Testing general relativity with the Event Horizon Telescope
D Psaltis - General Relativity and Gravitation, 2019 - Springer
Abstract The Event Horizon Telescope is a millimeter VLBI array that is taking the first
horizon-scale pictures of the black hole in the center of the M87 galaxy and, in the near …
horizon-scale pictures of the black hole in the center of the M87 galaxy and, in the near …
Millimeter light curves of Sagittarius A* observed during the 2017 Event Horizon Telescope campaign
M Wielgus, N Marchili, I Martí-Vidal… - The Astrophysical …, 2022 - iopscience.iop.org
Several years after its initial identification (Balick & Brown 1974), the radio source at the
center of our Galaxy, now associated with the supermassive black hole Sagittarius A*(Sgr …
center of our Galaxy, now associated with the supermassive black hole Sagittarius A*(Sgr …
Modeling the orbital motion of Sgr A*'s near-infrared flares
Infrared observations of Sgr A* probe the region close to the event horizon of the black hole
at the Galactic center. These observations can constrain the properties of low-luminosity …
at the Galactic center. These observations can constrain the properties of low-luminosity …
A Chandra/HETGS census of X-ray variability from Sgr A* during 2012
We present the first systematic analysis of the X-ray variability of Sgr A* during the Chandra
X-ray Observatory's 2012 Sgr A* X-ray Visionary Project. With 38 High Energy Transmission …
X-ray Observatory's 2012 Sgr A* X-ray Visionary Project. With 38 High Energy Transmission …
Constraining particle acceleration in Sgr A⋆ with simultaneous GRAVITY, Spitzer, NuSTAR, and Chandra observations
R Abuter, A Amorim, M Bauböck, F Baganoff… - Astronomy & …, 2021 - aanda.org
We report the time-resolved spectral analysis of a bright near-infrared and moderate X-ray
flare of Sgr A⋆. We obtained light curves in the M, K, and H bands in the mid-and near …
flare of Sgr A⋆. We obtained light curves in the M, K, and H bands in the mid-and near …
A powerful flare from Sgr A* confirms the synchrotron nature of the X-ray emission
We present the first fully simultaneous fits to the near-infrared (NIR) and X-ray spectral slope
(and its evolution) during a very bright flare from Sgr A*, the supermassive black hole at the …
(and its evolution) during a very bright flare from Sgr A*, the supermassive black hole at the …
Source-intrinsic near-infrared properties of Sgr A*: total intensity measurements
G Witzel, A Eckart, M Bremer… - The Astrophysical …, 2012 - iopscience.iop.org
We present a comprehensive data description for K s-band measurements of Sgr A*. We
characterize the statistical properties of the variability of Sgr A* in the near-infrared, which …
characterize the statistical properties of the variability of Sgr A* in the near-infrared, which …
Fifteen years of XMM–Newton and Chandra monitoring of Sgr A★: evidence for a recent increase in the bright flaring rate
We present a study of the X-ray flaring activity of Sgr A⋆ during all the 150 XMM–Newton
and Chandra observations pointed at the Milky Way centre over the last 15 years. This …
and Chandra observations pointed at the Milky Way centre over the last 15 years. This …
Simulations of imaging the event horizon of Sagittarius A* from space
F Roelofs, H Falcke, C Brinkerink… - Astronomy & …, 2019 - aanda.org
Context. It has been proposed that Very Long Baseline Interferometry (VLBI) at submillimeter
waves will allow us to image the shadow of the black hole in the center of our Milky Way …
waves will allow us to image the shadow of the black hole in the center of our Milky Way …
The two states of Sgr A* in the near-infrared: bright episodic flares on top of low-level continuous variability
K Dodds-Eden, S Gillessen, TK Fritz… - The Astrophysical …, 2011 - iopscience.iop.org
In this paper, we examine properties of the variable source Sgr A* in the near-infrared (NIR)
using a very extensive Ks-band data set from NACO/VLT observations taken in 2004–2009 …
using a very extensive Ks-band data set from NACO/VLT observations taken in 2004–2009 …