Journal Article

Fundamental parameters and infrared excesses of <i>Hipparcos</i> stars

I. McDonald, A. A. Zijlstra and M. L. Boyer

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 427, issue 1, pages 343-357
Published in print November 2012 | ISSN: 0035-8711
Published online November 2012 | e-ISSN: 1365-2966 | DOI:
Fundamental parameters and infrared excesses of Hipparcos stars

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We derive the fundamental parameters (temperature and luminosity) of 107 619 Hipparcos stars and place these stars on a true Hertzsprung–Russell diagram. This is achieved by comparing bt-settl model atmospheres to spectral energy distributions (SEDs) created from Hipparcos, Tycho, Sloan Digital Sky Survey, DENIS, Two Micron All Sky Survey, MSX, AKARI, IRAS and Wide-field Infrared Survey Explorer data. We also identify and quantify from these SEDs any infrared excesses attributable to circumstellar matter. We compare our results to known types of objects, focusing on the giant branch stars. Giant star dust production (as traced by infrared excess) is found to start in earnest around 680 L.

Keywords: circumstellar matter; stars: fundamental parameters; Hertzsprung–Russell and colour–magnitude diagrams; stars: mass-loss; solar neighbourhood; infrared: stars

Journal Article.  10390 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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