SIMBAD references

2018ApJ...862..173T - Astrophys. J., 862, 173-173 (2018/August-1)

Parallaxes of cool objects with WISE: filling in for Gaia.

THEISSEN C.A.

Abstract (from CDS):

This paper uses the multi-epoch astrometry from the Wide-field Infrared Survey Explorer (WISE) to demonstrate a method to measure proper motions and trigonometric parallaxes with precisions of ∼4 mas yr–1 and ∼7 mas, respectively, for low-mass stars and brown dwarfs. This method relies on WISE single exposures (Level 1b frames) and a Markov Chain Monte Carlo method. The limitations of Gaia in observing very low-mass stars and brown dwarfs are discussed, and it is shown that WISE will be able to measure astrometry past the 95% completeness limit and magnitude limit of Gaia (L, T, and Y dwarfs fainter than G ≃ 19 and G = 21, respectively). This method is applied to WISE data of 20 nearby (<=17 pc) dwarfs with spectral types between M6-Y2 and previously measured trigonometric parallaxes. Also provided are WISE astrometric measurements for 23 additional low-mass dwarfs with spectral types between M6-T7 and estimated photometric distances <17 pc. Only nine of these objects contain parallaxes within Gaia Data Release 2.

Abstract Copyright: © 2018. The American Astronomical Society.

Journal keyword(s): astrometry - brown dwarfs - parallaxes - proper motions - stars: low-mass - techniques: miscellaneous

VizieR on-line data: <Available at CDS (J/ApJ/862/173): table.dat>

Simbad objects: 44

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2020.02.23-21:58:25

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