Differential rotation, magnetic activity and X-ray emission of late type giants

Details Differential rotation, magnetic activity and X-ray emission of late type giants Differential rotation, magnetic activity and X-ray emission of late type giants

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...105..133b&link_type=abstract

Astronomy and Astrophysics, vol. 105, no. 1, Jan. 1982, p. 133-139.

Astronomy and Astrophysics

Astrophysics

14

Dynamo Theory, Giant Stars, Late Stars, Stellar Magnetic Fields, Stellar Rotation, X Rays, Convection, Emission Spectra, Solar Flux, Stellar Luminosity, Stellar Models, Thermal Energy

Scientific paper

The observations of X-ray emission from late type main sequence and giant stars show that a coronal heating due to acoustic waves is unlikely.
As suggested by Vaiana and Rosner, the conversion of magnetic into thermal energy may be responsible for the X-ray emission from such a kind of stars.
The proposed ingredients in our analysis are the differential rotation and dynamo action which are able to generate a magnetic activity at the star's surface which in turn gives rise to the observed X-ray emission. We assume that the interaction of rotation with convection, in stars possessing outer convective envelopes, is the dominant mechanism for generating differential rotation and dynamo action, and that the stressing of the coronal magnetic flux tubes by the surface turbulence, converting magnetic into thermal energy, determine the level of X-ray emission.
Therefore we compute a series of models of luminosity class III giant stars, and determine the surface X-ray flux.
Comparing these results with those concerning the late type main sequence star models, previously computed by the same authors, and with observations, it appears that the proposed mechanism is plausible.

Affiliated with

Also associated with

No associations

Rating

Differential rotation, magnetic activity and X-ray emission of late type giants 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 Differential rotation, magnetic activity and X-ray emission of late type giants, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential rotation, magnetic activity and X-ray emission of late type giants will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1455004