Results 81 to 90 of about 205,282 (201)

DAVOS: Dwarf Active Galactic Nuclei from Variability for the Origins of Seeds: Properties of Variability-selected Active Galactic Nuclei in the COSMOS Field and Expectations for the Rubin Observatory

The Astrophysical Journal
We study the black hole mass–host galaxy stellar mass relation, M _BH – M _* , of a sample of z < 4 optically variable active galactic nuclei (AGNs) in the COSMOS field. The parent sample of 491 COSMOS AGNs were identified by optical variability from the
Colin J. Burke, Yichen Liu, Charlotte A. Ward, Xin Liu, Priyamvada Natarajan, Jenny E. Greene   +5 more
doaj   +1 more source

The Intermediate-mass Black Hole Reverberation Mapping Project: First Detection of Mid-infrared Lags in Prototypical Intermediate-mass Black Holes in NGC 4395 and POX 52

The Astrophysical Journal Letters
The search for robust evidence of intermediate-mass black holes (IMBHs) is crucial for understanding the black hole seeding process and the formation of supermassive black holes in the early Universe.
Jingbo Sun, Hengxiao Guo, Wenwen Zuo, Paulina Lira, Minfeng Gu, Philip G. Edwards, Shu Wang, Jamie Stevens, Tao An, Samuzal Barua, Zhen-yi Cai, Haicheng Feng, Alok C. Gupta, Luis C. Ho, Dragana Ilić, Andjelka B. Kovačević, ShaSha Li, Mar Mezcua, Luka Č. Popović, Paula Sánchez-Sáez, Mouyuan Sun, Rongfeng Shen, Vivian U, Oliver Vince, Junxian Wang, Xuebing Wu, Zhefu Yu, Zhenya Zheng   +27 more
doaj   +1 more source

Desperately Seeking Intermediate-Mass Black Holes

, 2009
Observational searches for Intermediate Mass Black Holes (IMBHs), defined to have masses between 30 and 300,000 solar masses, provide limits which allow up to ten percent of what is presently identified as halo dark matter to be in the form of IMBHs.
openaire   +2 more sources

Supermassive Black Hole Growth in Hierarchically Merging Nuclear Star Clusters

The Astrophysical Journal
Supermassive black holes are prevalent at the centers of massive galaxies, and their masses scale with galaxy properties, increasing evidence suggesting that these trends continue to low stellar masses.
Konstantinos Kritos, Ricarda S. Beckmann, Joseph Silk, Emanuele Berti, Sophia Yi, Marta Volonteri, Yohan Dubois, Julien Devriendt   +7 more
doaj   +1 more source

Intermediate-mass black holes and contribution to extragalactic background light from Population III stars in Milky Way-like galaxies

Astronomy & Astrophysics
The mass range of observed black holes extends from stellar-mass to supermassive scales, yet the existence of objects in the intermediate-mass range of 102–105 M⊙ remains unconfirmed.
Mkrtchyan A., Horns D.
doaj   +1 more source

A stellar-mass black hole population in the globular cluster NGC 6101?

, 2016
Dalessandro et al. observed a similar distribution for blue straggler stars and main-sequence turn-off stars in the Galactic globular cluster NGC 6101, and interpreted this feature as an indication that this cluster is not mass-segregated. Using direct N-
Gieles, Mark, Gualandris, Alessia, Henault-Brunet, Vincent, Peuten, Miklos, Zocchi, Alice   +4 more
core   +1 more source

Observational evidence for intermediate-mass black holes [PDF]

International Journal of Modern Physics D, 2017
Intermediate-mass black holes (IMBHs), with masses in the range [Formula: see text]–[Formula: see text][Formula: see text]M[Formula: see text], are the link between stellar-mass BHs and supermassive BHs (SMBHs). They are thought to be the seeds from which SMBHs grow, which would explain the existence of quasars with BH masses of up to 10[Formula: see ...
openaire   +2 more sources

The Fate of EMRI-IMRI Pairs in Active Galactic Nucleus Accretion Disks: Hydrodynamical and Three-body Simulations

The Astrophysical Journal
Extreme-mass-ratio inspirals (EMRIs) and intermediate-mass-ratio inspirals (IMRIs) are important gravitational wave (GW) sources for the Laser Interferometer Space Antenna.
Peng Peng, Alessia Franchini, Matteo Bonetti, Alberto Sesana, Xian Chen   +4 more
doaj   +1 more source

Verifying the no-hair property of massive compact objects with intermediate-mass-ratio inspirals in advanced gravitational-wave detectors

, 2011
The detection of gravitational waves from the inspiral of a neutron star or stellar-mass black hole into an intermediate-mass black hole (IMBH) promises an entirely new look at strong-field gravitational physics.
Gair, Jonathan R., Mandel, Ilya, Rodriguez, Carl L.   +2 more
core   +1 more source

Entropy of Intermediate-Mass Black Holes

, 2009
Observational searches for Intermediate-Mass Black Holes (IMBHs), defined to have masses between 30 and 300,000 solar masses, provide limits which allow up to ten percent of what is presently identified as halo dark matter to be in the form of IMBHs.
openaire   +2 more sources