Other
Scientific paper
Nov 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pasp..113.1378g&link_type=abstract
The Publications of the Astronomical Society of the Pacific, Volume 113, Issue 789, pp. 1378-1385.
Other
13
Stars: Atmospheres, Stars: Late-Type, Stars: Variables: Other, Stars: Supergiants
Scientific paper
Spectroscopic observations of the M supergiant star Betelgeuse were taken at the Elginfield Observatory over 17 months in the 1999-2000 observing seasons in order to search for giant convection cells. Although the photospheric spectral lines show some temporal variations, mainly in their depths (consistent with a previously study), the Doppler shift distribution inferred from them is remarkably stable. The spectral lines show characteristic macroturbulence dispersion ~15 km s-1 and cover a full span of +/-50-60 km s-1. The widths of the lines show occasional as well as longer term changes of a few percent but no evidence for giant convection cells. These spectroscopic observations are more consistent with a classical picture of nonthermal photospheric velocities in which large numbers of convection cells appear on the stellar disk at all times.
No associations
LandOfFree
Betelgeuse: Giant Convection Cells 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 Betelgeuse: Giant Convection Cells, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Betelgeuse: Giant Convection Cells will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1565922