The O--C Diagram of the Subdwarf B Pulsating Star HS 2201+2610: Detection of a Giant Planet?
Abstract
In this article we present the O-C diagram of the hot subdwarf B pulsating star HS 2201+2610 after seven years of observations. A secular increase of the main pulsation period, dot{P}= (1.3± 0.1) × 10-12, is inferred from the data. Moreover, a further sinusoidal pattern suggests the presence of a low-mass companion (M sin i ≃ 3.5 MJup), orbiting the hot star at a distance of about 1.7 AU with a period near 1140 days.
- Publication:
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15th European Workshop on White Dwarfs
- Pub Date:
- September 2007
- arXiv:
- arXiv:astro-ph/0703753
- Bibcode:
- 2007ASPC..372..369S
- Keywords:
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- Astrophysics
- E-Print:
- 4 pages, 1 figure, ASP conf. series