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

TL;DR

This study analyzes nine years of photometric data of the Herbig Ae/Be star V1247 Ori, focusing on deep occultation events to understand the structure of its protoplanetary disc and the UX Orionis phenomenon.

Contribution

It provides detailed analysis of occultation events and spectral energy distribution, offering insights into the disc structure of V1247 Ori and the UX Orionis phenomenon.

Findings

Identification of deep occultation events with DeltaV ~ 1.20-1.65 mag.

V1247 Ori exhibits large infrared excess and photometric stability outside occultations.

Potential to determine the location and structure of disc clumps causing occultations.

Abstract

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.