1998
DOI: 10.1086/311220
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Emission from Isolated Black Holes and MACHO[CLC]s[/CLC] Accreting from the Interstellar Medium

Abstract: Adopting the advection dominated accretion flow (ADAF) model, we have re-examined the radiation emitted by isolated stellar-mass black holes accreting from the interstellar medium of our Galaxy. Two distinct types of black holes are given consideration, 1) remnants of conventional massive star evolution (RBHs, mass ∼ 10M ⊙ ), and 2) low-mass objects which possibly constitutes the dark halo and cause the observed microlensing events (MACHOBHs, mass ∼ 0.5M ⊙ ). In contrast to previous studies incorporating spher… Show more

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Cited by 40 publications
(50 citation statements)
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“…As in the case of dim galactic nuclei, we suggest that the discrepancy is because the accretion onto the neutron stars occurs via a convection-dominated Ñow, so that the mass accretion rate is far below the Bondi rate. There are similar implications also for accreting stellarmass black holes (e.g., Fujita et al 1998). …”
Section: Astrophysical Applicationsmentioning
confidence: 64%
“…As in the case of dim galactic nuclei, we suggest that the discrepancy is because the accretion onto the neutron stars occurs via a convection-dominated Ñow, so that the mass accretion rate is far below the Bondi rate. There are similar implications also for accreting stellarmass black holes (e.g., Fujita et al 1998). …”
Section: Astrophysical Applicationsmentioning
confidence: 64%
“…Some are purely theoretical (Punsly 1998a(Punsly , 1998bGruzinov & Quataert 1999;Abramowicz et al 2002) and other provide discussions of their observational detection (Heckler & Colb 1996;Fujita et al 1998;Beskin et al 2000;Agol & Kamionkowski 2002;Chisholm et al 2003). The importance of experiments in strong gravitational fields has been recently noted by Damour (1998).…”
Section: Discussionmentioning
confidence: 98%
“…In the recent series of papers on the analysis of accretion onto single black holes, it was reasoned that a disc-like regime is realized for such a case also (Fujita et al 1998;Agol & Kamionowski 2002;Chisholm et al 2003). However, it seems they used overestimated values for the captured angular momentum.…”
Section: Nature Of Accretion and Basic Parametersmentioning
confidence: 99%
“…The detectability of isolated BHs accreting interstellar gas has been studied in a number of publications (Fujita et al 1998;Agol & Kamionkowski 2002 and references therein), and we follow these for the basic formulations. As a typical galaxy, we choose the parameters of our Galaxy with a total halo mass of M halo ¼ 10 12 M and circular velocity of V c ¼ 220 km s À1 .…”
Section: Number Of Ulxs: An Order-of-magnitude Analysismentioning
confidence: 99%