High State of Hα Emission Activity of the Herbig Be Star HD 200775

Details High State of Hα Emission Activity of the Herbig Be Star HD 200775 High State of Hα Emission Activity of the Herbig Be Star HD 200775

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998pasp..110..883m&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 110, Issue 750, pp. 883-887.

Astronomy and Astrophysics

Astronomy

13

Stars: Circumstellar Matter, Stars: Individual: Henry Draper Number: Hd 200775, Stars: Pre-Main-Sequence

Scientific paper

We present the results of high-resolution spectroscopic observations of the pre-main-sequence Herbig Be star HD 200775 obtained between 1994 September and 1998 February. Strong variations of the Hα line associated with an extended period of strong emission during the summer and fall of 1997 have been observed. The line equivalent width took on the highest value reported in the last 20 yr. A review of the observational literature dating back to 1977 indicates periodic behavior of the Hα equivalent width with a period of 3.68 yr. These variations might be due to interaction between the stellar wind and the protostellar envelope, as suggested previously by Beskrovnaya et al., or to an effect of a possible close companion, such as those detected in some classical Be stars. The next high emission state is predicted to occur in the first half of 2001. We emphasize the importance of coordinated photometric and high-resolution spectroscopic observations for further understanding of the star's behavior.

Affiliated with

Also associated with

No associations

Rating

High State of Hα Emission Activity of the Herbig Be Star HD 200775 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 High State of Hα Emission Activity of the Herbig Be Star HD 200775, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High State of Hα Emission Activity of the Herbig Be Star HD 200775 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1537895