Simulating VLBI images of Sgr A

Scott C. Noble, Po Kin Leung, Charles F. Gammie, Laura G. Book

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

Abstract

Very Long Baseline Interferometry (VLBI) at sub-millimeter/millimeter wavelengths shows promise at resolving the silhouette of the supermassive black hole at the Galactic Center, Sagittarius A* (Sgr A *), in the near future. In order to accurately test theoretical models of Sgr A* using these observations, a direct comparison of VLBI data to numerical models must be made. We present calculated images and spectra of Sgr A* using accretion disk simulation data from general relativistic magnetohydrodynamics (GRMHD) evolutions. Synchrotron and bremsstrahlung emission models are considered in the optically thin limit, which allows us to solve the radiative transfer equations using only simulation and geodesic data in a post-processing step. We show predictions of millimeter observations at the expected angular resolution limit and the spectrum's variability.

Original languageEnglish (US)
Title of host publication11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories - Proc. of the MG11 Meeting on General Relativity
PublisherWorld Scientific Publishing Co. Pte Ltd
Pages1078-1081
Number of pages4
ISBN (Print)9812834265, 9789812834263
DOIs
StatePublished - 2008
Event11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories, MG 2006 - Berlin, Germany
Duration: Jul 23 2006Jul 29 2006

Publication series

Name11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories - Proc. of the MG11 Meeting on General Relativity

Other

Other11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories, MG 2006
Country/TerritoryGermany
CityBerlin
Period7/23/067/29/06

Keywords

  • Accretion
  • Accretion disks
  • Galaxyxenter
  • MHD
  • Radiative transfer

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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