Now showing items 1-2 of 2

    • A determination of the space density and birth rate of hydrogen-line (DA) white dwarfs in the Galactic plane, based on the UVEX survey 

      Verbeek, Kars; Groot, Paul J.; Nelemans, Gijs A.; Scaringi, Simone; Napiwotzki, R.; Drew, J.E.; Steeghs, D.T.H.; Casares, Jorge; Corral-Santana, J.M.; Gänsicke, Boris T.; González-Solares, E.A.; Greimel, Robert; Heber, Ulrich; Irwin, Mike J.; Knigge, Christian; Wright, N.J.; Zijlstra, Albert (2013-10-01)
      We present a determination of the average space density and birth rate of hydrogen-line (DA) white dwarfs within a radius of 1 kpc around the Sun, based on an observational sample of 360 candidate white dwarfs with g <19.5 ...
    • Substellar companions and the formation of hot subdwarf stars 

      Geier, Stephan; Heber, Ulrich; Tillich, Alfred; Hirsch, Heiko; Kupfer, Thomas; Schaffenroth, Veronika; Classen, Lew; Maxted, Pierre F. L.; Ostensen, Roy H.; Barlow, Brad N.; Marsh, Tom R.; Gaensicke, Boris T.; Napiwotzki, Ralf; O'Toole, Simon J.; Guenther, Eike W. (American Institute of Physics (AIP), 2011)
      We give a brief review over the observational evidence for close substellar companions to hot subdwarf stars. The formation of these core helium-burning objects requires huge mass loss of their red giant progenitors. It ...