Results 21 to 30 of about 8,250 (145)

Properties of “Lite” Intermediate-mass Black Hole Candidates in LIGO-Virgo’s Third Observing Run

The Astrophysical Journal Letters
Over a hundred gravitational-wave (GW) detections and candidates have been reported from the first three observing runs of the Advanced LIGO-Virgo-KAGRA (LVK) detectors. Among these, the most intriguing events are binary black hole mergers that result in
Krystal Ruiz-Rocha, Anjali B. Yelikar, Jacob Lange, William Gabella, Robert A. Weller, Richard O’Shaughnessy, Kelly Holley-Bockelmann, Karan Jani   +7 more
doaj   +1 more source

Prospects for Revealing Intermediate-mass Black Holes in NGC 1399 Using SKA

The Astrophysical Journal
This study investigates the detectability of intermediate-mass black holes (IMBHs) within the mass range 10 ^2 M _⊙ ≤ M _BH ≤ 10 ^5 M _⊙ in the globular star clusters of NGC 1399 at a frequency of 300.00 MHz.
B. Karimi, P. Barmby, S. Abbassi
doaj   +1 more source

Novel Approach to the Dark Matter Problem: Primordial Intermediate-Mass Black Holes [PDF]

, 2022
Paul H. Frampton
openalex   +1 more source

Probing Supermassive Black Hole Seed Scenarios with Gravitational-wave Measurements

The Astrophysical Journal
The process whereby the supermassive black holes (SMBHs) populating the centers of galaxies have been assembled remains to be established, with the relative importance of seeds provided by collapsed Population III stars, black holes formed in nuclear ...
John Ellis, Malcolm Fairbairn, Juan Urrutia, Ville Vaskonen   +3 more
doaj   +1 more source

Gravitational Wave (GW) Classification, Space GW Detection Sensitivities and AMIGO (Astrodynamical Middle-frequency Interferometric GW Observatory)

EPJ Web of Conferences, 2018
After first reviewing the gravitational wave (GW) spectral classification. we discuss the sensitivities of GW detection in space aimed at low frequency band (100 nHz–100 mHz) and middle frequency band (100 mHz–10 Hz).
Ni Wei-Tou
doaj   +1 more source

Angular momentum of dark matter black holes

Physics Letters B, 2017
We provide strongly suggestive evidence that the halo constituents of dark matter are Primordial Intermediate-Mass Black Holes (PIMBHs). PIMBHs are described by a Kerr metric with two parameters, mass M and angular momentum J.
Paul H. Frampton
doaj   +1 more source

Overmassive Black Holes in Dwarf Galaxies Out to z ∼ 0.9 in the VIPERS Survey

The Astrophysical Journal Letters, 2023
Supermassive black holes (SMBHs) are thought to originate from early universe seed black holes of mass M _BH ∼ 10 ^2 –10 ^5 M _⊙ and grown through cosmic time. Such seeds could be powering the active galactic nuclei (AGN) found in today’s dwarf galaxies.
Mar Mezcua, Malgorzata Siudek, Hyewon Suh, Rosa Valiante, Daniele Spinoso, Silvia Bonoli   +5 more
doaj   +1 more source

Constraining the Low-mass End of the Black Hole Mass Function and the Active Fraction of the Intermediate-mass Black Holes

The Astrophysical Journal
We investigate the black hole mass function (BHMF) and the Eddington ratio distribution function (ERDF), focusing on the intermediate-mass black holes (IMBHs) with masses down to M _• ∼ 10 ^4 M _⊙ .
Hojin Cho, Jong-Hak Woo
doaj   +1 more source

Using [Ne v]/[Ne iii] to Understand the Nature of Extreme-ionization Galaxies

The Astrophysical Journal, 2023
Spectroscopic studies of extreme-ionization galaxies (EIGs) are critical to our understanding of exotic systems throughout cosmic time. These EIGs exhibit spectral features requiring >54.42 eV photons: the energy needed to ionize helium into He ^2+ fully
Nikko J. Cleri, Grace M. Olivier, Taylor A. Hutchison, Casey Papovich, Jonathan R. Trump, Ricardo O. Amorín, Bren E. Backhaus, Danielle A. Berg, Vital Fernández, Steven L. Finkelstein, Seiji Fujimoto, Michaela Hirschmann, Jeyhan S. Kartaltepe, Dale D. Kocevski, Raymond C. Simons, Stephen M. Wilkins, L. Y. Aaron Yung   +16 more
doaj   +1 more source

Gravitational wave of intermediate-mass black holes in Population III star clusters [PDF]

, 2022
Long Wang, Ataru Tanikawa, Michiko S. Fujii   +2 more
openalex   +1 more source