Dual Flows with Supersonic Velocities in the Sunspot Transition Region

Details Dual Flows with Supersonic Velocities in the Sunspot Transition Region Dual Flows with Supersonic Velocities in the Sunspot Transition Region

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...612.1193b&link_type=abstract

The Astrophysical Journal, Volume 612, Issue 2, pp. 1193-1195.

Astronomy and Astrophysics

Astronomy

4

Sun: Transition Region, Sun: Uv Radiation, Sun: Sunspots

Scientific paper

Observations of sunspot transition region lines that deviate significantly from a Gaussian shape are presented. Attention is given to ``dual flows,'' a line profile phenomenon in which two distinct velocities are observed within the same spatial resolution element. In 5 out of 12 sunspots we observe dual flows. Several emission line profiles are well represented by two Gaussian line components, one with a subsonic and one with a supersonic line-of-sight velocity.

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