Results 131 to 140 of about 8,827 (222)

The Use of Binary Black Holes Merging in Active Galactic Nuclei Disks for Hubble Constant Measurements

open access: yesThe Astrophysical Journal
We study the impact of environmental effects on the measurement of the Hubble constant ( H _0 ) from gravitational-wave (GW) observations of binary black hole mergers residing in active galactic nuclei (AGNs) near the central supermassive black hole ...
Guo-Peng Li, Xi-Long Fan
doaj   +1 more source

Supermassive Black Holes and Their Host Galaxies

open access: yesPublications of the Astronomical Society of the Pacific, 2008
n ...
openaire   +1 more source

Electromagnetic Signatures of Supermassive Black Hole Binaries [PDF]

open access: yes
Supermassive black hole binaries (SMBHBs) are, by all means, expected to exist; galaxies contain supermassive black holes, galaxies merge, and, so, there ought to be galaxies containing multiple supermassive black holes which, through a sequence of ...
Whitley, Kevin
core   +1 more source

Electromagnetic Signatures of Supermassive Binary Black Holes: Synchrotron, Self-lensing Flares, and Jet Precession

open access: yesThe Astrophysical Journal
The recent evidence for a nanohertz gravitational-wave background from pulsar timing arrays highlights the urgent need to identify electromagnetic counterparts to supermassive binary black holes.
Hong-Xuan Jiang   +5 more
doaj   +1 more source

The Role of Inhomogeneities in the Turbulent Accretion of Black Holes

open access: yesThe Astrophysical Journal
Observations of supermassive black holes by the Event Horizon Telescope reveal significant inhomogeneities, most likely related to density and magnetic field perturbations.
Giuseppe Ficarra   +3 more
doaj   +1 more source

Multi-Messenger Signatures from Supermassive Binary Black Hole Mergers [PDF]

open access: yes, 2010
Laguna, Pablo. (2010). Multi-Messenger Signatures from Supermassive Binary Black Hole Mergers.
Laguna, Pablo
core  

A Stellar Dynamical Mass Measurement of the Supermassive Black Hole in NGC 3258

open access: yesThe Astrophysical Journal
We present a stellar dynamical mass measurement of the supermassive black hole in the elliptical (E1) galaxy NGC 3258. Our findings are based on integral field unit spectroscopy from the Multi Unit Spectroscopic Explorer (MUSE) observations in narrow ...
Thomas K. Waters   +4 more
doaj   +1 more source

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

open access: yesThe 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   +4 more
doaj   +1 more source

The Supermassive Black Hole at the Galactic Center [PDF]

open access: yes, 2007
The inner few parsecs at the Galactic Center have come under intense scrutiny in recent years, in part due to the exciting broad-band observations of this region, but also because of the growing interest from theorists motivated to study the physics of ...
Heino Falcke, Fulvio Melia
core  

X-ray flares from the stellar tidal disruption by a candidate supermassive black hole binary. [PDF]

open access: yesNat Commun, 2020
Shu X   +10 more
europepmc   +1 more source

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