Old Isolated Accreting Neutron Stars: The Diffuse X-ray Emission From The Galactic Center
Silvia Zane (1), Roberto Turolla (2), Aldo Treves (3)
(1) International School for Advanced Studies, Via Beirut 2-4, 34014 Trieste, Italy, e-mail: zane@sissa.it
(2) Dept. of Physics, University of Padova,, Via Marzolo 8, 35131 Padova, Italy, e-mail: turolla@astvs1.pd.infn.it
(3) International School for Advanced Studies,, Via Beirut 2-4, 34014 Trieste, Italy, e-mail: treves@astmiu.uni.mi.astro.it
Paper: to be published in ApJ
Abstract:
The contribution of weakly-magnetized (B ~ 10^9 G) neutron stars
accreting the interstellar
medium to the diffuse X-ray emission observed in the Galactic Center
is investigated. It is shown that, under rather conservative assumptions about
the neutron stars and gas distributions, the accretion luminosity can
account for a sizable fraction, possibly most, of the detected X-ray flux
in the 2.5-7 keV band. In particular, model results are compared with
Granat data and show a general agreement in both the flux energy
and radial distributions.
Preprints available from the authors at turolla@astaxp.pd.infn.it
,
or the raw TeX file (no figures) if you click here.
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