What is the expected mass of the supermassive black hole

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The H-alpha emission line from gas within a elliptical galaxy has a half-width of 6.5 Angstroms, representing a spread in velocity from opposite sides of the galaxy due to rotation. If the gas is effectively at a radius of 10 kpc from the center of the galaxy, what is the mass of the galaxy? Also, what is the expected mass of the supermassive black hole at the center of this galaxy?

Reference no: EM13339087

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