Issue |
A&A
Volume 406, Number 1, July IV 2003
|
|
---|---|---|
Page(s) | 111 - 117 | |
Section | Galactic structure, stellar clusters, and populations | |
DOI | https://doi.org/10.1051/0004-6361:20030680 | |
Published online | 17 November 2003 |
Young isolated neutron stars from the Gould Belt
1
Sternberg Astronomical Institute, Universitetski pr. 13, 119992 Moscow, Russia e-mail: mike@sai.msu.ru
2
Università di Padova, Dipartimento di Fisica, via Marzolo 8, 35131, Padova, Italy e-mail: turolla@pd.infn.it; popov@pd.infn.it
3
Università di Milano-Bicocca, Dipartimento di Fisica, Piazza della Scienza 3, 20126, Milano, Italy e-mail: Monica.Colpi@mib.infn.it
4
Università dell'Insubria, Dipartimento di Scienze, via Vallegio 11, 22100, Como, Italy e-mail: treves@mib.infn.it
Corresponding author: S. B. Popov, polar@sai.msu.ru
Received:
27
November
2002
Accepted:
2
April
2003
The origin of the local population of young,
cooling neutron stars is
investigated with a population synthesis model
taking into account the contribution of neutron stars born in the
Gould Belt, in addition to those originating in the Galactic
disk. We estimate their emission in the soft X-ray band as a
function of distance and age and construct the Log N–Log S
distribution. It is shown that the inclusion
of neutron stars from the Gould Belt provides a good fit to the
observed Log N–Log S distribution. As the Sun is situated
inside the Gould Belt, one can naturally explain the comparative
local overabundance of massive progenitors and can remove the
difficulty of the deficit of relatively bright (0.1 ROSAT
PSPC cts s-1) cooling neutron stars previously reported from
models where only
neutron stars from the Galactic disk were accounted for.
Key words: stars: neutron / stars: evolution / stars: statistics / X-rays: stars
© ESO, 2003
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