Physics, 13.07.2019 00:20 niele123

An sb galaxy has an absolute magnitude in the b band of -20.21. estimate the isophotal radius at 30 b- mag arc sec-2. estimate the rotational velocity of the galaxy. estimate the angular rotation speed of a star at the isophotal radius in arcsec /yr.

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An sb galaxy has an absolute magnitude in the b band of -20.21. estimate the isophotal radius at 30...

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