Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...344l..29b&link_type=abstract
Astronomy and Astrophysics, v.344, p.L29-L32 (1999)
Astronomy and Astrophysics
Astrophysics
6
Sun: Photosphere, Sun: Granulation, Techniques: Image Processing
Scientific paper
The first high spectral resolution and white-light images obtained at the THEMIS telescope with the Italian Panoramic Monochromator (IPM), are analyzed to study intensity and velocity fluctuations in the photosphere of the sun. Monochromatic images, in two spectral ranges around 538.03 nm (C I line) and 557.61 nm (Fe I line), are used to characterize the vertical structure of the photosphere. Granulation cells and granules are obtained by segmentation of white-light images using suitable finding algorithms. We observe the height dependence of velocity vs. intensity fluctuations, and we found a dependence of velocity and intensity on granule dimension. Our results show that granules increase their intensity with dimension in the lower solar photosphere. In the higher photosphere, on the contrary, the intensity decreases with the dimension. Based on THEMIS/CNRS-INSU/CNR telescope observations
Bavassano Bruno
Berrilli Francesco
Briand Carine
Bruno Roberto
Caccin Bruno
No associations
LandOfFree
Dependence of the photospheric vertical flow characteristics on the granule dimension 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 Dependence of the photospheric vertical flow characteristics on the granule dimension, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dependence of the photospheric vertical flow characteristics on the granule dimension will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1428410