Observations of an Extended Near-Sun Neutral Helium Cloud

Details Observations of an Extended Near-Sun Neutral Helium Cloud Observations of an Extended Near-Sun Neutral Helium Cloud

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010eguga..12.8160m&link_type=abstract

EGU General Assembly 2010, held 2-7 May, 2010 in Vienna, Austria, p.8160

Physics

Scientific paper

We report on sensitive spectropolarimetric observations from the SOLARC coronagraph on Haleakala, Hawai'i. Using our infrared imaging spectropolarimeter, we have detected an extended diffuse surface brightness flux at the 1083 nm wavelength of neutral helium (He I). This has the polarization signature of light scattered by an extended He I cloud in the vicinity of the Sun. Our detailed analysis suggests that this signal originates from an inner source of neutral helium in the solar corona. In this paper, we will present details about these unique observations, their analysis, and physical interpretation.

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