Selection of a sample of bright southern Slowly Pulsating B Stars for long-term photometric and spectroscopic monitoring

Details Selection of a sample of bright southern Slowly Pulsating B Stars for long-term photometric and spectroscopic monitoring Selection of a sample of bright southern Slowly Pulsating B Stars for long-term photometric and spectroscopic monitoring

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...343..872a&link_type=abstract

Astronomy and Astrophysics, v.343, p.872-882 (1999)

Astronomy and Astrophysics

Astrophysics

53

Stars: Variables: General, Stars: Binaries: Spectroscopic, Stars: Oscillations, Stars: Early-Type

Scientific paper

The photometric experiment on Hipparcos has led to the discovery of, among other types of variables, a large amount of new Slowly Pulsating B Stars. We have selected twelve bright southern stars of this sample, together with five previously known Slowly Pulsating B Stars, for spectroscopic and photometric monitoring. These seventeen stars have spectral types ranging from B 2 up to B 9 and thus fully cover the instability strip. We here present the results of a preliminary analysis of our data and show that our sample is an extremely important one to perform seismology of intermediate-massive stars. In particular, we find that all but one of the selected stars exhibit clear line-profile variability. The broader-lined Slowly Pulsating B Stars tend to have more complex line-profile variations. One of the previously known Slowly Pulsating B stars was known to be a binary. Besides this star, another six of the selected Slowly Pulsating B stars turn out to be multiple systems. Five of these seven binaries have large rotational velocities and complicated line-profile variations with moving subfeatures. It is not yet clear whether or not the binarity results in a particular spectrum of excited modes. Based on observations collected with the CAT Telescope of the European Southern Observatory and with the Swiss Photometric Telescope of the Geneva Observatory, both situated at La Silla in Chile

Affiliated with

Also associated with

No associations

Rating

Selection of a sample of bright southern Slowly Pulsating B Stars for long-term photometric and spectroscopic monitoring 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 Selection of a sample of bright southern Slowly Pulsating B Stars for long-term photometric and spectroscopic monitoring, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Selection of a sample of bright southern Slowly Pulsating B Stars for long-term photometric and spectroscopic monitoring will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1442371