Photometric Analysis of the Sunspot Umbral Dots - Part Two - Size Shape and Temperature

Details Photometric Analysis of the Sunspot Umbral Dots - Part Two - Size Shape and Temperature Photometric Analysis of the Sunspot Umbral Dots - Part Two - Size Shape and Temperature

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....99..111k&link_type=abstract

Astronomy and Astrophysics, Vol. 99, P. 111, 1981

Astronomy and Astrophysics

Astrophysics

32

Scientific paper

We use several selected very high resolution pictures obtained at 4680 Å and 6000 Å at the prime focus of the Sacramento Peak Vacuum Telescope to study the sizes, shape, and typical brightness temperatures of the umbral bright dots observed well inside the core of a unipolar sunspot. A two-dimensional photometric analysis was performed. Results are consistent with the picture of a core composed of a cool background atmosphere at a constant level with many extremely bright embedded dots. The average diameter of dots is 190 km and their brightness temperature, 6185 °K. Sizes of dots as well as their rounded shape are approximately constant whatever the values of cos θ are; conversely, their intensities show a decrease with increasingly center limb distances.

Affiliated with

Also associated with

No associations

Rating

Photometric Analysis of the Sunspot Umbral Dots - Part Two - Size Shape and Temperature 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 Photometric Analysis of the Sunspot Umbral Dots - Part Two - Size Shape and Temperature, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photometric Analysis of the Sunspot Umbral Dots - Part Two - Size Shape and Temperature will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-990781