Determining Absorption and Emissivity Reduction Coefficients inside Solar Active Regions.

Details Determining Absorption and Emissivity Reduction Coefficients inside Solar Active Regions. Determining Absorption and Emissivity Reduction Coefficients inside Solar Active Regions.

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.0712i&link_type=abstract

American Astronomical Society, SPD meeting #40, #7.12; Bulletin of the American Astronomical Society, Vol. 41, p.814

Astronomy and Astrophysics

Astronomy

Scientific paper

The power of solar acoustic waves is reduced inside magnetic regions mainly due to absorption, emissivity reduction and local suppression. These coefficients were recently determined for one acoustic wave travel distance with the use of direction and phase-velocity filters. The purpose of this work is to determine all three parameters, absorption, emissivity reduction and local suppression, with a new method that does not include direction and phase-velocity filters. This method utilizes many active regions from SOHO / MDI observations to increase the signal-to-noise ratio. For each active region, we compute cross-covariances of outgoing and ingoing waves as well as double-skip waves that have the reflection located inside the active region. The exactly same procedures are applied to the quiet sun to obtain cross-covariances as references. The wide range of acoustic modes that are used in the absence of any filtering enables the determination of the above parameters as functions of the travel distance from the center of the magnetic region.

Affiliated with

Also associated with

No associations

Rating

Determining Absorption and Emissivity Reduction Coefficients inside Solar Active Regions. 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 Determining Absorption and Emissivity Reduction Coefficients inside Solar Active Regions., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determining Absorption and Emissivity Reduction Coefficients inside Solar Active Regions. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1111968