All-Moscow Seminar of Astrophysicists
(ASA)
The seminar is supported by the grant of Federal Programm "Integration"
annotation of talk
Popov S.B. (SAI), Prokhorov M.E. (SAI), Colpi M. (Univ. of Milan),
Treves A. (Univ. of Como), Turolla R. (Univ. of Padova)
Isolated neutron stars: evolution and LogN/LogS
We model populations of isolated neutron stars in the Galaxy
following their orbital and magneto-rotational evolution.
It is shown that accretors become more abundant than coolers
at fluxes below approximately 10-13 erg cm-2
s-1,
and one can predict that about one accreting neutron star per square
degree should be observed at the Chandra and Newton flux limits of
approx. 10-16 erg cm-2 s-1.
The weak ROSAT sources, tentatively associated with isolated neutron stars,
can be relatively young, cooling objects, if the neutron star birth rate
in the solar vicinity during the last approx. 106 yr
was higher than
inferred from radiopulsar observations.