| Issue |
A&A
Volume 434, Number 2, May I 2005
|
|
|---|---|---|
| Page(s) | 649 - 655 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361:20042150 | |
| Published online | 11 April 2005 | |
Formation of massive skyrmion stars
1
Sternberg Astronomical Institute, Universitetski pr. 13, 119992 Moscow, Russia e-mail: [polar,mike]@sai.msu.ru
2
Università di Padova, Dipartimento di Fisica, via Marzolo 8, 35131 Padova, Italy e-mail: popov@pd.infn.it
Received:
10
October
2004
Accepted:
16
December
2004
We discuss different channels of formation of massive rapidly
rotating neutron stars.
We use a population synthesis code to estimate numbers of massive neutron stars
in different evolutionary stages.
For stiff equations of state the existence of neutron
stars with masses 
is possible.
An especially interesting situation occurs if
the equation of state based on the Skyrme theory is realized in nature.
A neutron star increases its mass by accretion from a secondary companion.
Significant growth of a
neutron star mass due to accretion is possible only for certain values of
initial parameters of the binary.
In this paper we show that a significant part of massive neutron stars with
can be observed as millisecond radio pulsars, as X-ray
sources in pairs with white dwarfs, and as accreting neutron stars with very
low magnetic fields.
Key words: stars: neutron / stars: evolution / stars: statistics / X-rays: binaries / binaries: close / pulsars: general
© ESO, 2005
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