pulsation models for PMS stars reproduces these periods for a 1.55M star with Teff=7410K and log L/L=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.

Abstract Copyright:

Journal keyword(s): stars: evolution - stars: fundamental parameters - stars: oscillations - stars: pre-main sequence - stars: variables: δ Sct - stars: individual: V346 Ori

VizieR on-line data: <Available at CDS (J/A+A/399/271): table1.dat table2.dat>

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HD 35351 * 05 24 13.0059857898 +01 46 42.052210018   9.03 9.02     B9V 13 0
2 HD 35408 * 05 24 36.6205860113 +01 48 03.490970890   8.97 8.94     A0V 10 0
3 HD 35409 * 05 24 38.6159584747 +01 48 38.849080659   8.26 8.31     B8V 12 0
4 HD 287841 Y*O 05 24 42.8031051407 +01 43 48.249517233 10.55 10.45 10.17 9.99 9.80 A8V 92 0
5 V* V351 Ori Ae* 05 44 18.7949420603 +00 08 40.411665342 9.44 9.22 8.87     A7V 101 0
6 V* V856 Sco Ae* 16 08 34.2868591379 -39 06 18.326059778 7.66 7.41 7.05 6.92   A7IIIne_sh 360 0

    Equat.    Gal    SGal    Ecl

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2021.07.25-18:41:46

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