The small-scale velocity field in the solar photosphere

Details The small-scale velocity field in the solar photosphere The small-scale velocity field in the solar photosphere

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...243..251k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 243, no. 1, March 1991, p. 251-262. DFG-supported research.

Astronomy and Astrophysics

Astrophysics

28

Energy Transfer, Photosphere, Solar Atmosphere, Solar Limb, Line Spectra, Power Spectra, Richardson Number, Scaling Laws, Velocity Distribution

Scientific paper

The center-to-limb variation of velocity fluctuations derived from several spectral lines is presented and, from these data, the height dependence of the vertical and horizontal components of the small-scale velocity field is deduced. A strong decrease in the lower photosphere and a flat gradient in the upper photosphere are observed for both the horizontal and vertical velocity. It is concluded that the convective motions decay in the middle photosphere up to a height of about 170 km and so-called secondary motions dominate the upper layers of the photosphere. A stability criterion is used to interpret this conversion of motions and, by utilizing the Richardson number and several length scales, it is shown that the stable stratification of the photosphere causes the decay of the granular convective motions.

Affiliated with

Also associated with

No associations

Rating

The small-scale velocity field in the solar photosphere 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 small-scale velocity field in the solar photosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The small-scale velocity field in the solar photosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1601473