Results 91 to 100 of about 2,217,119 (170)

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

The 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

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

The 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, Xinyu Li, Jing-Ze Xia, Yosuke Mizuno, Ziri Younsi, Christian M. Fromm   +5 more
doaj   +1 more source

The Role of Inhomogeneities in the Turbulent Accretion of Black Holes

The 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, Michele Arcuri, Rita Megale, Sergio Servidio   +3 more
doaj   +1 more source

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

The 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, Kayhan Gültekin, Karl Gebhardt, Neil Nagar, Vanessa Ávila   +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

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

Nat Commun, 2020
Shu X, Zhang W, Li S, Jiang N, Dou L, Yan Z, Xie FG, Shen R, Sun L, Liu F, Wang T.   +10 more
europepmc   +1 more source

Explorations of four and five dimensional black hole spacetimes [PDF]

, 2009
This thesis concentrates on four and five dimensional black holes and their associated geodesies. Some coordinate charts are presented, which are useful in the analysis of both static and rotating black holes, and their mathematical properties ...
Hoskisson, James
core  

Primordial Origins of Supermassive Black Holes [PDF]

, 2019
At the center of the Milky Way sits a supermassive black hole named Sagittarius A*1, which is over a million times the mass of our sun. Other galaxy centers host similar black holes which are up to thousands of times larger than even Sagittarius A*. Some
Black, William, Neilson, David
core  

Charged and magnetized particle motion around a static black hole in the Starobinsky–Bel–Robinson gravity

European Physical Journal C: Particles and Fields
In this work we focus on the effects of Starobinsky–Bel–Robinson (SBR) gravity parameter and external magnetic field on the motion of charged test particles and magnetic dipoles moving around a black hole in the selected gravity theory.
Akbar Davlataliev, Bakhtiyor Narzilloev, Ibrar Hussain, Ahmadjon Abdujabbarov, Bobomurat Ahmedov   +4 more
doaj   +1 more source

Follow the Mass—A Concordance Picture of Tidal Disruption Events

The Astrophysical Journal
Three recent global simulations of tidal disruption events (TDEs) have produced, using different numerical techniques and parameters, very similar pictures of their dynamics.
Julian Krolik, Tsvi Piran, Taeho Ryu
doaj   +1 more source