The Sun-as-a-star As Seen By Hinode XRT

Details The Sun-as-a-star As Seen By Hinode XRT The Sun-as-a-star As Seen By Hinode XRT

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.9424s&link_type=abstract

American Astronomical Society Meeting 210, #94.24; Bulletin of the American Astronomical Society, Vol. 39, p.221

Astronomy and Astrophysics

Astronomy

Scientific paper

We study full disk images of the Sun taken in multiple filters with the Hinode XRT during the current low state of the solar cycle (late 2006). Taking advantage of the wide temperature sensitivity of the XRT, we construct spatially averaged emission measure (EM) curves for each of several solar region types, including coronal holes, quiet Sun, bright points, and active regions of various description.
These are used to determine the relative contribution of the various features to the total solar EM, as a starting point for a program to investigate their time variation. We also explore use of the average EM curves for understanding spatially unresolved stellar spectra and their correlation with underlying magnetic fields.
The US XRT team is supported by a contract from NASA to SAO. Hinode is an international project supported by JAXA, NASA, PPARC and ESA.
We are grateful to the Hinode team for all their efforts in the design, development and operation of the mission.

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