Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..586..687b&link_type=abstract
RELATIVISTIC ASTROPHYSICS: 20th Texas Symposium. AIP Conference Proceedings, Volume 586, pp. 687-689 (2001).
Astronomy and Astrophysics
Astrophysics
Galactic Halos, Infall, Accretion, And Accretion Disks, Black Holes, Radiative Capture, Galactic Nuclei, Circumnuclear Matter, And Bulges
Scientific paper
Hot plasma of ion temperature exceeding several MeV can exist in the inner accretion disks around black holes. This inevitably leads to the neutron production via dissociation of helium nuclei. We show that, for a broad range of accretion parameters, neutrons effectively decouple from protons and pile up in the inner disk leading to the formation of self-sustained halo. This means that new neutrons in the halo are supplied mainly by the splitting of helium nuclei in their collisions with existing neutrons. Once formed, such a halo can exist even if the proton temperature is much lower than the energy of helium dissociation. .
Belyanin Alexey
Derishev Evgeny V.
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