Results 51 to 60 of about 132,127 (279)

The observational signatures of supermassive black hole seeds [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2018
The origin and properties of the initial black hole seeds that grow to produce the observed population of accreting sources remain to be determined. It is a challenge to uniquely disentangle signatures of seeding from fueling and dynamics that shapes the
Angelo Ricarte, P. Natarajan
semanticscholar   +1 more source

Mass Functions of Supermassive Black Holes across Cosmic Time

open access: yesAdvances in Astronomy, 2012
The black hole mass function of supermassive black holes describes the evolution of the distribution of black hole mass. It is one of the primary empirical tools available for mapping the growth of supermassive black holes and for constraining ...
Brandon C. Kelly, Andrea Merloni
doaj   +1 more source

Detecting Supermassive Black Hole–induced Binary Eccentricity Oscillations with LISA [PDF]

open access: yesAstrophysical Journal, 2019
Stellar-mass black hole binaries (BHBs) near supermassive black holes (SMBH) in galactic nuclei undergo eccentricity oscillations due to gravitational perturbations from the SMBH.
Bao-Minh Hoang   +4 more
semanticscholar   +1 more source

The first supermassive black holes [PDF]

open access: yesAstronomy & Geophysics, 2017
We briefly review the historical development of the ideas regarding the first supermassive black hole seeds, the physics of their formation and radiative feedback, recent theoretical and observational progress, and our outlook for the future.
Abraham Loeb, Volker Bromm, Aaron Smith
openaire   +4 more sources

Partial Stellar Disruption by a Supermassive Black Hole: Is the Light Curve Really Proportional to t−9/4? [PDF]

open access: yesAstrophysical Journal, 2019
The tidal disruption of a star by a supermassive black hole, and the subsequent accretion of the disrupted debris by that black hole, offers a direct means to study the inner regions of otherwise-quiescent galaxies.
E. Coughlin, C. Nixon
semanticscholar   +1 more source

The spin of supermassive black holes [PDF]

open access: yesClassical and Quantum Gravity, 2013
Invited article accepted for publication in the focus issue on astrophysical black holes in Classical and Quantum Gravity, guest editors: D. Merritt and L. Rezzolla.
openaire   +3 more sources

Growth of Supermassive Black Holes, Galaxy Mergers and Supermassive Binary Black Holes [PDF]

open access: yesProceedings of the International Astronomical Union, 2015
AbstractThe study of galaxy mergers and supermassive binary black holes (SMBBHs) is central to our understanding of the galaxy and black hole assembly and (co-)evolution at the epoch of structure formation and throughout cosmic history. Galaxy mergers are the sites of major accretion episodes, they power quasars, grow supermassive black holes (SMBHs ...
J. G. Baker, F. K. Liu, S. Komossa
openaire   +3 more sources

Supermassive Black Holes [PDF]

open access: yesJournal of High Energy Physics, Gravitation and Cosmology, 2019
In the following black hole model, electrons and positrons form a neutral gas which is confined by gravitation. The smaller masses are supported against gravity by electron degeneracy pressure. Larger masses are supported by ideal gas and radiation pressure. In each case, the gas is a polytrope which satisfies the Lane-Emden equation.
openaire   +3 more sources

Impact of supermassive black hole growth on star formation [PDF]

open access: yesNature Astronomy, 2017
Supermassive black holes are found at the centres of massive galaxies. During the growth of these black holes they light up to become visible as active galactic nuclei (AGNs) and release extraordinary amounts of energy across the electromagnetic spectrum.
C. Harrison, C. Harrison
semanticscholar   +1 more source

Precessing jet nozzle connecting to a spinning black hole in M87 [PDF]

open access: yesNature, 2023
This study analyses radio observations of the jet in galaxy M87, from which the existence of a spinning black hole that induces Lense–Thirring precession of a misaligned accretion disk is inferred.
Yuzhu Cui   +78 more
semanticscholar   +1 more source

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