Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...494..715m&link_type=abstract
Astrophysical Journal v.494, p.715
Astronomy and Astrophysics
Astronomy
34
Stars: Circumstellar Matter, Stars: Early-Type, Stars: Emission-Line, Be
Scientific paper
We have determined the kinetic temperature of the electron gas as a function of position in the circumstellar envelopes of early Be stars for the model developed by Poeckert & Marlborough. The rates of energy gain and loss due to photoionization, radiative recombination, collisional transitions between bound levels, free-free emission, and free-free absorption were calculated at a set of grid points in a meridional plane. If the temperature assumed is correct, the ratio of energy gain to energy loss should be exactly 1 at all points in the envelope. Our investigation demonstrates that the choice of a constant temperature of 20,000 K was a reasonable first-order approximation. More importantly, we have also determined the temperature that corresponds to equal rates of energy gain and loss at each grid point throughout the envelope. These temperatures represent a self-consistent solution of the equation of energy conservation.
Marlborough J. M.
Millar C. E.
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