Mass loss from P Cygni - The evidence of the Balmer lines

Details Mass loss from P Cygni - The evidence of the Balmer lines Mass loss from P Cygni - The evidence of the Balmer lines

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...221..186v&link_type=abstract

Astrophysical Journal, Part 1, vol. 221, Apr. 1, 1978, p. 186-192.

Astronomy and Astrophysics

Astrophysics

40

Balmer Series, Radiative Transfer, Stellar Mass Ejection, Stellar Models, Stellar Spectra, Emission Spectra, H Lines, Line Spectra

Scientific paper

Envelopes of stars which are losing mass are divided into two groups according to their velocity distribution. 'Rapid accelerators' are driven to nearly terminal velocity near the photosphere and then coast outward at nearly constant speed. 'Gradual accelerators' experience a steady increase in velocity over a sizable fraction of the envelope. The Balmer-line profiles from P Cygni are shown to be consistent with the latter class of envelope model. Very good agreement between theory and observation is shown by a model with v(r) proportional to r throughout and with a mass-loss rate of 3 hundred-thousandths solar mass per year. A model in which the envelope decelerates is not required to account for the Balmer spectrum. This brings into accord the various indicators of envelope velocity: the line-width-excitation-energy correlation, the Balmer progression, and the free-free continuum.

Affiliated with

Also associated with

No associations

Rating

Mass loss from P Cygni - The evidence of the Balmer lines 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 Mass loss from P Cygni - The evidence of the Balmer lines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mass loss from P Cygni - The evidence of the Balmer lines will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1379129