The spectrum of SGR A* and its variability

Duschl, Wolfgang J. und Lesch, Harald (1994): The spectrum of SGR A* and its variability. In: Astronomy and Astrophysics, Bd. 286, Nr. 2: S. 431-436

Abstract

We demonstrate that there is only one physical process required to explain the spectrum and the variability of the radio source at the dynamical center of our Galaxy, Sgr A*, in the frequency range from =~1 to =~1000 GHz, namely optically thin synchrotron radiation that is emitted from a population of relativistic electrons. We attribute the observed variability to variable energy input from an accretion disk around Sgr A* into the acceleration of the electrons.

• Dokumententyp: Zeitschriftenartikel
• Publikationsform: Publisher's Version
• Keywords: accretion disks; electron plasma; radio astronomy; radio sources (astronomy); radio spectra; relativistic electron beams; synchrotron radiation; variability; galactic bulge; magnetohydrodynamics; particle acceleration; astrophysics; acceleration of particles; accretion; accretion disks; magnetohydrodynamics (mhd); galaxy: center; radio continuum: galaxies; astrophysics
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 520 Astronomie ; 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0004-6361
• Sprache: Englisch