Abstract Details
| Name: Ajanta Datta Affiliation: HKBK College of Engineering, Bangalore./IIA B Conference ID: ASI2015_497 Title : High Frequency Dynamics of Braided Coronal Magnetic Structures as seen from Hi-c Authors and Co-Authors : V.Pant, Indian Institute of Astrphysics, Bangalore. D. Banerjee, Indian Institute of Astrphysics, Bangalore. Abstract Type : Poster Abstract Category : Sun and the Solar System Abstract : The understanding of the heating mechanism/s of the solar corona is one of the main challenges in solar physics. Two types of mechanisms are well accepted, namely impulsive heating by nanoflares and wave heating by dissipation of waves. High frequency waves may play a significant role in coronal heating. In spite of early prediction of existence of high frequency intensity oscillations, unavailability of observation with high time resolution hindered their detection. The recent Hi-C rocket experiment has unprecedented spatial resolution (3-4") and a cadence of 5.5s. These observations have revealed many new features of the corona. Cirtain et.al. have shown the first evidences of magnetic field braiding and axial twist from Hi-c Observation. In this paper we have studied high frequency dynamics of braided coronal structure. We have shown enhanced intricate coronal structures, using some processing techniques involving Fourier power map, which are not visible even with the high quality image from Hi-C. Propagating disturbances of periodicities 30 sec to 70 sec are detected near the braided region. The disturbances are of longitudinal and transverse in nature. The bursty nature of these disturbances might be the evidence of multiple reconnection in that region. |