The dynamical state of the atmosphere of the supergiant alpha Scorpii (M 1.5 Iab)

Details The dynamical state of the atmosphere of the supergiant alpha Scorpii (M 1.5 Iab) The dynamical state of the atmosphere of the supergiant alpha Scorpii (M 1.5 Iab)

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...200..146d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 200, no. 1-2, July 1988, p. 146-152.

Physics

16

Atmospheric Turbulence, Stellar Atmospheres, Stellar Physics, Supergiant Stars, Photosphere, Scorpius Constellation, Stellar Luminosity, Stellar Spectra, Turbulent Flow, Visible Spectrum

Scientific paper

The dynamical state of the atmosphere of α Sco A (M1.5 Iab) has been investigated on the basis of spectra in the visual spectral range. The authors find the ratio between the microturbulent velocity component and the velocity of sound to increase from 0.4 at τ5000 = 1 to 0.6 at τ5000 = 10-3. The turbulent acceleration gt is 0.15 cm s-2 which should be compared with ggrav = -1.0 cm s-2. Per scaleheight the fraction 0.95 of the mechanical energy flux is dissipated, a remarkably large value for the relatively small microturbulent velocity. The macroturbulent velocity component has the surprisingly large value of 16 km s-1.

Affiliated with

Also associated with

No associations

Rating

The dynamical state of the atmosphere of the supergiant alpha Scorpii (M 1.5 Iab) 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 The dynamical state of the atmosphere of the supergiant alpha Scorpii (M 1.5 Iab), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The dynamical state of the atmosphere of the supergiant alpha Scorpii (M 1.5 Iab) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1421829