Recent content by heavystray

Ok i understood. Thanks but is there any particular reason that Tc is significantly higher than Te for hot stars while lower for cooler stars?

if we use the above eq. when m(B-V)= 1.2, T= 3930 when m(B-V)= 1, T= 4420 when m(B-V)= 1.4, T= 3530 so the uncertainty of T= is 4420-3530? OR we have to do it separately on both sides? upper uncertainty= 3920-3530 lower uncertainty= 4420-3920 Thanks

I have a question regarding the results of my Physics investigation on Tc and Teff of stars. I found that the colour temperature that I calculated is significantly higher than the Teff for O and B stars. For mid temp stars, Tc is still more than Teff but the difference in small. But for cooler...

wait, how do you find the 4960?

if we use the above eq. when m(B-V)= 1.2, T= 3930 when m(B-V)= 1, T= 4420 when m(B-V)= 1.4, T= 3530

if we use the above eq. when m(B-V)= 1.2, T= 3930 when m(B-V)= 1, T= 4420 when m(B-V)= 1.4, T= 3530 so the uncertainty of T= is 4420-3530? OR we have to do it separately on both sides? upper uncertainty= 3920-3530 lower uncertainty= 4420-3920 Thanks

Wait, I'm really sorry, the equation supposed to have minus one after e, that's why i can't solve for T in terms of m(B-V) numerically. sorry again for uploading the wrong eq. thanks for the reply

what do you mean the for T is monotone? so the range would be divided by two right? thanks for the reply

yes it's easier to measure, but the question is, why does it affect the accuracy of temperature calculated based on the star's U-/B/B-V/V-R?? because we're just going to get either lower or higher values of B-V, V-R, R-I which correspond to temperatures. I mean for cooler stars, we already...

but the question is, why does it affect the accuracy of temperature calculated based on the star's U-/B/B-V/V-R?? because we're just going to get either lower or higher values of B-V, V-R, R-I which correspond to temperatures. I mean for cooler stars, we already expected their U-B will be low...

ughh thanks for pointing that out, sorry!

Hi, in determining the temperature of stars using colour index (U-B,B-V,V-R, etc), why do we need to use the appropriate pairs of filters based on their range of temperature? (this is what i read from wiki) For cool stars, we use R-I, and for hotter stars, we use B-V. I don't understand how...

i have an equation like this: Given m(B-V)= 1.2 +- 0.2 How do you calculate the uncertainty in T? (btw, I solve T using graphs by finding the intersection point) My idea was first to calculate T when m(B-V) =0.2, and I then calculate T when m(B-V)= 1.2 + 0.2(its uncertainty). and then find the...

hmmm no..but i think it's ok for now...i'll just solve it using graph, thanks!

How do you integrate it tho? It'd be great if you can show step by step on how to do it, thanks for answering.