The Magnificent Seven: Close-by Cooling Neutron Stars?

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dc.creatorTreves, A.
dc.creatorPopov, S. B.
dc.creatorColpi, M.
dc.creatorProkhorov, M. E.
dc.creatorTurolla, R.
dc.date2000-11-30
dc.date2001-12-30
dc.date.accessioned2026-07-07T01:56:45Z
dc.date.available2026-07-07T01:56:45Z
dc.descriptionWe model Galactic populations of accreting and cooling isolated neutron stars in the attempt to explore their link with a new class of dim soft X-ray sources revealed by ROSAT. For accretors we follow the magneto-rotational and dynamical evolution in the Galactic potential and a realistic large scale distribution of the interstellar medium is used. Under standard assumptions old neutron stars enter the accretor stage only if their magnetic field exceeds $\approx 10^{11}$--$10^{12}$ G. We predict about 1 source per square degree for fluxes $\approx 10^{-15}$--$10^{-16}$ erg cm$^{-2}$s$^{-1}$ in the energy range 0.5-2 keV. Cooling neutron stars are explored within a simpler model of local sources, including however interstellar absorption. They are found to be significantly less abundant at low fluxes, $<0.1$ sources per square degree, but dominate over accretors at higher flux levels ($\approx 10^{-12}$--$10^{-11}$ erg cm$^{-2}$s$^{-1}$). We suggest that the faint sources observed by ROSAT may be young cooling neutron stars with typical age $\la 10^6$ yrs, if the total number of young neutron stars in the Solar proximity is $\sim 10$ times higher than inferred from radiopulsars statistics.
dc.description6 pages, 1 PostScript figure, To appear in Proc. of "X-ray astronomy 2000" (Palermo Sep. 2000), Eds. R. Giacconi, L. Stella, S. Serio; ASP Conf. Series, in press
dc.identifierhttps://arxiv.org/abs/astro-ph/0011564
dc.identifierhttp://arxiv.org/abs/astro-ph/0011564
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/2116
dc.subjectAstrophysics
dc.titleThe Magnificent Seven: Close-by Cooling Neutron Stars?
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