The Gaia DR1 mass-radius relation for white dwarfs

被引：48

作者：

Tremblay, P. -E. ^{[1
]}

Gentile-Fusillo, N. ^{[1
]}

Raddi, R. ^{[1
]}

Jordan, S. ^{[2
]}

Besson, C. ^{[3
]}

Gansicke, B. T. ^{[1
]}

Parsons, S. G. ^{[4
]}

Koester, D. ^{[5
]}

Marsh, T. ^{[1
]}

Bohlin, R. ^{[6
]}

Kalirai, J. ^{[6
]}

Deustua, S. ^{[6
]}

机构：

[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[2] Heidelberg Univ, Astron Rechen Inst, Zentrum Astron, D-69120 Heidelberg, Germany

[3] Arts & Metiers ParisTech Ctr Bordeaux Talence, Esplanade Arts & Metiers, F-33400 Talence, France

[4] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

[5] Univ Kiel, Inst Theoret Phys & Astrophys, D-24098 Kiel, Germany

[6] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2017年 / 465卷 / 03期

基金：

欧洲研究理事会; 英国科学技术设施理事会;

关键词：

parallaxes; stars: distances; stars: fundamental parameters; stars: interiors; white dwarfs; DIGITAL SKY SURVEY; ZZ CETI STARS; SPACE-TELESCOPE SPECTROSCOPY; FULLY EVOLUTIONARY MODELS; ATMOSPHERIC PARAMETERS; ASTROMETRIC SOLUTION; LUMINOSITY FUNCTION; STELLAR PARAMETERS; BINARY-SYSTEMS; STANDARD STARS;

D O I：

10.1093/mnras/stw2854

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Gaia Data Release 1 (DR1) sample of white dwarf parallaxes is presented, including six directly observed degenerates and 46 white dwarfs in wide binaries. This data set is combined with spectroscopic atmospheric parameters to study the white dwarf mass-radius relationship (MRR). Gaia parallaxes and G magnitudes are used to derive model atmosphere-dependent white dwarf radii, which can then be compared to the predictions of a theoretical MRR. We find a good agreement between Gaia DR1 parallaxes, published effective temperatures (T-eff) and surface gravities ( log g), and theoretical MRRs. As it was the case for Hipparcos, the precision of the data does not allow for the characterization of hydrogen envelope masses. The uncertainties on the spectroscopic atmospheric parameters are found to dominate the error budget and current error estimates for well-known and bright white dwarfs may be slightly optimistic. With the much larger Gaia DR2 white dwarf sample, it will be possible to explore the MRR over a much wider range of mass, T-eff, and spectral types.

引用

页码：2849 / 2861

页数：13

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