Relativistic signatures at the Galactic Center

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution


Studies of the inner few parsecs at the Galactic Centre provide evidence of a 4×106Mʘ supermassive black hole, associated with the unusual, variable radio and infrared source Sgr A*.

Our major aim is the study and analysis of the physical processes responsible for the variable emission from the compact radio source Sgr A*. In order to understand the physics behind the observed variability, we model the time evolution of the flare emitting region by studying light curves and spectra of emission originating at the surface of the accretion disk, close to the event horizon, near the marginally stable orbit of a rotating black hole.

Here we discuss the methods used in the analysis of the time-variable spectral features and subsequently present preliminary modeling results.
Original languageEnglish
Title of host publicationDark matter in astrophysics and particle physics
Subtitle of host publicationproceedings of the 7th International Heidelberg Conference on Dark 2009, Christchurch, New Zealand, 18 – 24 January 2009
EditorsHans Volker Klapdor-Kleingrothaus, Irina V. Krivosheina
Place of PublicationSingapore ; Hackensack, N.J.
PublisherWorld Scientific Publishing
Number of pages5
ISBN (Electronic)9789814465748
ISBN (Print)9789814293785
Publication statusPublished - 2009
Event7th International Heidelberg Conference on Dark Matter in Astrophysics and Particle Physics (DARK 2009) - Christichurch, New Zealand
Duration: 18 Jan 200924 Jan 2009


Conference7th International Heidelberg Conference on Dark Matter in Astrophysics and Particle Physics (DARK 2009)
CityChristichurch, New Zealand


  • Sgr A*
  • light curve
  • hot spot
  • black hole physics
  • Galactic Center
  • accretion disc
  • relativity effects

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