INVESTIGADORES
MANDRINI Cristina Hemilse
artículos
Título:
The Global Context of Solar Activity During the Whole Heliosphere Interval Campaign
Autor/es:
WEBB, D.F.; CREMADES, H.; STERLING, A.C.; MANDRINI, C.H.; DASSO, S.; GIBSON, S.E.; HABER, D.A.; KOMM, R.W.; PETRIE, G.J.D.; MCINTOSH, P.S.; WELSCH, B.T.; PLUNKETT, S.P.
Revista:
SOLAR PHYSICS
Editorial:
SPRINGER
Referencias:
Lugar: Berlín; Año: 2011 vol. 274 p. 57 - 86
ISSN:
0038-0938
Resumen:
The Whole Heliosphere Interval (WHI) was an international observing and
modeling effort to characterize the 3-D interconnected
heliophysical system during this solar minimum, centered
on Carrington Rotation 2068, March 20 - April 16, 2008. During the
latter half of the WHI period, the Sun presented a sunspot-free, deep
solar minimum type face. But during the first half of CR 2068 three
solar active regions flanked by two opposite-polarity, low-latitude
coronal holes were present. These departures from the quiet Sun led to
both eruptive activity and solar wind structure. Most of the eruptive
activity, i.e., flares, filament eruptions and coronal mass ejections
(CMEs), occurred during this first, active half of the interval. We
determined the source locations of the CMEs and the type of associated
region, such as active region, or quiet sun or active region prominence.
To analyze the evolution of the events in the context of the global
solar magnetic field and its evolution during the three rotations
centered on CR 2068, we plotted the CME source locations onto synoptic
maps of the photospheric magnetic field, of the magnetic and
chromospheric structure, of the white light corona, and of
helioseismological subsurface flows. Most of the CME sources were
associated with the three dominant active regions on CR 2068,
particularly AR 10989. Most of the other sources on all three CRs appear
to have been associated with either isolated filaments or filaments in
the north polar crown filament channel. Although calculations of the
flux balance and helicity of the surface magnetic features did not
clearly identify a dominance of one region over the others,
helioseismological subsurface flows beneath these active regions did
reveal a pronounced difference among them. These preliminary results
suggest that the twistedness ( i.e., vorticity and
helicity) of subsurface flows and its temporal variation might be
related to the CME productivity of active regions, similar to the
relationship between flares and subsurface flows.
helicity) of subsurface flows and its temporal variation might be
related to the CME productivity of active regions, similar to the
relationship between flares and subsurface flows.
helicity) of subsurface flows and its temporal variation might be
related to the CME productivity of active regions, similar to the
relationship between flares and subsurface flows.