The Structure and Variability of Sagittarius A:Zooming into the Supermassive Black Hole at the Galactic Center

YUAN Feng; ZHAO Jun-Hui

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Publications of the Yunnan Observatory > 2003 > 0(1): 41-54.

YUAN Feng, ZHAO Jun-Hui. The Structure and Variability of Sagittarius A:Zooming into the Supermassive Black Hole at the Galactic Center[J]. Publications of the Yunnan Observatory, 2003, (1): 41-54.

Citation:

YUAN Feng, ZHAO Jun-Hui. The Structure and Variability of Sagittarius A:Zooming into the Supermassive Black Hole at the Galactic Center[J]. Publications of the Yunnan Observatory, 2003, (1): 41-54.

Citation:

YUAN Feng, ZHAO Jun-Hui. The Structure and Variability of Sagittarius A:Zooming into the Supermassive Black Hole at the Galactic Center[J]. Publications of the Yunnan Observatory, 2003, (1): 41-54.

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The Structure and Variability of Sagittarius A:Zooming into the Supermassive Black Hole at the Galactic Center

YUAN Feng¹,
ZHAO Jun-Hui²

1.
Max-Planck-Institut fǜr Radioast ronomie, Auf dem Hǜgel 69, D-53121 Bonn, Germany
2.
Harvard-Smithsonian Center for Astrophysi cs, 60 Garden Street, MS 78, Cambridge, MA 02138, USA

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Received Date: October 07, 2002
Published Date: January 14, 2003

Graphical Abstract

Abstract

Abstract

The Galactic center provides a unique astrophysical laboratory for us to study various astrophysical processes.In this paper, we review and outline the latest results from observations of Sgr A in terms of source structure and variations in flux density.Sgr A phenomenon represents a typical case of low radiative efficiency accretion flow surrounding a supermassive black hole in low luminosity AGNs. Many pending astrophysical problems found from observations of Sgr A have challenged the existing astrophysical theories.Current theoretical models of Sgr A are also reviewed.
- accretion disks,
- black hole physics,
- active galaxies