Other
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aj....135.1450g&link_type=abstract
The Astronomical Journal, Volume 135, Issue 4, pp. 1450-1458 (2008).
Other
21
Convection, Stars: Individual: Betelgeuse, Stars: Oscillations, Stars: Variables: Other, Supergiants, Techniques: Spectroscopic
Scientific paper
Spectroscopic observations of Betelgeuse, taken at the Elginfield Observatory, show velocity and temperature variations delineating the systematic, but generally chaotic, rise and fall of photospheric material. The characteristic timescale of the variations is 400 days, while velocities cover a range of ~9 km s-1. Macroturbulence is constant to about 13% and does not result from motions on the largest scales, but from motions within the large structures. The line bisectors have predominantly a reversed-C shape. Variations in the shapes of bisectors occur on the 1 km s-1 level and are not obviously connected to their shifts in wavelength. A likely explanation of the observations is granulation and giant convection cells accompanied by short-lived oscillations they trigger. Random convection events may account for radial-velocity jitter seen in many highly evolved stars.
No associations
LandOfFree
Mass Motions in the Photosphere of Betelgeuse 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 Motions in the Photosphere of Betelgeuse, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mass Motions in the Photosphere of Betelgeuse will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1421720