Abstract Details

Name: Sanchita Pal
Affiliation: CESSI, IISER Kolkata
Conference ID: ASI2017_1239
Title : On the relationship of the CME velocity and the magnetic parameters of its source active region
Authors and Co-Authors : Dibyendu Nandy (Center of Excellence in Space Sciences India, IISER Kolkata) Nandita Srivastava ( Udaipur Solar Observatory, Physical Research Laboratory)
Abstract Type : Poster
Abstract Category : Sun and the Solar System
Abstract : The speed of a coronal mass ejection (CME) is one of the important measures of its geo-effectivity. Here we estimate the de-projected speed of the fastest and the slowest CMEs that an active region (AR) produces. Using the horizontal and vertical magnetic field components of the AR's vector magnetogram, we calculate seven AR integrated magnetic parameters (magnetic flux, area, and five different non-potential parameters) and examine the relationship of the CME speed with those magnetic parameters. Our analysis suggests that one of the non-potential parameters, i.e. the proxy of the AR free magnetic energy can determine the upper and the lower limits of the de-projected CME speed better than any of the other AR measures, considered here.