Precise masses for wolf 1062 AB from hubble space telescope interferometric astrometry and Mcdonald observatory radial velocities

G. F. Benedict, B. E. McArthur, O. G. Franz, L. H. Wasserman, T. J. Henry, T. Takato, I. V. Strateva, J. L. Crawford, P. A. Ianna, D. W. McCarthy, E. Nelan, W. H. Jefferys, W. Van Altena, P. J. Shelus, P. D. Hemenway, R. L. Duncombe, D. Story, A. L. Whipple, A. J. Bradley, L. W. Fredrick

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

We present an analysis of astrometric data from Fine Guidance Sensor 3 (FGS 3), a white-light inter& ferometer on HST, and of radial velocity data from two ground-based campaigns. We model the astro& metric and radial velocity measurements simultaneously to obtain parallax, proper motion, and component masses for Wolf 1062 (G1 748; M3.5 V). To derive the mass fraction, we relate FGS 3 fringe scanning observations of the science target to a reference frame provided by fringe tracking observations of a surrounding star field. We obtain an absolute parallax (πabs = 98.0 ± 0.4 mas) yielding MA = 0.379 ± 0.005 M and MB = 0.192 ± 0.003 M, high-quality component masses with errors of only 1.5%.

Original languageEnglish (US)
Pages (from-to)1607-1613
Number of pages7
JournalAstronomical Journal
Volume121
Issue number3
DOIs
StatePublished - Mar 2001

Keywords

  • Astrometry
  • Binaries: general
  • Stars: distances
  • Stars: fundamental parameters
  • Stars: individual (Wolf 1062)
  • Stars: late-type
  • Techniques: interferometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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