145 citations · 670 across the 28 of their papers we have counts for
6 papers · 1 filter
Discovery of a rapidly pulsating subdwarf B star candidate in omega Cen
S. K. Randall, A. Calamida, G. Bono
We report the discovery of the first variable extreme horizontal branch star in a globular cluster (omega Cen). The oscillation uncovered has a period of 114 s and an amplitude of…
Tidal synchronization of the subdwarf B binary PG 0101+039
S. Geier, S. Nesslinger, U. Heber +3
Tidally locked rotation is a frequently applied assumption that helps to measure masses of invisible compact companions in close binaries. The calculations of synchronization times…
Observations and asteroseismic analysis of the rapidly pulsating hot B subdwarf PG 0911+456
S. K. Randall, E. M. Green, V. Van Grootel +11
The principal aim of this project is to determine the structural parameters of the rapidly pulsating subdwarf B star PG 0911+456 from asteroseismology. Our work forms part of an on…
First Attempt at Spectroscopic Detection of Gravity Modes in a Long-Period Pulsating Subdwarf B Star -- PG 1627+017
B. -Q. For, E. M. Green, D. O'Donoghue +7
In the first spectroscopic campaign for a PG 1716 variable (or long-period pulsating subdwarf B star), we succeeded in detecting velocity variations due to g-mode pulsations at a l…
Exciting new features in the frequency spectrum of the EC14026 star HS0702+6043 - Simultaneous g-modes and p-modes in a sdB pulsator
S. Schuh, J. Huber, S. Dreizler +7
The discovery of a long-period g-mode oscillation in the previously known short-period p-mode sdB pulsator HS0702+6043 makes this star an extraordinary object, unique as a member o…
The Potential of Multi-Colour Photometry for Pulsating Subdwarf B Stars
S. K. Randall, G. Fontaine, P. Brassard +1
We investigate the potential of multi-colour photometry for partial mode identification in both long- and short-period variable subdwarf B stars. The technique presented is based o…