We present results on the second-faintest pulsating subdwarf B (sdB) star known, RAT J0455+1305, derived from photometric data obtained in 2009. It shows both short and long periods 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 Balloon 090100001 in that it exhibits short-period mode groupings, which can be used to identify pulsation parameters and constrain theoretical models.
@article{arxiv.1103.1600,
title = {RAT J0455+1305: A rare hybrid pulsating subdwarf B star},
author = {A. S. Baran and J. T. Gilker and L. Fox-Machado and M. D. Reed and S. D. Kawaler},
journal= {arXiv preprint arXiv:1103.1600},
year = {2015}
}