Long Term Variability in Dwarf M Stars (original) (raw)

NASA/ADS

Abstract

Broadband VRI observations for 43 dwarf M stars have been made over the period 1980-1991, and 21 of them, including eight UBV standard stars, show long term variability at the 95% confidence level. While it undoubtedly exists, periodic behavior cannot be demonstrated from these data except perhaps in the cases of GL 213 and GL 876 which appear to show periods of 2.7 and 2.9 yr, respectively. Substantial short term variations in the light of GL 277A (= VV Lyn) are also noted.

Publication:

The Astronomical Journal

Pub Date:

March 1994

DOI:

10.1086/116925

Bibcode:

1994AJ....107.1135W

Keywords:

• Astronomical Photometry;
• Brightness;
• Broadband;
• Dwarf Stars;
• Long Term Effects;
• M Stars;
• Time Dependence;
• Variability;
• Astronomical Observatories;
• Gallium Arsenides;
• Photomultiplier Tubes;
• Telescopes;
• Astrophysics;
• STARS: PECULIAR;
• STARS: OSCILLATIONS;
• VARIABLES: DWARF M STARS