Studies of the Carina Nebula. V - The near infrared excess of O-type stars and the anomalous extinction law in their environment

Astronomy and Astrophysics – Astrophysics

Scientific paper

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B Stars, Interstellar Extinction, Nebulae, O Stars, Spectral Energy Distribution, Stellar Spectrophotometry, A Stars, Infrared Radiation

Scientific paper

From a photometric study of a sample of O, B and A-type stars located in the Carina Nebula, through 14 broad passbands between 0.3 to 4.0 μm, it is shown that the extinction law of the matter in the direction of the O-type stars is anomalous; this is not the case for most of the B and later type stars. The ratio of total to selective extinction of the O-type stars generally differs from star to star.

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