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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 225899.0, MPI für Astronomie / Publikationen_mpia
Monte Carlo simulations of the halo white dwarf population
Authors:García-Berro, E.; Torres, S.; Isern, J.; Burkert, A.
Date of Publication (YYYY-MM-DD):2004
Title of Journal:Astronomy and Astrophysics
Volume:418
Start Page:53
End Page:65
Review Status:not specified
Audience:Not Specified
Abstract / Description:The interpretation of microlensing results
towards the Large Magellanic Cloud (LMC) still
remains controversial. While white dwarfs have
been proposed to explain these results and,
hence, to contribute significantly to the mass
budget of our Galaxy, there are also several
constraints on the role played by white dwarfs.
In this paper we analyze self-consistently and
simultaneously four different results, namely,
the local halo white dwarf luminosity function,
the microlensing results reported by the MACHO
team towards the LMC, the results of Hubble Deep
Field (HDF) and the results of the EROS
experiment, for several initial mass functions
and halo ages. We find that the proposed
log-normal initial mass functions do not
contribute to solve the problem posed by the
observed microlensing events and, moreover, they
overproduce white dwarfs when compared to the
results of the HDF and of the EROS survey. We
also find that the contribution of hydrogen-rich
white dwarfs to the dynamical mass of the halo
of the Galaxy cannot be more than ‚‚sim;4%.
Free Keywords:stars: white dwarfs; stars: luminosity
; function; mass function; Galaxy: stellar
; content; Galaxy: dark matter; Galaxy:
; structure; Galaxy: halo
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
External Affiliations:Escola Polit‚‚eacute;cnica Superior de
Castelldefels, Universitat Polit‚‚egrave;cnica de
Catalunya, Avda. del Canal Ol‚‚iacute;mpic s/n,
08860 Castelldefels, Spain; Institute for Space
Studies of Catalonia, c/Gran Capit‚‚agrave;2-4,
Edif. Nexus 104, 08034 Barcelona, Spain),
AB(Departament de F‚‚iacute;sica Aplicada, Escola
Polit‚‚eacute;cnica Superior de Castelldefels,
Universitat Polit‚‚egrave;cnica de Catalunya,
Avda. del Canal Ol‚‚iacute;mpic s/n, 08860
Castelldefels, Spain), AC(Institute for Space
Studies of Catalonia, c/Gran Capit‚‚agrave;2-4,
Edif. Nexus 104, 08034 Barcelona, Spain; Institut
de Ci‚‚egrave;ncies de l'Espai, CSIC),
AD(Max-Planck-Institut f‚‚uuml;r Astronomie,
Koenigstuhl 17, 69117 Heidelberg, Germany)
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi... [ID No:1]
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