The Galactic Center massive black hole and nuclear star cluster

R Genzel, F Eisenhauer, S Gillessen - Reviews of modern physics, 2010 - APS
The Galactic Center is an excellent laboratory for studying phenomena and physical
processes that may be occurring in many other galactic nuclei. The center of our Milky Way …

Particle dark matter: Evidence, candidates and constraints

G Bertone, D Hooper, J Silk - Physics reports, 2005 - Elsevier
In this review article, we discuss the current status of particle dark matter, including
experimental evidence and theoretical motivations. We discuss a wide array of candidates …

Hot accretion flows around black holes

F Yuan, R Narayan - Annual Review of Astronomy and …, 2014 - annualreviews.org
Black hole accretion flows can be divided into two broad classes: cold and hot. Whereas
cold accretion flows consist of cool optically thick gas and are found at relatively high mass …

Viewing the shadow of the black hole at the galactic center

H Falcke, F Melia, E Agol - The Astrophysical Journal, 1999 - iopscience.iop.org
In recent years, evidence for the existence of an ultracompact concentration of dark mass
associated with the radio source Sagittarius A* in the Galactic center has become very …

Chandra X-ray spectroscopic imaging of Sagittarius A* and the central parsec of the galaxy

FK Baganoff, Y Maeda, M Morris… - The Astrophysical …, 2003 - iopscience.iop.org
We report the results of the first-epoch observation with the ACIS-I instrument on the
Chandra X-Ray Observatory of Sagittarius A*(Sgr A*), the compact radio source associated …

Nonthermal electrons in radiatively inefficient accretion flow models of Sagittarius A

F Yuan, E Quataert, R Narayan - The Astrophysical Journal, 2003 - iopscience.iop.org
We investigate radiatively inefficient accretion flow models for Sgr A*, the supermassive
black hole in our Galactic center, in light of new observational constraints. Confirmation of …

Can the EHT M87 results be used to test general relativity?

SE Gralla - Physical Review D, 2021 - APS
No. All theoretical predictions for the observational appearance of an accreting
supermassive black hole, as measured interferometrically by a sparse Earth-sized array at …

The stellar cusp around the supermassive black hole in the galactic center

R Genzel, R Schödel, T Ott, F Eisenhauer… - The Astrophysical …, 2003 - iopscience.iop.org
We analyze deep near-IR adaptive optics imaging (taken with NAOS/CONICA on the Very
Large Telescope at the European Southern Observatory, Chile), as well as new proper …

Explaining the spectrum of Sagittarius A* with a model of an accreting black hole

R Narayan, I Yi, R Mahadevan - Nature, 1995 - nature.com
THE radio source at the centre of our Galaxy1, Sagittarius A*(Sgr A*), seems to be a low-
luminosity version of active galactic nuclei—a massive black hole that is accreting gas from …

Advection-dominated accretion model of Sagittarius A*: evidence for a black hole at the Galactic center

R Narayan, R Mahadevan, JE Grindlay… - The Astrophysical …, 1998 - iopscience.iop.org
Sagittarius A*, which is located at the Galactic center, is a puzzling source. It has a mass of
M=(2.5±0.4)× 10 6 M &sun;, which makes it an excellent black hole candidate. Observations …