We present results on the second faintest pulsating subdwarf B (sdB) star, RATJ0455+1305, derived from photometric data obtained in 2009. It shows both short- and long-period oscillations, theoretically assigned as pressure and gravity modes. We identify six short-period frequencies (with one being a combination) and six long-period frequencies. This star is the fourth hybrid sdB star discovered so far which makes it of special interest as each type of mode probes a different part of the star. This star is similar to the sdB hybrid pulsator Balloon090100001 in that it exhibits short-period mode groupings, which can be used to identify pulsation parameters and constrain theoretical models.
Physics, Astronomy, and Materials Science
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©2011 the authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Baran, A. S., J. T. Gilker, L. Fox-Machado, M. D. Reed, and S. D. Kawaler. "RAT J0455+ 1305: a rare hybrid pulsating subdwarf B star." Monthly Notices of the Royal Astronomical Society 411, no. 2 (2011): 776-780.
Monthly Notices of the Royal Astronomical Society