A&A Supplement Series, Vol. 125, November I 1997, 511-521

Received March 8; accepted February 12, 1997

Radio burst statistics for M dwarf flare stars

M. Abada-Simon and M. Aubier

  ARPEGES/URA CNRS 1757, Observatoire de P aris, 92190 Meudon, France
  Universit\151 de Versailles Saint-Quentin-en-Yvelines, France

Abstract:

We present a critical analysis on the number of bursts near 21 cm from nine dMe flare stars of the solar neighborhood as reported in the literature. We compare our findings with the number of bursts detected with the Arecibo radiotelescope between 1989 and 1993, using a very reliable method to discriminate between stellar and artificial emissions. We compare the rates of radio bursts per hour inferred from both this Arecibo campaign and the literature to rates of optical flares found in the literature. We also compare the nine stars to each other, and the Arecibo results to radio surveys of two open clusters.

keywords: stars: flare; late type; activity -- radio continum: stars -- methods: statistical

• 1. Introduction
• 2. Flaring activity established from previous
  publications
• 3. Activity revealed by the observations of 1989-1993 in Arecibo
• 4. Comparison between our results and the publications
• 5. Conclusion
• Appendix 1 : Number of radio bursts detected from the nine studied dMe flare stars
• References