Now showing items 1-10 of 10

    • Axions and the cooling of white dwarf stars 

      Isern, J.; Garcia-Berro, E.; Torres, S.; Catalan, Silvia (2008-08-01)
      White dwarfs are the end product of the lives of intermediate- and low-mass stars and their evolution is described as a simple cooling process. Recently, it has been possible to determine with an unprecedented precision ...
    • Axions and the white dwarf luminosity function 

      Isern, J.; Catalan, Silvia; Garcia-Berro, E.; Torres, S. (2009)
      The evolution of white dwarfs can be described as a simple cooling process. Recently, it has been possible to determine with an unprecedented precision their luminosity function, that is, the number of stars per unit volume ...
    • The impact of mergers in the white dwarf mass distribution 

      Catalan, Silvia; Isern, J.; Garcia-Berro, E.; Hernanz, M. (American Institute of Physics, 2010)
      The study of the white dwarf mass distribution gives a unique opportunity to obtain information about the amount of mass lost during stellar evolution. Spectroscopic observations of a large number of white dwarfs has allowed ...
    • The initial-final mass relationship from white dwarfs in common proper motion pairs 

      Catalan, Silvia; Isern, J.; Garcia-Berros, E.; Ribas, I.; Prieto, C. Allende; Bonanoss, A. Z. (2008-01)
      Context. The initial-final mass relationship of white dwarfs, which is poorly constrained, is of paramount importance for different aspects of modern astrophysics. From an observational perspective, most of the studies up ...
    • The initial-final mass relationship of white dwarfs in common proper motion pairs 

      Catalan, Silvia; Ribas, I.; Isern, J.; Garcia-Berro, E.; Prieto, C. Allende (Astronomical Society of the Pacific, 2007)
      A promising approach to decrease the uncertainties in the initial-final mass relationship, which is still poorly constrained, is to study white dwarfs for which external constraints are available, for instance, white dwarfs ...
    • The initial-final mass relationship of white dwarfs revisited: effect on the luminosity function and mass distribution 

      Catalan, Silvia; Isern, J.; Garcia-Berro, E.; Ribas, I. (2008-07-11)
      The initial-final mass relationship connects the mass of a white dwarf with the mass of its progenitor in the main sequence. Although this function is of fundamental importance to several fields in modern astrophysics, it ...
    • Stellar chronology with white dwarfs in wide binaries 

      Catalan, Silvia; Garces, A.; Ribas, I.; Isern, J.; Garcia-Berro, E. (Cambridge University Press, 2009)
      White dwarfs are the evolutionary end product of stars with low and intermediate masses. The evolution of white dwarfs can be understood as a cooling process, which is relatively well known at the moment;. For this reason, ...
    • Testing the initial-final mass relationship of white dwarfs 

      Catalan, Silvia; Isern, J.; Garcia-Berro, E.; Ribas, I. (2009)
      In this contribution we revisit the initial-final mass relationship of white dwarfs, which links the mass of a white dwarf with that of its progenitor in the main-sequence. Although this function is of paramount importance ...
    • Testing the relationship between the masses of white dwarfs and those of their progenitors 

      Isern, J.; Catalan, Silvia; Garcia-Berro, E.; Hernanz, M. (Astronomical Society of the Pacific, 2007)
      The initial final mass relationship of white dwarfs is the function that relates the mass of the white dwarfs with the mass of their main sequence progenitors. At present this function is relatively poorly known from both ...
    • WD0433+270: an old Hyades stream member or an Fe-core white dwarf? 

      Catalan, Silvia; Ribas, I.; Isern, J.; Garcia-Berro, E. (2008-01)
      Context. G39-27/289 is a common proper-motion pair formed by a white dwarf (WD0433+270) and a main-sequence star (BD+26 730) that apparently has been classified as a member of the Hyades open cluster. Previous studies of ...