The O-C diagram of the subdwarf B pulsating star HS2201+2610: detection of a giant planet?
/ Authors
R. Silvotti, S. Schuh, R. Janulis, S. Bernabei, R. Ostensen, J. Solheim, I. Bruni, R. Gualandi, T. Oswalt, A. Bonanno
and 2 more authors
/ Abstract
In this article we present the O-C diagram of the hot subdwarf B pulsating star HS2201+2610 after seven years of observations. A secular increase of the main pulsation period, Pdot=(1.3+-0.1)x10**(-12), is inferred from the data. Moreover, a further sinusoidal pattern suggests the presence of a low-mass companion (Msini=~3.5 Mjup), orbiting the hot star at a distance of about 1.7 AU with a period near 1140 days.
Journal: arXiv: Astrophysics