The occultation events of the Herbig Ae/Be star V1247 Ori

Details The occultation events of the Herbig Ae/Be star V1247 Ori The occultation events of the Herbig Ae/Be star V1247 Ori

2010-02-22

arxiv.org/abs/1002.4092v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

A&A Letters, in press

Scientific paper

Aims: I study new deep (DeltaV ~ 1.20-1.65 mag) occultation events of the delta Scuti, Herbig Ae/Be star V1247 Ori in the Ori OB1 b association. Methods: I use the V-band ASAS light curve of V1247 Ori, which covers the last nine years, together with photometric data in the near-ultraviolet, visible, near-, and far-infrared taken from the literature. I carry out a periodogram analysis of the "cleaned" light curve and construct the spectral energy distribution of the star. Results: The star V1247 Ori is interesting for the study of the UX Orionis phenomenon, in which Herbig Ae/Be stars are occulted by their protoplanetary discs, for three reasons: brightness (V ~ 9.85 mag), large infrared excess at 20-100 mum (F_60 ~ 10 Jy), and photometric stability out of occultation (sigma(V) ~ 0.02 mag), which may help to determine the location and spatial structure of the occulting disc clumps.

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