320 citations · 2.6k across the 62 of their papers we have counts for
14 papers · 1 filter
Astrometry with the Keck-Interferometer: the ASTRA project and its science
Jorg-Uwe Pott, Julien Woillez, Rachel L. Akeson +22
The sensitivity and astrometry upgrade ASTRA of the Keck Interferometer is introduced. After a brief overview of the underlying interferometric principles, the technology and conce…
Magnetar Driven Bubbles and the Origin of Collimated Outflows from GRBs
N. Bucciantini, E. Quataert, J. Arons +2
We model the interaction between the wind from a newly formed rapidly rotating magnetar and the surrounding progenitor. In the first few seconds after core collapse the magnetar in…
Magnetar Driven Bubbles and the Origin of Collimated Outflows in Gamma-ray Bursts
N. Bucciantini, E. Quataert, J. Arons +2
We model the interaction between the wind from a newly formed rapidly rotating magnetar and the surrounding supernova shock and host star. The dynamics is modeled using the two-dim…
From Thin to Thick: The Impact of X-ray Irradiation on Accretion Disks in AGN
P. Chang, E. Quataert, N. Murray
We argue that the X-ray and UV flux illuminating the parsec-scale accretion disk around luminous active galactic nuclei (AGN) is super-Eddington with respect to the local far-infra…
Thermal X-Ray Iron Line Emission from the Galactic Center Black Hole Sagittarius A*
Ya-Di Xu, Ramesh Narayan, Eliot Quataert +2
We model thermal X-ray emission from the accreting supermassive black hole Sagittarius A* at the Galactic Center. For the region inside of the center, we use a…
The effect of gravitational-wave recoil on the demography of massive black holes
Piero Madau, Eliot Quataert
The coalescence of massive black hole (MBH) binaries following galaxy mergers is one of the main sources of low-frequency gravitational radiation. A higher-order relativistic pheno…
On the Radial Structure of Radiatively Inefficient Accretion Flows with Convection
Marek A. Abramowicz, Igor V. Igumenshchev, Eliot Quataert +1
We consider the radial structure of radiatively inefficient hydrodynamic accretion flows around black holes. We show that low-viscosity flows consist of two zones: an outer convect…
Chandra Limits on X-ray Emission Associated with the Supermassive Black Holes in Three Giant Elliptical Galaxies
M. Loewenstein, R. F. Mushotzky, L. Angelini +2
Elliptical galaxy nuclei are the sites of the largest black holes known, but typically show little or no nuclear activity. We investigate this extreme quiescence using Chandra X-ra…
Ionization, Magneto-rotational, and Gravitational Instabilities in Thin Accretion Disks Around Supermassive Black Holes
Kristen Menou, Eliot Quataert
We consider the combined role of the thermal ionization, magneto-rotational and gravitational instabilities in thin accretion disks around supermassive black holes. We find that in…
Spectral Models of Convection-Dominated Accretion Flows
Gregory Ball, Ramesh Narayan, Eliot Quataert
For small values of the dimensionless viscosity parameter, namely , the dynamics of non-radiating accretion flows is dominated by convection; convection strongly sup…
Possible Evidence for Truncated Thin Disks in the Low-Luminosity Active Galactic Nuclei M81 and NGC 4579
Eliot Quataert, Tiziana Di Matteo, Ramesh Narayan +1
M81 and NGC 4579 are two of the few low-luminosity active galactic nuclei which have an estimated mass for the central black hole, detected hard X-ray emission, and detected optica…
Low radiative efficiency accretion in the nuclei of elliptical galaxies
T. Di Matteo, E. Quataert, S. W. Allen +2
The discovery of hard, power-law X-ray emission from a sample of six nearby elliptical galaxies, including the dominant galaxies of the Virgo,Fornax and Centaurus clusters (M87, NG…
Advection-Dominated Accretion around Black Holes
Ramesh Narayan, Rohan Mahadevan, Eliot Quataert
This article reviews the physics of advection-dominated accretion flows (ADAFs) and describes applications to several black hole X-ray binaries and galactic nuclei. The possibility…
Astrophysical Evidence for Black Hole Event Horizons
K. Menou, E. Quataert, R. Narayan
Astronomers have discovered many potential black holes in X-ray binaries and galactic nuclei. These black holes are usually identified by the fact that they are too massive to be n…