Astrometry with the macho data archive. I. High proper motion stars toward the galactic bulge and magellanic clouds

SIAMS-ED Study Group

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13 Citations (Scopus)

Abstract

We present the preliminary results of our astrometric study of stellar motions along the lines of sight of the Magellanic Clouds and the Galactic bulge. Using 5 years of MACHO project point-spread function photometry, we find that we can easily select stars with proper motions of 0″.03 yr -1 from these very dense fields, using the characteristic shapes of their light curves. By performing astrometry on photometrically selected, candidate, high proper motion (HPM) stars in 50 deg 2 , we have discovered 154 new HPM stars from ∼55 million stars monitored by the MACHO project. These new objects have proper motions as high as 0″.5 yr -1 , brightnesses ranging from V ∼ 19 to V - 19, and V - R colors between 0.3 and 1.45.

Original languageEnglish
Pages (from-to)337-347
Number of pages11
JournalAstrophysical Journal
Volume562
Issue number1
DOIs
Publication statusPublished - 1 Jan 2001

Keywords

  • Astrometry
  • Catalogs
  • Solar neighborhood
  • Stars: kinematics
  • Stars: low-mass, brown dwarfs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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