Physics
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.176..287d&link_type=abstract
In ESA 3rd European IUE Conf. p 287-290 (SEE N83-11889 02-88)
Physics
4
B Stars, Stellar Atmospheres, Stellar Mass, Velocity Distribution, H Alpha Line, Iue, Planetary Nebulae, Stellar Coronas, Stellar Envelopes
Scientific paper
Observations of 59 Cyg show the strongest displacements of the far UV superionized lines at epochs of minimum H alpha emission. Phases of strongest mass flux, measured in the chromospheric coronal regions, do not coincide with phases of largest mass content in the overlying cool H alpha envelope. Velocities in the chromosphere-corona range up to 1500 km/sec; those in the H alpha and Fe II emission envelope, and absorption shell, do not exceed 1 to 200 km/sec. The density in the postcoronal regions is not fixed by a monotonically-outward accelerated flow; strong deceleration and cooling of the mass-flow within a few radii are required. The Be stars have the same atmospheric pattern as planetary nebulae but the decelerated cool regions occur within a few radii as contrasted to the 1 million or more radii for normal planetary nebulae.
Doazan Vera
Thomas Nicholas R.
No associations
LandOfFree
Empirical atmospheric velocity patterns from combined IUE and visual observations: The Be stars 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 Empirical atmospheric velocity patterns from combined IUE and visual observations: The Be stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Empirical atmospheric velocity patterns from combined IUE and visual observations: The Be stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1353456