Real-Time Frame Selector and its Application to Observations of the Horizontal Velocity Field in the Solar Photosphere

Details Real-Time Frame Selector and its Application to Observations of the Horizontal Velocity Field in the Solar Photosphere Real-Time Frame Selector and its Application to Observations of the Horizontal Velocity Field in the Solar Photosphere

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997pasj...49..513k&link_type=abstract

Publications of the Astronomical Society of Japan, v.49, p.513-522.

Astronomy and Astrophysics

Astronomy

11

Sun: Atmospheric Motions, Sun: Mesogranulation, Sun: Photosphere, Sun: Sunspots, Sun: Supergranulation

Scientific paper

A real-time frame selector (RTFS), a new observational system, was developed at the Domeless Solar Telescope of Hida Observatory, Kyoto University. Our RTFS allows us to automatically select out a video frame with the highest spatial resolution in a series of live video images during a prescribed time span, and stores the selected one in digital format to a hard disk file. We applied the RTFS to observations of solar granulation in the G-band wavelength (lambda 4308 { Angstroms}, passband 20 { Angstroms}) and obtained a time series of data with a step of 15 seconds. By the method of local-correlation tracking, we derived the horizontal velocity field with the granulation pattern as tracers. In a quiet photosphere, we found the so-called mesogranulation flow field, clearly. Supergranular flow patterns were also detected and identified from a comparison with an Hα wing image. On the other hand, in a sunspot area, we found new evidence of horizontal inflow from penumbral areas to umbral areas as well as the presence of another circumferential inflow from the surrounding photosphere to the penumbral outer edge.

Affiliated with

Also associated with

No associations

Rating

Real-Time Frame Selector and its Application to Observations of the Horizontal 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 Real-Time Frame Selector and its Application to Observations of the Horizontal Velocity Field in the Solar Photosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Real-Time Frame Selector and its Application to Observations of the Horizontal Velocity Field in the Solar Photosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-807635