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I Stellar reddening via Av calculation

  1. Jul 11, 2017 #1
    Hello, please do somebody have some experiences with calculating of stellar reddening via interstellar extinction? I made some calculation based on apparent and absolute magnitudes and distances of brigthtness star but maximum Av which I got for Betelgeuse was 1.12 mag ( for its maximum aparent magnitude since it is variable star) and for Deneb 0.11 mag.
    This results are in disagreement with Av presented in literature which reached values at least about 5-10 mag or more ( for example I found some equation Av (mag) = 2*d(kpc) for latitude b to 2 o and Av (mag) = 0.18/sin (b) for b over 10 o...
    Thank you very much
  2. jcsd
  3. Jul 16, 2017 #2
    Thanks for the thread! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? The more details the better.
  4. Jul 17, 2017 #3
    thank you. I can say that maybe , here is problem that is not clear if apparent and absolute magnitudes which I found posted on net are these calculated according to equation which neglected extinction or these which was real measured.

    Thank you
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