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MS, S and C Stars in the Infrared. Luminosities and Mass Loss Rates

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 نشر من قبل Roald Guandalini
 تاريخ النشر 2008
  مجال البحث فيزياء
والبحث باللغة English
 تأليف R. Guandalini




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In this note I present an outline of infrared (IR) photometric AGB properties, based on two samples of Galactic Long Period Variables (C- and S-type respectively). I show the various selection criteria used during the choice of the sources and describe the motivations of observing them at near- and mid-IR wavelengths. I discuss the problems encountered in estimating their luminosity and distance and motivate the methods I choose for this purpose. Properties of the luminosity functions and of the Hertzsprung-Russell (HR) diagrams obtained from the analysis are discussed. Finally, the choices made for estimating of the mass loss rates are described and preliminary results concerning them are shown.



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