Pulsations from the G giant/sdO system HD 128220

Details Pulsations from the G giant/sdO system HD 128220 Pulsations from the G giant/sdO system HD 128220

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.485..305p&link_type=abstract

In: Proceedings of the First Eddington Workshop on Stellar Structure and Habitable Planet Finding, 11 - 15 June 2001, Córdoba, S

Computer Science

1

Stars: Oscillations, Stars: Binary Systems

Scientific paper

Within the framework of a large campaign of observations of hot subdwarfs, we report the discovery of small-amplitude, rapid light variations in the object HD 128220. The variations could be due either to pulsations of the sdO star, placed in a binary system, either to the G subgiant companion. Owing to the small amplitude of the oscillations, the possibility of performing conclusive observations by terrestrial telescopes is very low; our opinion is that this system could be a good candidate for Eddington observations. The variability of this object, if referred to the B component, would suggest the possible existence of a new class of pulsators lying between the EC 14026 and the hooter GW Vir stars.

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