Astrophysics and Space Science

, Volume 143, Issue 2, pp 317–328 | Cite as

The ratio of total to selective absorption in the Carina OB2 association

  • B. García
  • J. J. Clariá
  • H. Levato
Article
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Abstract

Several previous studies in and around the Great Carina nebula (NGC 3372) have strongly indicated an abnormal interstellar extinction law with a high ratio of total to selective absorptionR. In the present study, newUBV photometric data and accurate MK spectral-types of stars in the region of the Carina OB2 association are used to show that (1) Car OB2 is a genuine stellar association located at a distance of 3.2 kpc, and (2) the interstellar extinction law seems to be normal throughout most of the region. A representative value ofR = Av/E(B − V) = 3.0 is derived for Car OB2 from the variable extinction method.

Keywords

High Ratio Selective Absorption Photometric Data Interstellar Extinction Extinction Method 
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Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • B. García
    • 1
  • J. J. Clariá
    • 2
  • H. Levato
    • 3
  1. 1.Facultad de Ciencias Astronómicas y GeofisicasUniversidad Nacional de La PlataArgentina
  2. 2.Observatorio AstronómicoUniversidad Nacional de CórdobaArgentina
  3. 3.Complejo Astronómico El LeoncitoSan JuanArgentina

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