Flare emission from Sagittarius A*
Journal of Physics: Conference Series, 2012 14 pages, 3 figures, Conf. Proc. The Central Kiloparsec in Galactic Nuclei; Astronomy at High Angular Resolution 2011 (AHAR2011), held 29.8.2011-2.9.2011 at the DPG Physikzentrum Bad Honnef (Cologne/Bonn ...
Eckart, A. +20 more
openaire +2 more sources
THE INTRINSIC TWO-DIMENSIONAL SIZE OF SAGITTARIUS A* [PDF]
The Astrophysical Journal, 2014 accepted for publication in ...
Geoffrey C. Bower +11 more
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Testing General Relativity with the Black Hole Shadow Size and Asymmetry of Sagittarius A*: Limitations from Interstellar Scattering [PDF]
Astrophysical Journal, 2018 The Event Horizon Telescope, a global 230 GHz very-long-baseline interferometry array, achieves angular resolution of , sufficient to resolve the supermassive black hole Sagittarius A* (Sgr A*).
Ziyan Zhu +2 more
semanticscholar +1 more source
Testing alternative theories of gravity by fitting the hot-spot data of Sgr A*
European Physical Journal C: Particles and Fields, 2022 We are fitting dynamics of electrically neutral hot-spot orbiting around Sagittarius A* (Sgr A*) source in Galactic center, represented by various modifications of the standard Kerr black hole (BH), to the three flares observed by the GRAVITY instrument ...
Misbah Shahzadi +3 more
doaj +1 more source
TIME-DEPENDENT MODELS OF FLARES FROM SAGITTARIUS A* [PDF]
The Astrophysical Journal, 2010 The emission from Sgr A*, the supermassive black hole in the Galactic Center, shows order of magnitude variability ("flares") a few times a day that is particularly prominent in the near-infrared (NIR) and X-rays. We present a time-dependent model for these flares motivated by the hypothesis that dissipation of magnetic energy powers the flares.
Dodds-Eden, Katie +6 more
openaire +4 more sources
Galactic Centre Pulsars with the SKAO
The Open Journal of AstrophysicsThe detection of a pulsar closely orbiting our Galaxy’s supermassive black hole - Sagittarius A* - is one of the ultimate prizes in pulsar astrophysics.
Federico Abbate +21 more
doaj +1 more source
The disc-jet symbiosis emerges: Modelling the emission of Sagittarius A* with electron thermodynamics [PDF]
, 2016 We calculate the radiative properties of Sagittarius A* -- spectral energy distribution, variability, and radio-infrared images -- using the first 3D, physically motivated black hole accretion models that directly evolve the electron thermodynamics in ...
S. Ressler +3 more
semanticscholar +1 more source
Revealing the Structure and Internal Rotation of the Sagittarius Dwarf Spheroidal Galaxy with Gaia and Machine Learning [PDF]
, 2021 Andrés del Pino +5 more
openalex +1 more source
THE VARIABILITY OF SAGITTARIUS A* AT 3 MILLIMETER [PDF]
The Astrophysical Journal, 2008 25 pages, 6 figures, accepted by ...
Li, Juan +7 more
openaire +2 more sources
Observations of Sagittarius A* during the pericenter passage of the G2 object with MAGIC [PDF]
, 2016 Context. We present the results of a multi-year monitoring campaign of the Galactic center (GC) with the MAGIC telescopes. These observations were primarily motivated by reports that a putative gas cloud (G2) would be passing in close proximity to the ...
M. L. Ahnen +155 more
semanticscholar +1 more source