OGLE-II High Proper Motion Stars towards the Galactic centre

TL;DR

This study utilizes OGLE-II proper motion data to identify high proper motion stars, discovering six new potential nearby M dwarfs within 50 parsecs, enhancing understanding of local stellar populations.

Contribution

The paper presents the first cross-identification of OGLE-II high proper motion stars with infrared catalogs, discovering new nearby M dwarfs and providing insights into Galactic kinematics.

Findings

Identified 521 high proper motion stars in OGLE-II.

Cross-matched with MACHO, DENIS, and 2MASS catalogs.

Discovered 6 new potential nearby M dwarfs.

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 mu > 50 mas/yr in the OGLE-II proper motion catalogue (Sumi 2004) were cross-identified with stars in the MACHO high proper motion catalogue, and the DENIS and 2MASS infra-red photometry catalogues. Photometric distances were computed for stars with colours consistent with G/K and M type stars. 6 stars were newly identified as possible nearby (< 50 pc) M dwarfs.