Publication
Title
Selection of a sample of bright southern Slowly Pulsating B Stars for long-term photometric and spectroscopic monitoring
Author
Abstract
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 B2 up to B9 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.
Language
English
Source (journal)
Astronomy and astrophysics. - Berlin, 1969, currens
Publication
Berlin : Springer, 1999
ISSN
0004-6361 [print]
1432-0746 [online]
Volume/pages
343:3(1999), p. 872-882
ISI
000079495100028
Full text (open access)
UAntwerpen
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 26.04.2018
Last edited 16.09.2021