Results 11 to 20 of about 8,250 (145)

Partial Tidal Disruptions of Main-sequence Stars by Intermediate-mass Black Holes

The Astrophysical Journal, 2023
We study close encounters of a 1 M _⊙ middle-age main-sequence star (modeled using MESA) with massive black holes through hydrodynamic simulations, and explore in particular the dependence of the outcomes on the black hole mass.
Fulya Kıroğlu, James C. Lombardi Jr., Kyle Kremer, Giacomo Fragione, Shane Fogarty, Frederic A. Rasio   +5 more
doaj   +1 more source

Entropy of the Universe and Hierarchical Dark Matter

Entropy, 2022
We discuss the relationship between dark matter and the entropy of the universe, with the premise that dark matter exists in the form of primordial black holes (PBHs) in a hierarchy of mass tiers. The lightest tier includes all PBHs with masses below one
Paul H. Frampton
doaj   +1 more source

Intermediate Mass Black Holes: Their Motion and Associated Energetics

Advances in High Energy Physics, 2014
There is a lot of current astrophysical evidence and interest in intermediate mass black holes (IMBH), ranging from a few hundred to several thousand solar masses.
C. Sivaram, Kenath Arun
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

Tidal disruption of white dwarfs by intermediate mass black holes

EPJ Web of Conferences, 2012
Modeling ultra-close encounters between a white dwarf and a spinning, intermediate mass black hole requires a full general relativistic treatment of gravity. This paper summarizes results from such a study.
Bode T., Shcherbakov R.V., Haas R., Laguna P.   +3 more
doaj   +1 more source

Interpretable Machine Learning for Finding Intermediate-mass Black Holes

The Astrophysical Journal
Definitive evidence that globular clusters (GCs) host intermediate-mass black holes (IMBHs) is elusive. Machine-learning (ML) models trained on GC simulations can in principle predict IMBH host candidates based on observable features.
Mario Pasquato, Piero Trevisan, Abbas Askar, Pablo Lemos, Gaia Carenini, Michela Mapelli, Yashar Hezaveh   +6 more
doaj   +1 more source

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

Constraining the Cosmic Merger History of Intermediate-mass Black Holes with Gravitational Wave Detectors

The Astrophysical Journal, 2023
Intermediate-mass black holes (IMBHs) have not been detected beyond any reasonable doubt through either dynamical or accretion signatures. Gravitational waves (GWs) represent an unparalleled opportunity to survey the sky and detect mergers of IMBHs ...
Giacomo Fragione, Abraham Loeb
doaj   +1 more source

Detecting Intermediate-mass Black Holes Using Quasar Microlensing

The Astrophysical Journal
Recent studies suggest that numerous intermediate-mass black holes (IMBHs) may wander undetected across the Universe, emitting little radiation. These IMBHs largely preserve their birth masses, offering critical insights into the formation of heavy black
Zihao Wu, Luis C. Ho
doaj   +1 more source

On the Tidal Capture of White Dwarfs by Intermediate-mass Black Holes in Dense Stellar Environments

The Astrophysical Journal, 2023
Intermediate-mass black holes (IMBHs) are the missing link between stellar-mass and supermassive black holes, widely believed to reside in at least some dense star clusters, but not yet observed directly.
Claire S. Ye, Giacomo Fragione, Rosalba Perna   +2 more
doaj   +1 more source