Luminosity Classification of Potential M Dwarf Stars Selected using 2MASS and Tycho2 Data

Astronomy and Astrophysics – Astronomy

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Scientific paper

A sample of possible red dwarf stars selected using photometric criteria from the 2MASS catalog and proper motion data from the TYCHO2 catalog has been investigated to evaluate the effectiveness of the selection process. Program stars have been identified using the J-H and H-K two color diagram to identify potential red dwarf stars. Those stars having Tycho2 proper motions in excess of 0.050 arcsec/yr were included in the sample. Intermediate-band CaH photometry and Kron-Cousins R and I photometry have been obtained using the SARA (Southeastern Association for Research in Astronomy) Telescope. The SARA photometric data were used to determine luminosity classes for program stars. The addition of proper motion data in program star selection has significantly improved the selection of red dwarf stars using 2MASS data. This study used data collected with the SARA Telescope and was funded by grants from the Indiana Space Grant Consortium and Ball State University.

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