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

Published online by Cambridge University Press:  05 July 2012

Hebe Cremades ,
Cristina H. Mandrini  and
Sergio Dasso
Hebe Cremades
Affiliation:
UTN - Facultad Regional Mendoza/CONICETRodríguez 243, Ciudad, Mendoza M5502AJE, Argentina email: [email protected]
Cristina H. Mandrini
Affiliation:
Instituto de Astronomía y Física del Espacio (CONICET-UBA) and FCEN (UBA), CC. 67 Suc. 28, 1428, Buenos Aires, Argentina
Sergio Dasso
Affiliation:
Instituto de Astronomía y Física del Espacio (CONICET-UBA) and FCEN-UBA, CC. 67 Suc. 28, 1428, Buenos Aires, Argentina
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Abstract

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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 uninterrupted gathering of solar coronal data since the beginning of the SOHO era offers the exceptional possibility of comparing two solar minima for the first time, with regard to coronal transients. This study characterizes the variety of outward-travelling transients observed in the solar corona during 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, and ground-based observatories were studied for coronal ejecta and their solar sources, while in situ data registered by the ACE spacecraft were inspected for interplanetary CMEs and magnetic clouds. Instrumental aspects such as dissimilar resolution, cadence, and fields of view are considered in order to discern instrumentally-driven disparities from inherent differences between solar minima.

Keywords

Sun: coronaSun: coronal mass ejections (CMEs)Sun: activitysolar wind
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S286: Comparative Magnetic Minima: Characterizing quiet times in the Sun and Stars , October 2011 , pp. 149 - 153
Copyright
Copyright © International Astronomical Union 2012

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