Pion production In The Inner Disk Around Cygnus X-1

Journal Article · Thu Dec 02 00:00:00 EST 2004 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1843633· OSTI ID:20630368

Meirelles Filho, C ^[1]; Miyake, H ^[2]; Timoteo, V S ^[3]; Lima, C L

---

1. Instituto de Astronomia, Geofisica e de Ciencias Atmosfericas, Universidade de Sao Paulo, 05508-090, Sao Paulo, SP (Brazil)
2. Instituto de Fisica, Universidade de Sao Paulo, 05315-970, Sao Paulo, SP (Brazil)
3. Centro Superior de Educacao Tecnologica, Universidade Estadual de Campinas, 13484-370, Limeira, SP (Brazil)

Neutron production via 4He breakup and p(p, n{pi}+)p is considered in the innermost region of an accretion disk surrounding a Kerr Black Hole. Close to the horizon, the contribution from p(p, n{pi}+)p to the neutron production is comparable to that from the breakup. It is shown that the viscosity generated by the collisions of the accreting matter with the neutrons may drive stationary accretion, for accretion rates below a critical value. In this case, solution to the disk equations is double-valued and for both solutions protons overnumber the pairs. We suggest that these solutions may mimic the states of high and low luminosity observed in Cygnus X-1.

• OSTI ID: 20630368
• Journal Information: AIP Conference Proceedings, Vol. 739, Issue 1; Conference: Joint meeting on QCD and QCP: 9. hadron physics and 7. relativistic aspects of nuclear physics, Rio de Janeiro (Brazil), 28 Mar - 3 Apr 2004; Other Information: DOI: 10.1063/1.1843633; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCRETION DISKS
BINARY STARS
BLACK HOLES
HELIUM 4
HELIUM 4 TARGET
MASS NUMBER
MATHEMATICAL SOLUTIONS
NEUTRONS
PARTICLE PRODUCTION
PROTON REACTIONS
PROTON-NUCLEON INTERACTIONS
PROTONS
X RADIATION