HR: 0830h
AN: SP11A-05    [Abstracts]
TI: Moving Magnetic Features Inside the Penumbra of NOAO 10008
AU: * Luszcz, S H
EM: shl35@cornell.edu
AF: Cornell University Department of Astronomy, 610 Space Sciences Building, Cornell University, Ithaca, NY 14853
AU: Penn, M J
EM: mpenn@noao.edu
AF: National Solar Observatory, 950 N Cherry Av, Tucson, AZ 85719
AU: Jaeggli, S A
EM: jaeggli@noao.edu
AF: University of Arizona, Department of Astronomy, 933 N Cherry Av, Tucson, AZ 85721-0065
AU: Henney, C J
EM: chenney@noao.edu
AF: National Solar Observatory, 950 N Cherry Av, Tucson, AZ 85719
AB: Over 30 years of observations and theories comprise the study of moving magnetic features (MMFs). MMFs, which often occur in opposite polarity pairs, migrate radially outward through the sunspot moat at speeds of about 1 km~s^-1. A sequence of sixteen scans of the active region NOAO 10008 were taken using the NSO-CSUN IR camera at the NSO McMath-Pierce Solar Telescope on 24 June 2002 17:38-21:59. Using the Fe I absorption line at 1564.8nm, magnetogram images and maps of the magnetic field vector were produced, revealing magnetic features within the penumbra that appear to move radially outward at similar velocities and azimuth angles as those of MMFs in the moat. We use polar time slice images to measure the radial velocities of both types of features. This work is carried out through the National Solar Observatory Research Experiences for Undergraduate (REU) site program, which is co-funded by the Department of Defense in partnership with the National Science Foundation REU Program.
DE: 7524 Magnetic fields
DE: 7529 Photosphere
SC: Solar Physics Division - AAS [SP]
MN: 2005 Joint Assembly