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23 April 2024 |
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The Structure and Variability of Sagittarius A*: Zooming in to the Supermassive Black Hole at the Galactic Center | | Feng Yuan
; Jun-Hui Zhao
; | | Date: |
5 Mar 2002 | | Subject: | astro-ph | | Affiliation: | MPIfR), Jun-Hui Zhao (CfA | | 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. | | Source: | arXiv, astro-ph/0203050 | | Services: | Forum | Review | PDF | Favorites | |
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