1.4k citations · 42.7k across the 723 of their papers we have counts for
12 papers · 2 filters
Thermal equilibrium of an ideal gas in a free-floating box
Scott Tremaine, Bence Kocsis, Abraham Loeb
The equilibrium and fluctuations of an ideal gas in a rigid container are studied by every student of statistical mechanics. Here we study the less well-known case when the box is…
Measuring the mass and concentration of dark matter halos from the velocity dispersion profile of their stars
Sownak Bose, Abraham Loeb
We use the IllustrisTNG (TNG) cosmological, hydrodynamical simulations of galaxy formation to measure the velocity dispersion profiles of dark matter and star particles in Milky Wa…
On the Origin of GW190521-like events from repeated black hole mergers in star clusters
Giacomo Fragione, Abraham Loeb, Frederic A. Rasio
LIGO and Virgo have reported the detection of GW190521, from the merger of a binary black hole (BBH) with a total mass around M. While current stellar models limit th…
An upper limit on the spin of SgrA based on stellar orbits in its vicinity
Giacomo Fragione, Abraham Loeb
The spin of the massive black hole (BH) at the center of the Milky Way, SgrA, has been poorly constrained so far. We place an upper limit on the spin of SgrA based on the s…
DM halo morphological types of MW-like galaxies in the TNG50 simulation: Simple, Twisted, or Stretched
Razieh Emami, Shy Genel, Lars Hernquist +8
We present a comprehensive analysis of the shape of dark matter (DM) halos in a sample of 25 Milky Way-like galaxies in TNG50 simulation. Using an Enclosed Volume Iterative Method…
Calibrating the binary black hole population in nuclear star clusters through tidal disruption events
Giacomo Fragione, Rosalba Perna, Abraham Loeb
As the sensitivity of gravitational wave (GW) instruments improves and new networks start operating, hundreds of merging stellar-mass black holes (SBHs) and intermediate-mass black…
Destruction of molecular hydrogen ice and Implications for 1I/2017 U1 (`Oumuamua)
Thiem Hoang, Abraham Loeb
The first interstellar object observed in our solar system, 1I/2017 U1 (`Oumuamua), exhibited a number of peculiar properties, including extreme elongation and acceleration excess.…
Separating Accretion and Mergers in the Cosmic Growth of Black Holes with X-ray and Gravitational Wave Observations
Fabio Pacucci, Abraham Loeb
Black holes across a broad range of masses play a key role in the evolution of galaxies. The initial seeds of black holes formed at and grew over cosmic time by gas acc…
Contribution of Flares from Tidal Disruption of Stars to high-redshift AGN
Hamsa Padmanabhan, Abraham Loeb
We explore the contributions of Tidal Disruption Events (TDEs) to the flares in Active Galactic Nuclei (AGN) at high redshifts. Using the latest data available from X-ray and optic…
Merging Black Holes in the Low-mass and High-mass Gaps from 2+2 Quadruple Systems
Giacomo Fragione, Abraham Loeb, Frederic A. Rasio
The origin of the black hole (BH) binary mergers observed by LIGO-Virgo is still uncertain, as are the boundaries of the stellar BH mass function. Stellar evolution models predict…
Gravitational-wave captures by intermediate-mass black holes in galactic nuclei
Giacomo Fragione, Abraham Loeb, Kyle Kremer +1
Intermediate-mass black holes (IMBHs) have not been detected beyond any reasonable doubt, despite their potential role as massive seeds for quasars and sources of tidal disruption…
New empirical constraints on the cosmological evolution of gas and stars in galaxies
Hamsa Padmanabhan, Abraham Loeb
We combine the latest observationally motivated constraints on stellar properties in dark matter haloes, along with data-driven predictions for the atomic (HI) and molecular (H…