Emerging Flux and the Heating of Coronal Loops

Details Emerging Flux and the Heating of Coronal Loops Emerging Flux and the Heating of Coronal Loops

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...601..530s&link_type=abstract

The Astrophysical Journal, Volume 601, Issue 1, pp. 530-545.

Astronomy and Astrophysics

Astronomy

35

Sun: Activity, Sun: Chromosphere, Sun: Corona, Sun: Magnetic Fields, Sun: Photosphere, Sun: Transition Region

Scientific paper

We use data collected by a multiwavelength campaign of observations to describe how the fragmented, asymmetric emergence of magnetic flux in NOAA active region 8844 triggers the dynamics in the active-region atmosphere. Observations of various instruments on board Yohkoh, SOHO, and TRACE complement high-resolution observations of the balloon-borne Flare Genesis Experiment obtained on 2000 January 25. We find that coronal loops appeared and evolved rapidly ~6+/-2 hr after the first detection of emerging magnetic flux. In the low chromosphere, flux emergence resulted in intense Ellerman bomb activity. Besides the chromosphere, we find that Ellerman bombs may also heat the transition region, which showed ``moss'' ~100% brighter in areas with Ellerman bombs as compared to areas without Ellerman bombs. In the corona, we find a spatiotemporal anticorrelation between the soft X-ray (SXT) and the extreme ultraviolet (TRACE) loops. First, SXT loops preceded the appearance of the TRACE loops by 30-40 minutes. Second, the TRACE and SXT loops had different shapes and different footpoints. Third, the SXT loops were longer and higher than the TRACE loops. We conclude that the TRACE and the SXT loops were formed independently. TRACE loops were mainly heated at their footpoints, while SXT loops brightened in response to coronal magnetic reconnection. In summary, we observed a variety of coupled activity, from the photosphere to the active-region corona. Links between different aspects of this activity lead to a unified picture of the evolution and the energy release in the active region.

Affiliated with

Also associated with

No associations

Rating

Emerging Flux and the Heating of 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 Emerging Flux and the Heating of Coronal Loops, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Emerging Flux and the Heating of Coronal Loops will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1839674