65 citations · 372 across the 13 of their papers we have counts for
14 papers
The fastest hot subdwarfs revisited
Ulrich Heber
Hyper-velocity stars (HVS) are enigmatic objects because they are travelling so fast that they escape from the Galaxy. Among hot subdwarfs, only one such star is known, the He-sdO…
The OmegaWhite Survey for Short-Period Variable Stars VII: High amplitude, short period blue variables
G. Ramsay, P. A. Woudt, T. Kupfer +11
Blue Large Amplitude Pulsators (BLAPs) are a relatively new class of blue variable stars showing periodic variations in their light curves with periods shorter than a few tens of m…
The origin of early-type runaway stars from open clusters
Aakash Bhat, Andreas Irrgang, Ulrich Heber
Runaway stars are ejected from their place of birth in the Galactic disk, with some young B-type runaways found several tens of kiloparsecs from the plane traveling at speeds beyon…
Kinematic properties of white dwarfs. Galactic orbital parameters and age-velocity dispersion relation
R. Raddi, S. Torres, A. Rebassa-Mansergas +9
We present the first detailed 3D kinematic analysis of a sample of 3133 white dwarfs that use Gaia astrometry plus radial velocities, which were measured either by Gaia or by groun…
Discovery of a double detonation thermonuclear supernova progenitor
Thomas Kupfer, Evan B. Bauer, Jan van Roestel +12
We present the discovery of a new double detonation progenitor system consisting of a hot subdwarf B (sdB) binary with a white dwarf companion with an P=76.34179(2) min orbital per…
Heavy-metal enrichment of intermediate He-sdOB stars: the pulsators Feige 46 and LS IV -14 116 revisited
M. Dorsch, M. Latour, U. Heber +3
Hot subdwarf stars of types O and B represent a poorly understood phase in the evolution of low-mass stars. Many subdwarfs show rich oscillations and are among the most chemically…