Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004pasj...56s.183u&link_type=abstract
Publications of the Astronomical Society of Japan, Vol.56, No.SP1, pp. S183-S192
Astronomy and Astrophysics
Astronomy
Stars: Circumstellar Matter, Stars: Individual (Misv1147), Stars: Pre-Main Sequence
Scientific paper
We report on the discovery of a new variable star, MisV1147, by the MISAO Project and its unusual photometric variations. The light curve of the object is characterized by two distinct states, that is, a relatively calm, bright state and an active state during which repetitive fadings with large amplitudes of ˜ 2 mag were observed. The fading events were associated with optical reddening. The object is identified with a catalogued Hα emission star, which has been confirmed by our spectroscopic observations. The Hα emission line is narrow and symmetric both in the bright and faint phases. The object has infrared colors analogous to T Tau stars or Herbig Ae/Be stars. In conjunction with the detection of a NaD absorption line and its position close to Cep OB1, we conclude that MisV1147 is a Herbig Be star with its spectral type of B2. Its optical-infrared spectral energy distribution is typical for Herbig Ae/Be stars, which supports this classification. The overall properties of the light curve are reminiscent of a UX Ori sub-group, showing Algol-type minima. The most noteworthy feature of MisV1147 is that it has a spectral type B2, whereas known UX Ori stars have spectral types later than B8. The object, furthermore, has one of the largest amplitudes of variations among known Herbig Ae/Be stars. Hence the object breaks the very strong correlation between the variation amplitude and the spectral type. This implies that dust clumps in circumstellar matter can significantly obscure a central object even in the early-type system.
Dubovsky Pavol A.
Fujii Mitsugu
Greaves John
Henden Arne A.
Ishioka Ryoko
No associations
LandOfFree
Deep Fading of the New Herbig Be Star MisV1147 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 Deep Fading of the New Herbig Be Star MisV1147, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Deep Fading of the New Herbig Be Star MisV1147 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1028585