Suppose That Scientists in the Future Are Able to Observe

question 92

Multiple Choice

Suppose that scientists in the future are able to observe a star orbiting the central region of the Andromeda Galaxy and find that it has an orbital period of 31 years and a semimajor axis of 4,500 AU.The mass of Andromeda's central black hole must then be around

• A) 4.0 * 10⁶ M_SUN
• B) 9.5 *10⁶ M_SUN
• C) 4.0 * 10⁷ M_SUN
• D) 9.5 * 10⁷ M_SUN
• E) 4.0 * 10⁸ M_SUN

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