Plasma Outflows in the Corona as Observed With Hinode XRT

Details Plasma Outflows in the Corona as Observed With Hinode XRT Plasma Outflows in the Corona as Observed With Hinode XRT

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh41b1624s&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SH41B-1624

Astronomy and Astrophysics

Astrophysics

7500 Solar Physics, Astrophysics, And Astronomy, 7509 Corona, 7511 Coronal Holes, 7554 X-Rays, Gamma Rays, And Neutrinos

Scientific paper

We present imaging observations of plasma outflows in the solar corona made with X-Ray Telescope (XRT) aboard Hinode satellite. The XRT employs a back-illuminated CCD as the focal-plane imaging device which enables us, together with an optimized set of analysis filters, to investigate, for the first time, dynamic behavior of relatively cool (1-2 MK, say) plasmas in the corona. The XRT revealed a clear pattern of continuous outflow of plasmas from the edge of an active region NOAA AR 10942 right adjacent to a coronal hole. Plasmas of temperature ~1 MK flowed out with a sub-sonic velocity of typically ~140 km/s along magnetic field lines that are most likely open towards the interplanetary space. These outflowing plasmas may constitute a fraction of the (slow) solar wind. In addition to this discovery, the XRT has so far identified rich patterns of continuous outflows including those from coronal hole boundaries and along fan-like field lines rooted inside coronal holes. XRT observations of such plasma outflows in the corona are presented and their possible implications to the solar wind discussed.

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