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| Paper: |
High-resolution Millimeter-VLBI Study of Sgr A* — A Supermassive Black Hole at the Galactic Center |
| Volume: |
373, The Central Engine of Active Galactic Nuclei |
| Page: |
37 |
| Authors: |
Shen, Z.-Q. |
| Abstract: |
We report on the millimeter-VLBI study of Sgr A*, which has revealed a wavelength-dependent (λ with β = 1.09+0.34 −0.32) intrinsic size with an intrinsic emitting region at 3.5 mm of 1 AU in diameter. When combined with the lower limit on the mass of Sgr A*, these size measurements provide strong evidence for Sgr A* being a supermassive black hole. We also detected a structural variation at 7 mm that results in an increase in the intrinsic size. |
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