The transition region structure of solar-like stars

Details The transition region structure of solar-like stars The transition region structure of solar-like stars

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.176..157f&link_type=abstract

In ESA 3rd European IUE Conf. p 157-159 (SEE N83-11889 02-88)

Physics

1

Boundary Layer Transition, Dwarf Stars, Late Stars, Stellar Atmospheres, Stellar Structure, Subgiant Stars, Conductive Heat Transfer, Electron Pressure, Emission Spectra, Line Spectra, Temperature Gradients, Ultraviolet Spectra

Scientific paper

Far UV emission lines of three late type stars, two dwarfs, and one subgiant were analyzed to determine the structure of their outer atmospheres. Emission line fluxes were used to find the emission measure distributions. A sample of transition region models was derived, using three boundary values of the electron pressure. The temperature gradients reach a maximum value at a temperature which depends only on the emission measure. The steep temperature gradient models give an impossible negative energy input at temperatures around 100,000 K. However, the radiation losses exceed the net conductive fluxes at low Te.

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