I have run into another selfteaching astronomy problem. Please correct were I am wrong because its not a matter of if. Now one method used to inicate stellar tempreture is by its coulour index. I'v been using the B-V index. Now weather I am using charts or using
B-V = -3.684 log(T) + 14.551
for log(T) < 3.961
B-V = 0.344 [log(T)]^2 -3.402 log(T) +8.037
for log(T) >3.961
Now these equation work great except sometimes I come across stars that don't quite make sense. I'm sure there is a reason I just have not come across one. Here is an example
Enter WR142 at 20:21:44.22 +37:22:30.7
Note the designation WR. Yes ladies and gents its a Wolfe Rayet star.
Well here is the problem Sinbad records its B-V as 1.43. That effectivly puts the stars tempreture at 3,644 kelvins. Well last time I check these things burn in excess of 40,000 kelvins.
Well I know what your saying well you should use more sources like a good astronomer. Well I did here are some other sources
Lick NPM2 Catalog reads the same star as B-V = 1.47 mag
7th Catalog of Galactic Wolf-Rayet stars reads B-V = 1.39 and a follow up observation of 1.38 all within reasonalbe range but none close enough to reach a tempreture of over 40,000k so were am i going wrong
Thank you in advance Please help me out self teaching bites....