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Titolo:
Computation of outflow rates from accretion disks around black holes
Autore:
Das, S; Chattopadhyay, I; Nandi, A; Chakrabarti, SK;
Indirizzi:
SN Bose Natl Ctr Basic Sci, Salt Lake 700098, Kolkata, India SN Bose Natl Ctr Basic Sci Salt Lake Kolkata India 700098 Kolkata, India
Titolo Testata:
ASTRONOMY & ASTROPHYSICS
fascicolo: 2, volume: 379, anno: 2001,
pagine: 683 - 689
SICI:
1432-0746(200111)379:2<683:COORFA>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMPACT OBJECTS; MASS OUTFLOW; WINDS; MODEL;
Keywords:
X-rays : stars; stars : winds, outflows; black hole physics;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Chakrabarti, SK SN Bose Natl Ctr Basic Sci, Salt Lake 700098, Kolkata, India SN Bose Natl Ctr Basic Sci Salt Lake Kolkata India 700098
Citazione:
S. Das et al., "Computation of outflow rates from accretion disks around black holes", ASTRON ASTR, 379(2), 2001, pp. 683-689

Abstract

We self-consistently estimate the out ow rate from the accretion rates of an accretion disk around a black hole in which both the Keplerian and the sub-Keplerian matter flows simultaneously. While Keplerian matter supplies soft-photons, hot sub-Keplerian matter supplies thermal electrons. The temperature of the hot electrons is decided by the degree of inverse Comptonization of the soft photons. If we consider only thermally-driven flows from the centrifugal pressure-supported boundary layer around a black hole, we find that when the thermal electrons are cooled down, either because of the absence of the boundary layer (low compression ratio), or when the surface ofthe boundary layer is formed very far away, the out ow rate is negligible. For an intermediate size of this boundary layer the out ow rate is maximal. Since the temperature of the thermal electrons also decides the spectral state of a black hole, we predict that the out ow rate should be directly related to the spectral state.

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Documento generato il 09/04/20 alle ore 13:13:14