Chromospheric Flows in the Vicinity of Magnetic Features in the Quiet Sun Observed with Hinode SOT

Details Chromospheric Flows in the Vicinity of Magnetic Features in the Quiet Sun Observed with Hinode SOT Chromospheric Flows in the Vicinity of Magnetic Features in the Quiet Sun Observed with Hinode SOT

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsp41b..02t&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SP41B-02

Physics

7507 Chromosphere, 7524 Magnetic Fields, 7529 Photosphere

Scientific paper

The Narrowband Filter Imager of the Solar Optical Telescope on Hinode can measure Doppler shifts and line-of- sight magnetic fields in two lines with contributions from the low chromosphere: Na D 589.6 nm and Mg b 517.3 nm. The SOT Spectro-Polarimeter also measures very accurate vector magnetic fields and Doppler velocities in the photosphere. These observations have diffraction-limited spatial resolution and superb stability. We present examples of these measurements in quiet sun at various disk positions. In addition to the expected granulation and f- and p-modes, conspicuous longer-lived downflows are seen near strong network flux elements. Transient upflows are also detected, presumably the base of flows seen in spicules at the limb and H-alpha mottles on the disk. Velocity features associated with emerging and cancelling magnetic features are also described. The observations are compared with synthesized images made from line profiles computed from the University of Oslo 3-D MHD simulations. This work was supported by NASA contract NNM07AA01C. The Hinode mission is operated by ISAS/JAXA, NAOJ, NASA, STFC, ESA and NSC.

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