Coronal transients during two solar minima: their source regions and interplanetary counterparts

CREMADES, H.; MANDRINI, C. H.; DASSO, S.

Comparative Magnetic Minima: characterizing quiet times in the Sun and stars

Cambridge University Press

Año: 2012; p. 149 - 153

We have investigated two full solar rotations belonging to two distinct solar minima,in the frame of two coordinated observational and research campaigns. The nearly uninterruptedgathering of solar coronal data since the beginning of the SOHO era offers the exceptional possibilityof comparing two solar minima for the first time, with regard to coronal transients. Thisstudy characterizes the variety of outward-travelling transients observed in the solar coronaduring both time intervals, from very narrow jet-like events to coronal mass ejections (CMEs).Their solar source regions and ensuing interplanetary structures were identified and characterized.Multi-wavelength images from the space missions SOHO, Yohkoh and STEREO, andground-based observatories were studied for coronal ejecta and their solar sources, while in situdata registered by the ACE spacecraft were inspected for interplanetary CMEs and magneticclouds. Instrumental aspects such as dissimilar resolution, cadence, and fields of view are consideredin order to discern instrumentally-driven disparities from inherent differences betweensolar minima.