Pierre Maxted p.maxted@keele.ac.uk
Testing Systematics of Gaia DR2 Parallaxes with Empirical Surface Brightness: Color Relations Applied to Eclipsing Binaries
Maxted
Authors
Abstract
Using a sample of 81 galactic, detached eclipsing binary stars we investigated the global zero-point shift of their parallaxes with the Gaia Data Release 2 (DR2) parallaxes. The stars in the sample lay in a distance range of 0.04–2 kpc from the Sun. The photometric parallaxes ?Phot of the eclipsing binaries were determined by applying a number of empirical surface brightness–color (SBC) relations calibrated on optical-infrared colors. For each SBC relation we calculated the individual differences dvi = (vGaia - vPhot)i and then we calculated unweighted and weighted means. As the sample covers the whole sky we interpret the weighted means as the global shifts of the Gaia DR2 parallaxes with respect to our eclipsing binary sample. Depending on the choice of the SBC relation the shifts vary from -0.094 to -0.025 mas. The weighted mean of the zero-point shift from all colors and calibrations used is d?=-0.054 ± 0.024 mas. However, the SBC relations based on (B - K) and (V - K ) colors, which are the least reddening dependent and have the lowest intrinsic dispersions, give a zero-point shift of d? = -0.031 ± 0.011 mas in full agreement with results obtained by Lindegren et al. and Arenou et al. Our result confirms the global shift of Gaia DR2 parallaxes of d? = -0.029 mas reported by the Gaia team, but we do not confirm the larger zero-point shift reported by a number of follow-up papers.
Citation
Maxted. (2019). Testing Systematics of Gaia DR2 Parallaxes with Empirical Surface Brightness: Color Relations Applied to Eclipsing Binaries. Astrophysical Journal, https://doi.org/10.3847/1538-4357/aafbed
Acceptance Date | Dec 12, 2018 |
---|---|
Publication Date | Feb 13, 2019 |
Journal | The Astrophysical Journal |
Print ISSN | 0004-637X |
Publisher | American Astronomical Society |
DOI | https://doi.org/10.3847/1538-4357/aafbed |
Keywords | binaries, eclipsing, parallaxes, stars, distances |
Publisher URL | https://doi.org/10.3847/1538-4357/aafbed |
Files
Graczyk_2019_ApJ_872_85.pdf
(1.7 Mb)
PDF
You might also like
TOI-5678b: A 48-day transiting Neptune-mass planet characterized with CHEOPS and HARPS
(2023)
Journal Article
Refined parameters of the HD 22946 planetary system and the true orbital period of planet d
(2023)
Journal Article
A new dynamical modeling of the WASP-47 system with CHEOPS observations
(2023)
Journal Article
The geometric albedo of the hot Jupiter HD 189733b measured with CHEOPS,
(2023)
Journal Article
Downloadable Citations
About Keele Repository
Administrator e-mail: research.openaccess@keele.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2025
Advanced Search