High-resolution proper motions in a sunspot penumbra

Details High-resolution proper motions in a sunspot penumbra High-resolution proper motions in a sunspot penumbra

2005-10-07

arxiv.org/abs/astro-ph/0510220v1

Astrophys.J.638:553-563,2006

Astronomy and Astrophysics

Astrophysics

To appear in ApJ. 11 pages with 9 figures. Movie at http://www.iac.es/proyect/solarhr/pencork.html

Scientific paper

10.1086/498668

Local correlation tracking techniques are used to measure proper motions in a series of high angular resolution (~0.1 arcsec) penumbra images. If these motions trace true plasma motions, then we have detected converging flows that arrange the plasma in long narrow filaments co-spatial with dark penumbral filaments. Assuming that these flows are stationary, the vertical stratification of the atmosphere and the conservation of mass suggest downflows in the filaments of the order of 200 m/s. The association between downflows and dark features may be a sign of convection, as it happens with the non-magnetic granulation. Insufficient spatial resolution may explain why the estimated vertical velocities are not fast enough to supply the radiative losses of penumbrae.

Affiliated with

Also associated with

No associations

Rating

High-resolution proper motions in a sunspot penumbra does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with High-resolution proper motions in a sunspot penumbra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-resolution proper motions in a sunspot penumbra will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-560778