|Feb14-09, 01:05 PM||#1|
Calculating absolute magnitude and apparent magnitude
Ummm... never mind, we found it...
1. The problem statement, all variables and given/known data
Given Proxima Centauri with parallax angle of 0.769" and apparent bolometric magnitude of 11.1... what is its absolute magnitude?
2. Relevant equations
I get that I should use m-M = 5 log10(d/10 pc) and I understand that d = 1/p".
What I really need to know is: what do I use to get apparent magnitude? After I get m I can plug and chug, and I'm fine with that... but how do I get m?
Apparent magnitude was not given and I can't look it up for a quiz or test.
3. The attempt at a solution
m-M = 5 log10 [(1/0.769)/10]
or M = m - 5 log10 (.1300)
But I'm still stuck on where to go for m...
Lori the Totally Lost English Major
|Feb14-09, 05:10 PM||#2|
They gave you the "apparent bolometric magnitude", just use that. The only difference between that and "apparent visual magnitude" is what wavelengths of light are being measured.
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