What is the distance to a galaxy if a Type 1a supernova with an apparent magnitude of + 18m is found in it?
| September 17, 2020 | Education
What is the distance to a galaxy if a Type 1a supernova with an apparent magnitude of + 18m is found in it? On average, the absolute stellar magnitude of type 1a supernovae is -17.5m.
Absolute stellar magnitude М = m + 5 -5lg R
-17.5 = +18 + 5 – 51g R, log R = 8.1, R = 126,000,000 pc = 126 Mpc
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