100 citations · 753 across the 28 of their papers we have counts for
8 papers · 1 filter
The pulsating hot subdwarf Balloon 090100001: results of the 2005 multisite campaign
A. Baran, R. Oreiro, A. Pigulski +28
We present the results of a multisite photometric campaign on the pulsating sdB star Balloon 090100001. The star is one of the two known hybrid hot subdwarfs with both long- and sh…
Can pulsational instabilities impact a massive star's rotational evolution?
Rich Townsend, Jim MacDonald
We investigate whether angular momentum transport due to unstable pulsation modes can play a significant role in the rotational evolution of massive stars. We find that these modes…
Excitation of g modes in Wolf-Rayet stars by a deep opacity bump
R H D Townsend, J MacDonald
We examine the stability of l=1 and l=2 g modes in a pair of nitrogen-rich Wolf-Rayet stellar models characterized by differing hydrogen abundances. We find that modes with interme…
Synthetic stellar populations: single stellar populations, stellar interior models and primordial proto-galaxies
Raul Jimenez, James MacDonald, James Dunlop +2
We present a new set of stellar interior and synthesis models for predicting the integrated emission from stellar populations in star clusters and galaxies of arbitrary age and met…
The cosmic production of Helium
Raul Jimenez, Chris Flynn, James MacDonald +1
We estimate the cosmic production rate of helium relative to metals () using K dwarf stars in the Hipparcos catalog with accurate spectroscopic metallicities. The best fitti…
CCD-based observations of PG 0856+121 and a theoretical analysis of its oscillation modes
A. Ulla, M. R. Zapatero Osorio, F. Perez Hernandez +1
BVRI CCD-based and near-IR (J) imaging, together with unfiltered photometry of the hot subdwarf B star PG 0856+121 are reported. Two close, faint, red, point-like sources are resol…