HERSCHEL Sounding Rocket Mission Observations of the Helium Corona

Details HERSCHEL Sounding Rocket Mission Observations of the Helium Corona HERSCHEL Sounding Rocket Mission Observations of the Helium Corona

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21640721n&link_type=abstract

American Astronomical Society, AAS Meeting #216, #407.21

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The HERSCHEL (Helium Resonant Scattering in the Corona and Heliosphere) investigation successfully obtained unprecedented images of the helium and hydrogen components of the solar corona out to 3 solar radii during a suborbital flight on 14 September 2009. Preliminary analysis of these observations indicates the spatial distribution of the helium abundance and outflow velocity provides powerful diagnostics for the source and dynamics of the slow solar wind during the time of solar minimum activity. An analysis of co-temporal STEREO EUVI data to derive the temperature of low coronal structures associated with the regions of enhanced helium abundance observed by HERSCHEL provides evidence the relative first ionization potential (FIP) of helium and hydrogen may play an important role in the observed abundance distribution.
NRL was supported by the Office of Naval Research and NASA under NDPRS6598G.

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