Rapid X-ray flaring from the direction of the supermassive black hole at the Galactic Centre

@article{Baganoff2001RapidXF,
  title={Rapid X-ray flaring from the direction of the supermassive black hole at the Galactic Centre},
  author={Frederick K. Baganoff and Marshall W. Bautz and W. N. Brandt and G. Chartas and Eric D. Feigelson and Gordon P. Garmire and Yoji Maeda and Mark R. Morris and George R. Ricker and Leisa K. Townsley and Fabian Walter},
  journal={Nature},
  year={2001},
  volume={413},
  pages={45-48}
}
The nuclei of most galaxies are now believed to harbour supermassive black holes. The motions of stars in the central few light years of our Milky Way Galaxy indicate the presence of a dark object with a mass of about 2.6 × 106 solar masses (refs 2, 3). This object is spatially coincident with the compact radio source Sagittarius A* (Sgr A*) at the dynamical centre of the Galaxy, and the radio emission is thought to be powered by the gravitational potential energy released by matter as it… 

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References

SHOWING 1-10 OF 36 REFERENCES
Chandra X-Ray Spectroscopic Imaging of Sagittarius A* and the Central Parsec of the Galaxy
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 with the supermassive
Advection-Dominated Accretion Model of Sagittarius A ∗ : Evidence for a Black Hole at the Galactic Center
Sagittarius A*, which is located at the Galactic center, is a puzzling source. It has a mass of M = (2.5 ± 0.4) × 106 M☉, which makes it an excellent black hole candidate. Observations of stellar
The accelerations of stars orbiting the Milky Way's central black hole
TLDR
Measurements of the accelerations of three stars from the central radio source Sagittarius A* increase the inferred minimum mass density in the central region of the Galaxy by an order of magnitude relative to previous results, and localize the dark mass to within 0.05 ± 0.04 arcsec of the nominal position of Sgr A*.
VARIABILITY OF ACTIVE GALACTIC NUCLEI
▪ Abstract A large collective effort to study the variability of active galactic nuclei (AGN) over the past decade has led to a number of fundamental results on radio-quiet AGN and blazars. In
The jet model for Sgr A*: radio and X-ray spectrum
The preliminary detection of the Galactic Center black hole Sgr A* in X-rays by the Chandra mission, as well as recent mm-VLBI measurements, impose strict constraints on this source. Using a
An accreting black hole model for sagittarius A
Several observations, notably of broad He I, Br-alpha, and Br-gamma emission lines from the vicinity of IRS 16, indicate the presence of a strong circumnuclear wind near the dynamical center of the
A Magnetic Dynamo Origin for the Submillimeter Excess in Sagittarius A
The submillimeter bump observed in the spectrum of Sgr A* appears to indicate the existence of a compact emitting component within several Schwarzschild radii, rS, of the nucleus at the Galactic
X-Ray Variability as a Probe of Advection-dominated Accretion in Low-Luminosity Active Galactic Nuclei
As a class, LINERs and low-luminosity active galactic nuclei (LLAGNs) tend to show little or no significant short-term variability (i.e., with timescales less than a day). This is a marked break from
X-raying the interstellar medium: ROSAT observations of dust scattering halos
We have studied X-ray halos around 25 point sources and four supernova remnants using ROSAT observations. All sources were observed during the ROSAT all-sky survey, 8 point-like sources and 2
The Position of Sagittarius A*: Accurate Alignment of the Radio and Infrared Reference Frames at the Galactic Center
We present a novel approach to the long-standing problem of locating the position of the compact nonthermal radio source Sgr A* on infrared images of the Galactic center region. Using the Very Large
...
1
2
3
4
...