Results 121 to 130 of about 32,361 (211)

New Estimates of the Spin and Accretion Rate of the Black Hole M87*

The Astrophysical Journal Letters
In this Letter, we use the imaging results of M87* from the Event Horizon Telescope (EHT) to calculate the rotational velocity of the inner edge of the accretion disk and find a value of ∼0.14 c .
Michael Drew, Joshua S. Stanway, Brett A. Patterson, Timothy J. Walton, Derek Ward-Thompson   +4 more
doaj   +1 more source

Connecting Cores and Black Hole Dynamics across Scales: From Globular Clusters to Massive Ellipticals

The Astrophysical Journal Letters
The centers of massive elliptical galaxies exhibit a wide range in density profiles, from central cusps to resolved cores with order kiloparsec sizes.
Kyle Kremer, Newlin C. Weatherford, Philip F. Hopkins, Nicholas Z. Rui, Claire S. Ye   +4 more
doaj   +1 more source

Disks around merging binary black holes: From GW150914 to supermassive black holes. [PDF]

Phys Rev D, 2018
Khan A, Paschalidis V, Ruiz M, Shapiro SL.   +3 more
europepmc   +1 more source

How a Klein–Nishina Modified Eddington-limited Accretion Explains Rapid Black Hole Growth in the Early Universe

The Astrophysical Journal
The discovery of quasars and their supermassive black holes (SMBHs) over 10 ^9 ${M}_{{\rm{\odot }}}$ merely hundreds of millions of years after the Big Bang generates tension with the idea of Eddington-limited accretion and pressures the community into ...
Jackson Frangos, Erick Rosen, Michael Williams, Chandra B. Singh, David Garofalo   +4 more
doaj   +1 more source

How to Swallow a Sun. [PDF]

Sci Am, 2017
Cenko SB, Gehrels N.
europepmc   +1 more source

Supermassive black holes : the local supermassive black hole mass function

, 2012
Over recent years there has been an increase of the number of secure supermassive black hole (SMBH) detections. These SMBH measurements have lead astronomers to establish well defined empirical relationships between the SMBH mass and some of the properties of the host galaxy.
openaire   +1 more source

Accretion Onto Supermassive Black Hole Binaries

In this chapter, we give an overview of our current understanding of the physics of accreting massive black hole binaries (MBHBs), with a special focus on the latest developments in numerical simulations and General-Relativistic Magnetohydrodynamics (GRMHD) simulations in particular.
Gutiérrez, Eduardo M., Combi, Luciano, Ryan, Geoffrey   +2 more
openaire   +2 more sources

Stellar Black Holes Can “Stretch” Supermassive Black Hole Accretion Disks

The Astrophysical Journal Letters
Abstract Stellar black holes (sBHs) are widely believed to exist in the accretion disks of active galactic nuclei (AGNs). Previous studies often focus on the transient emission produced by embedded sBHs. Here, we explore the possible observational consequences of an AGN accretion disk that contains a population of accreting sBHs ...
Shuying Zhou, Mouyuan Sun, Tong Liu, Jian-Min Wang, Jun-Xian Wang, Yongquan Xue   +5 more
openaire   +3 more sources

Probing black holes in a dark matter spike of M87 using quasinormal modes

European Physical Journal C: Particles and Fields
Dark matter density can be significantly enhanced by the supermassive black hole at the galactic center, leading to a structure called dark matter spike. Dark matter spike may change the spacetime properties of black holes that constitute deviations from
Dong Liu, Yi Yang, Zheng-Wen Long
doaj   +1 more source

Cosmological evolution of supermassive black holes in galactic centers unveiled by hard X-ray observations. [PDF]

Proc Jpn Acad Ser B Phys Biol Sci, 2015
Ueda Y.
europepmc   +1 more source