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The Orbits of a Few Dozen Stars Have Been Carefully

Question 2

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The orbits of a few dozen stars have been carefully monitored over a few decades in the proximity of the supermassive black hole at the center of the Milky Way (see the figure shown below) .One example is the so-called star SO-1, whose semimajor axis is 3,300 AU long and has a period of 94.1 years.What is the estimated mass of the central supermassive black hole? The orbits of a few dozen stars have been carefully monitored over a few decades in the proximity of the supermassive black hole at the center of the Milky Way (see the figure shown below) .One example is the so-called star SO-1, whose semimajor axis is 3,300 AU long and has a period of 94.1 years.What is the estimated mass of the central supermassive black hole?   A)  3.4 *10<sup>6</sup> M<sub>SUN</sub> B)  7.6 * 10<sup>9</sup> M<sub>SUN</sub> C)  1.5 * 10<sup>8</sup> M<sub>SUN</sub> D)  4.0 * 10<sup>6</sup> M<sub>SUN</sub> E)  3.4* 10<sup>11</sup> M<sub>SUN</sub>


A) 3.4 *106 MSUN
B) 7.6 * 109 MSUN
C) 1.5 * 108 MSUN
D) 4.0 * 106 MSUN
E) 3.4* 1011 MSUN

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