OGLE-II high proper motion stars towards the Galactic Centre

2007/12/18 by Nicholas J. Rattenbury, Shude Mao
Physics and Astronomy · Social Sciences · #Astrometry #Astronomy and Astrophysical Research #Educational Leadership and Practices #Gravitational microlensing #Kinematics #Photometry (optics) #Proper motion #Stars #Stellar classification #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.1111/j.1365-2966.2008.12878.x

7 figures and 4 tables, MNRAS, accepted

arxiv created 2007/12/18 · openalex publication_date 2008/02/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The photometry data base of the second phase of the OGLE microlensing experiment, OGLE-II, is a rich source of information about the kinematics and structure of the Galaxy. In this work, we use the OGLE-II proper motion catalogue to identify candidate stars which have high proper motions. 521 stars with proper motion > 50 mas yr -1 in the OGLE-II proper motion catalogue were cross-identified with stars in the MACHO high proper motion catalogue, and the DEep Near-Infrared Survey and Two-Micron All-Sky Survey infrared photometry catalogues. Photometric distances were computed for stars with colours consistent with G/K-and M-type stars. Six stars were newly identified as possible nearby (<50 pc) M dwarfs.

Citations

• Evidence for gravitational microlensing by dark objects in the Galactic halo
• The MACHO Project: Microlensing Optical Depth toward the Galactic Bulge from Difference Image Analysis
• Meeting the Cool Neighbors. IV. 2MASS 1835+32, a Newly Discovered M8.5 Dwarf within 6 Parsecs of the Sun
• The Optical Gravitational Lensing Experiment: catalogue of stellar proper motions in the OGLE-II Galactic bulge fields
• Real-time difference imaging analysis of MOA Galactic bulge observations during 2000
• Photometric detection of high proper motions in dense stellar fields using difference image analysis