The Living with a Red Dwarf Program: Understanding the Magnetic Evolution of dM Stars and Their Suitability to Host Life-Bearing Planets

Details The Living with a Red Dwarf Program: Understanding the Magnetic Evolution of dM Stars and Their Suitability to Host Life-Bearing Planets The Living with a Red Dwarf Program: Understanding the Magnetic Evolution of dM Stars and Their Suitability to Host Life-Bearing Planets

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542412e&link_type=abstract

American Astronomical Society, AAS Meeting #215, #424.12; Bulletin of the American Astronomical Society, Vol. 42, p.332

Astronomy and Astrophysics

Astronomy

Scientific paper

We report on our continued efforts to better understand and delineate the magnetic dynamo-induced behaviors (e.g. rotation, coronal-chromospheric XUV activity) of red dwarfs (dM stars) over their Main Sequence lifetimes, as part of the "Living with a Red Dwarf” Program - http://astronomy.villanova.edu/LWARD . The ability to accurately estimate the age of a red dwarf is of critical importance and, due to their long nuclear lifetimes (> 50 Gyr), it can best be done through observations of the aforementioned "magnetic tracers.” The Living with a Red Dwarf Program's database of dM stars with photometrically determined rotation rates (from starspot modulations) continues to expand, as does the inventory of archival XUV observations. When combined with cluster/population memberships and kinematics, the determination of Age-Activity-Rotation relationships is possible. Such relationships have broad impacts on not only the studies of Magnetic Dynamo Theory and Angular Momentum Loss on low-mass stars with deep convective zones, but also the suitability of planets around red dwarfs to sustain life. The relationships will also permit the age of a field red dwarf to be determined through measures of either its rotation period or XUV activity level.

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