121 citations · 1.2k across the 53 of their papers we have counts for
9 papers · 1 filter
Quantitative spectral analysis of the sdB star HD 188112: a helium-core white dwarf progenitor
M. Latour, U. Heber, A. Irrgang +7
HD 188112 is a bright (V = 10.2 mag) hot subdwarf B (sdB) star with a mass too low to ignite core helium burning and is therefore considered as a pre-extremely low mass (ELM) white…
Hot subdwarfs in the Galactic halo - Tracers of prominent events in late stellar evolution
S. Geier, T. Kupfer, V. Schaffenroth +2
Hot subdwarf stars (sdO/Bs) are the stripped cores of red giants located at the bluest extension of the horizontal branch. They constitute the dominant population of UV-bright star…
A new HW Vir binary from the Palomar Transient Factory: PTF1 J072455.75+125300.3 - An eclipsing subdwarf B binary with a M-star companion
M. Schindewolf, D. Levitan, U. Heber +4
We report the discovery of an eclipsing binary -- PTF1 J072456125301-- composed of a subdwarf B (sdB) star () with a faint companion. Subdwarf B stars are core helium…
HD188112: Supernova Ia progenitor?
M. Latour, A. Irrgang, U. Heber +1
HD188112 is an extremely low mass white dwarf in a close binary system. According to a previous study, the mass of HD188112 is 0.24 Msun and a lower limit of 0.73 Msun could…
An eclipsing post common-envelope system consisting of a pulsating hot subdwarf B star and a brown dwarf companion
V. Schaffenroth, B. N. Barlow, H. Drechsel +1
Hot subdwarf B stars (sdBs) are evolved, core helium-burning objects located on the extreme horizontal branch. Their formation history is still puzzling as the sdB progenitors must…
The catalogue of radial velocity variable hot subluminous stars from the MUCHFUSS project
S. Geier, T. Kupfer, U. Heber +13
The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims to find sdBs with compact companions like massive white dwarfs, neutron stars or bl…
Observations of the extreme runaway HD271791: nucleosynthesis in a core-collapse supernova
V. Schaffenroth, N. Przybilla, K. Butler +2
Some young, massive stars can be found in the Galactic halo. As star formation is unlikely to occur in the halo, they must have been formed in the disk and been ejected shortly aft…
The population of white dwarf binaries with hot subdwarf companions
S. Geier, T. Kupfer, U. Heber +7
Hot subdwarfs (sdBs) are core helium-burning stars, which lost almost their entire hydrogen envelope in the red-giant phase. Since a high fraction of those stars are in close binar…
Hot subdwarf binaries from the MUCHFUSS project - Analysis of 12 new systems and a study of the short-period binary population
T. Kupfer, S. Geier, U. Heber +6
The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims at finding hot subdwarf stars with massive compact companions like massive white dw…