Abstract Details
| Name: Akshay Suresh Affiliation: IISER Pune Conference ID: ASI2016_494 Title : Statistical analysis of weak solar bursts seen with the Murchison Widefield Array Authors and Co-Authors : Akshay S. (1), Rohit Sharma (2), Srijan B. Das (3), Divya Oberoi (2) and Victor Pankratius (4) 1 - IISER Pune, India 2 - NCRA-TIFR, Pune, India 3 - IISER Kolkata, India 4 - MIT Haystack Observatory, MA, USA Abstract Type : Poster Abstract Category : Sun and the Solar System Abstract : Numerous short-lived low, narrowband weak radio solar bursts have been identified in data from the Murchison Widefield Array (MWA), even during quite solar conditions. These emission features must come from non-thermal processes and their appearance in the dynamic spectra is unlike that of the well-established classes of radio bursts. We have been investigating the possibility of these emission features being electromagnetic signatures of the so called "nanoflares" hypothesised as a solution to the coronal heating problem. Given the large data volumes and rates of occurrence of these features, an automated approach is essential for their characterisation. Here we use wavelet decomposition approach to develop a technique to quantify the nature of these emission features and apply it to MWA data. This work builds on earlier work by the members of this collaboration to achieve a reliable flux calibration in a computationally efficient manner, and also allows us to characterise the slow variations in the solar thermal background emission. |