E-viri
Recenzirano
Odprti dostop
-
Mościbrodzka, M; Gammie, C. F; Dolence, J. C; Shiokawa, H
Astrophysical journal/The Astrophysical journal, 07/2011, Letnik: 735, Številka: 1Journal Article
Electron-positron pairs may be produced near accreting black holes by a variety of physical processes, and the resulting pair plasma may be accelerated and collimated into a relativistic jet. Here, we use a self-consistent dynamical and radiative model to investigate pair production by Delta *g Delta *g collisions in weakly radiative accretion flows around a black hole of mass M and accretion rate . Our flow model is drawn from general relativistic magnetohydrodynamic simulations, and our radiation field is computed by a Monte Carlo transport scheme assuming the electron distribution function is thermal. We argue that the pair production rate scales as . We confirm this numerically and calibrate the scaling relation. This relation is self-consistent in a wedge in parameter space. If is too low the implied pair density over the poles of the black hole is below the Goldreich-Julian density and Delta *g Delta *g pair production is relatively unimportant; if is too high the models are radiatively efficient. We also argue that for a power-law spectrum the pair production rate should scale with the observables LX = X-ray luminosity and M as L 2 X M --4. We confirm this numerically and argue that this relation likely holds even for radiatively efficient flows. The pair production rates are sensitive to black hole spin and to the ion-electron temperature ratio which are fixed in this exploratory calculation. We finish with a brief discussion of the implications for Sgr A* and M87.
Vnos na polico
Trajna povezava
- URL:
Faktor vpliva
Dostop do baze podatkov JCR je dovoljen samo uporabnikom iz Slovenije. Vaš trenutni IP-naslov ni na seznamu dovoljenih za dostop, zato je potrebna avtentikacija z ustreznim računom AAI.
Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Baze podatkov, v katerih je revija indeksirana
Ime baze podatkov | Področje | Leto |
---|
Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
---|
Vir: Osebne bibliografije
in: SICRIS
To gradivo vam je dostopno v celotnem besedilu. Če kljub temu želite naročiti gradivo, kliknite gumb Nadaljuj.