Extinction law -- How big is the extinction in the H-band?

[CharlesDamle]

Homework Statement

How big is the extinction in the H-band?

Relevant Equations

E(B-V) = A_B - A_V

Hey, I'm totally blank on this problem, and I'm not even sure what to solve for.

I'm told that the H band, which is in 1.63 μm, has an extinction law A_H = 0.591 * E(B - V) and I'm supposed to answer how big the extinction is in the H band.

And I'm confused because it involves the difference between the B and V band, and I'm not sure why I should use the wavelength of the H band. I'm tempted to say it is just 0.591
I'd appreiate any input.

 

[phyzguy]

Here are some links. Also, don't you have a textbook on the subject?
https://en.wikipedia.org/wiki/Extinction_(astronomy)
https://astronomy.swin.edu.au/cosmos/i/interstellar+reddening
https://iopscience.iop.org/article/10.1086/587791/fulltext/71728.text.html

You should be able to find E(B-V) since you know the extinction in the V-band. From there you can calculate the extinction in the H-band.

 

[CharlesDamle]

Thank you for the links.
No, it doesn't the equation, just states it in the introductory chapter.

 

[phyzguy]

Thank you for the links.
No, it doesn't the equation, just states it in the introductory chapter.

So are you able to solve the problem now?

 

[CharlesDamle]

So are you able to solve the problem now?

Yes, I figured it out :)