Pulsations in the late-type B supergiant star HD 202850†
Abstract
HD 202850 is a late B-type supergiant. It is known that photospheric lines of such stars vary. Due to macroturbulence the lines are much wider than expected. Macroturbulence has been linked to stellar pulsations. It has been reported that there are several B supergiants that undergo pulsations. In our previous work, we detected a pulsational period of 1.59 hours in this object from data taken with the Ondřejov 2-m telescope. We continued to investigate this object and we took several time series with the DAO 1.2-m telescope. Our new data suggest that there may be some additional pulsational periods in this star. We present our new results in this poster.
- Publication:
-
Precision Asteroseismology
- Pub Date:
- February 2014
- DOI:
- 10.1017/S1743921313015263
- arXiv:
- arXiv:1309.6175
- Bibcode:
- 2014IAUS..301..503T
- Keywords:
-
- stars: supergiants;
- oscillations;
- late-type;
- techniques: spectroscopic;
- radial velocities;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 2 pages, 1 figure, small corrections performed, published in IAU Symp. 301: Precision Asteroseismology, eds. J. Guzik, W. Chaplin, G. Handler, A. Pigulski, p. 503-504