Accretion rates onto massive black holes in four quiescent elliptical galaxies

Authors
Wrobel, JM Herrnstein, JR
Citation
Jm. Wrobel et Jr. Herrnstein, Accretion rates onto massive black holes in four quiescent elliptical galaxies, ASTROPHYS J, 533(2), 2000, pp. L111-L114
Citations number
20
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004637X → ACNP
Volume
533
Issue
2
Year of publication
2000
Part
2
Pages
L111 - L114
Database
ISI
SICI code
0004-637X(20000420)533:2<L111:AROMBH>2.0.ZU;2-L
Abstract
Four quiescent elliptical galaxies were imaged with the NRAO VLA at 8.5 GHz . Within the context of canonical advection-dominated accretion flows (ADAF s), these VLA images plus published black hole masses constrain the accreti on rates to be less than 1.6 x 10(-4), less than 3.6 x 10(-4), less than or equal to 7.8 x 10(-4), and less than or equal to 7.4 x 10(-4) of the Eddin gton rates. These ADAF accretion rates derived at 8.5 GHz have important im plications for the levels of soft and hard X-rays expected from these quies cent galaxies.