Published November 20, 2016
| Published
Journal Article
Open
Distance-dependent Offsets between Parallaxes for Nearby Stars and Gaia DR1 Parallaxes
Abstract
We use 612 single stars with previously published trigonometric parallaxes placing them within 25 pc to evaluate parallaxes released in Gaia's first data release (DR1). We find that the Gaia parallaxes are, on average, 0.24 ± 0.02 mas smaller than the weighted mean trigonometric parallax values for these stars in the solar neighborhood. We also find that the offset changes with distance out to 100 pc, in the sense that the closer the star, the larger the offset. We find no systematic trends in the parallax offsets with stellar V magnitude, V − K color, or proper motion. We do find that the offset is roughly twice as large for stars south of the ecliptic compared to those that are north.
Additional Information
© 2016. The American Astronomical Society. Received 2016 October 12; revised 2016 November 1; accepted 2016 November 2; published 2016 November 18. We thank the anonymous referee and N. Hambly for providing us with valuable comments that improved this manuscript. Work on constructing this 25 pc sample has been supported by National Science Foundation under grants AST-0507711, AST-0908402, AST-1109445, and AST-141206. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC; http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular, the institutions participating in the Gaia Multilateral Agreement.Attached Files
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Additional details
- Eprint ID
- 72132
- Resolver ID
- CaltechAUTHORS:20161117-132744421
- AST-0507711
- NSF
- AST-0908402
- NSF
- AST-1109445
- NSF
- AST-141206
- NSF
- NASA/JPL/Caltech
- Gaia Multilateral Agreement
- Created
-
2016-11-17Created from EPrint's datestamp field
- Updated
-
2021-11-11Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)