SIMBAD references

2017AJ....154...32S - Astron. J., 154, 32-32 (2017/July-0)

The solar neighborhood. XXXIX. Parallax results from the CTIOPI and NOFS programs: 50 new members of the 25 parsec white dwarf sample.

SUBASAVAGE J.P., JAO W.-C., HENRY T.J., HARRIS H.C., DAHN C.C., BERGERON P., DUFOUR P., DUNLAP B.H., BARLOW B.N., IANNA P.A., LEPINE S. and MARGHEIM S.J.

Abstract (from CDS):

We present 114 trigonometric parallaxes for 107 nearby white dwarf (WD) systems from both the Cerro Tololo Inter-American Observatory Parallax Investigation (CTIOPI) and the U. S. Naval Observatory Flagstaff Station (NOFS) parallax programs. Of these, 76 parallaxes for 69 systems were measured by the CTIOPI program and 38 parallaxes for as many systems were measured by the NOFS program. A total of 50 systems are confirmed to be within the 25-pc horizon of interest. Coupled with a spectroscopic confirmation of a common proper-motion companion to a Hipparcos star within 25 pc as well as confirmation parallax determinations for two WD systems included in the recently released Tycho Gaia Astrometric Solution catalog, we add 53 new systems to the 25-pc WD sample-a 42% increase. Our sample presented here includes four strong candidate halo systems, a new metal-rich DAZ WD, a confirmation of a recently discovered nearby short-period (P = 2.85 hr) double degenerate, a WD with a new astrometric perturbation (long period, unconstrained with our data), and a new triple system where the WD companion main-sequence star has an astrometric perturbation (P ∼ 1.6 year).

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): astrometry - Galaxy: evolution - solar neighborhood - stars: distances - white dwarfs - white dwarfs

VizieR on-line data: <Available at CDS (J/AJ/154/32): table[1-4].dat figure1.dat figure3.dat figure7.dat>

Errata: erratum vol. 154, art. 130 (2017)

Simbad objects: 113

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2021.05.17-21:40:55

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