Coronal and Transition-Region Structure in the RS Canum Venaticorum Binaries V711 Tauri, AR Lacertae, and II Pegasi. II. Energy-Balance Models

Details Coronal and Transition-Region Structure in the RS Canum Venaticorum Binaries V711 Tauri, AR Lacertae, and II Pegasi. II. Energy-Balance Models Coronal and Transition-Region Structure in the RS Canum Venaticorum Binaries V711 Tauri, AR Lacertae, and II Pegasi. II. Energy-Balance Models

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...518..873g&link_type=abstract

The Astrophysical Journal, Volume 518, Issue 2, pp. 873-889.

Other

11

Stars: Binaries: Close, Stars: Coronae, Stars: Late-Type, Stars: Magnetic Fields, Stars: Variables: Other (Rs Canum Venaticorum)

Scientific paper

Models for the upper transition regions and coronae of the RS CVn binaries V711 Tau, AR Lac, and II Peg are presented. Empirical emission-measure distributions discussed in an associated paper are compared with those from theoretical models that assume an energy balance between optically thin radiative losses and conductive heating. The inadequacies of spherically symmetric, gravitationally bound models are highlighted, and this study focuses instead on energy-balance solutions in magnetic-loop geometries. The loop models reproduce the observed emission-measure distributions and electron densities using two families of structures. The hotter loops have peak temperatures of logT_e~7.35 and heights of ~0.05 R_*, whereas the cooler loops have peak temperatures of logT_e~6.9 and heights of ~0.15 R_*. The area coverage of the loops is consistent with photospheric spot patterns determined from photometry and Doppler imaging techniques, and the magnetic field strengths required to heat these loops agree with measured values. The ratio of conductive and radiative fluxes in the loop models are close to the value for a stable minimum energy-loss solution. Possible variations in the stellar Fe abundance, and their implications for the loop models, are also discussed.

Affiliated with

Also associated with

No associations

Rating

Coronal and Transition-Region Structure in the RS Canum Venaticorum Binaries V711 Tauri, AR Lacertae, and II Pegasi. II. Energy-Balance Models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Coronal and Transition-Region Structure in the RS Canum Venaticorum Binaries V711 Tauri, AR Lacertae, and II Pegasi. II. Energy-Balance Models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coronal and Transition-Region Structure in the RS Canum Venaticorum Binaries V711 Tauri, AR Lacertae, and II Pegasi. II. Energy-Balance Models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1497889