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The white dwarf mass-radius relation with Gaia, Hubble and FUSE

Published online by Cambridge University Press:  07 March 2018

Simon R. G. Joyce ,
Martin A. Barstow ,
Sarah L. Casewell ,
Jay B. Holberg  and
Howard E. Bond
Simon R. G. Joyce
Affiliation:
Dept. of Physics & Astronomy, University of Leicester, University Road, Leicester, LE1 7RH email: [email protected]@[email protected]
Martin A. Barstow
Affiliation:
Dept. of Physics & Astronomy, University of Leicester, University Road, Leicester, LE1 7RH email: [email protected]@[email protected]
Sarah L. Casewell
Affiliation:
Dept. of Physics & Astronomy, University of Leicester, University Road, Leicester, LE1 7RH email: [email protected]@[email protected]
Jay B. Holberg
Affiliation:
University of Arizona, LPL, Tucson, AZ, USA email: [email protected]
Howard E. Bond
Affiliation:
Pennsylvania State University, University Park, PA, USA email: [email protected]
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Abstract

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White dwarfs are becoming useful tools for many areas of astronomy. They can be used as accurate chronometers over Gyr timescales. They are also clues to the history of star formation in our galaxy. Many of these studies require accurate estimates of the mass of the white dwarf. The theoretical mass-radius relation is often invoked to provide these mass estimates. While the theoretical mass-radius relation is well developed, observational tests of this relation show a much larger scatter in the results than expected. High precision observational tests to confirm this relation are required. Gaia is providing distance measurements which will remove one of the main source of uncertainty affecting most previous observations. We combine Gaia distances with spectra from the Hubble and FUSE satelites to make precise tests of the white dwarf mass-radius relation.

Keywords

stars : distancesstars : white dwarfsstars : fundamental parameters : masses : radii
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S330: Astrometry and Astrophysics in the Gaia sky , April 2017 , pp. 301 - 304
Copyright
Copyright © International Astronomical Union 2018 

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