Coronal loop seismology using multiple transverse loop oscillation harmonics

Details Coronal loop seismology using multiple transverse loop oscillation harmonics Coronal loop seismology using multiple transverse loop oscillation harmonics

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007a%26a...473..959v&link_type=abstract

Astronomy and Astrophysics, Volume 473, Issue 3, October III 2007, pp.959-966

Astronomy and Astrophysics

Astrophysics

52

Sun: Corona, Sun: Magnetic Fields, Sun: Oscillations, Sun: Uv Radiation

Scientific paper

Context: TRACE observations (23/11/1998 06:35:57-06:48:43 UT) in the 171 Å bandpass of an active region are studied. Coronal loop oscillations are observed after a violent disruption of the equilibrium. Aims: The oscillation properties are studied to give seismological estimates of physical quantities, such as the density scale height. Methods: A loop segment is traced during the oscillation, and the resulting time series is analysed for periodicities. Results: In the loop segment displacement, two periods are found: 435.6 ± 4.5~s and 242.7 ± 6.4~s, consistent with the periods of the fundamental and 2nd harmonic fast kink oscillation. The small uncertainties allow us to estimate the density scale height in the loop to be 109~Mm, which is about double the estimated hydrostatical value of 50~Mm. Because a loop segment is traced, the amplitude dependence along the loop is found for each of these oscillations. The obtained spatial information is used as a seismological tool to give details about the geometry of the observed loop.

Affiliated with

Also associated with

No associations

Rating

Coronal loop seismology using multiple transverse loop oscillation harmonics 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 Coronal loop seismology using multiple transverse loop oscillation harmonics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coronal loop seismology using multiple transverse loop oscillation harmonics will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-823229