Infrared properties of OH/IR stars. I. Near infrared observation and some physical parameters of OH/IR stars.

Astronomy and Astrophysics – Astrophysics

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Stars: Fundamental Parameters, Stars: Evolution, Stars: Agb, Infrared: Stars

Scientific paper

We present near infrared observations of 59 Type II OH/IR stars with their IRAS data. Using different color-color diagrams, some properties of OH/IR stars are analysed. Some physical parameters are statistically derived by fitting the infrared photometric data with a "double blackbody model", and a correlation between color temperatures and periods is found for Type II OH/IR stars. Several possible correlations are found between the evolutionary status of OH/IR stars and their near infrared properties, and we try to describe an evolutionary scheme for the OH/IR stars.

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