Dynamical Properties of Photospheric Flux Tubes at the Footpoints of Hot and Cool Coronal Loops

Details Dynamical Properties of Photospheric Flux Tubes at the Footpoints of Hot and Cool Coronal Loops Dynamical Properties of Photospheric Flux Tubes at the Footpoints of Hot and Cool Coronal Loops

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apj...638..539n&link_type=abstract

The Astrophysical Journal, Volume 638, Issue 1, pp. 539-552.

Astronomy and Astrophysics

Astronomy

2

Sun: Corona, Sun: Magnetic Fields

Scientific paper

The dynamical properties of photospheric flux tubes at the footpoints of hot (T>2 MK) and cool (T=1-2 MK) coronal loops in active region plages are investigated by analyzing the Stokes V profile parameters of Fe I λ6302. We show that the footpoints of both hot and cool loops are located at the periphery of small magnetic concentrations, such as pores and azimuth centers, having a field strength of 1-1.8 kG and a spatial size of 2"-5". The footpoints of cool loops seem to be associated with more densely packed and higher field strength pores and azimuth centers than those of hot loops. Enhanced Stokes V asymmetries, redshifted zero-crossing velocities, and small magnetic filling factors are found at the footpoints of both types of loops, as compared with outside the footpoints. However, the largest asymmetries and more redshifted zero-crossing velocities are observed at the footpoints of hot loops, where the filling factor is smaller than at the footpoints of cool loops. The differences between the profiles emerging from the footpoints of hot and cool coronal loops suggest that heating of the coronal loops could be related to the dynamical properties of photospheric flux tubes.

Affiliated with

Also associated with

No associations

Rating

Dynamical Properties of Photospheric Flux Tubes at the Footpoints of Hot and Cool Coronal Loops 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 Dynamical Properties of Photospheric Flux Tubes at the Footpoints of Hot and Cool Coronal Loops, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical Properties of Photospheric Flux Tubes at the Footpoints of Hot and Cool Coronal Loops will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1766638