Evershed clouds as precursors of moving magnetic features around sunspots

Details Evershed clouds as precursors of moving magnetic features around sunspots Evershed clouds as precursors of moving magnetic features around sunspots

2006-09-05

arxiv.org/abs/astro-ph/0609108v1

Astrophys.J.649:L41-L44,2006

Astronomy and Astrophysics

Astrophysics

To appear in ApJ Letters, Vol 649, 2006 September 20 issue

Scientific paper

10.1086/508260

The relation between the Evershed flow and moving magnetic features (MMFs) is studied using high-cadence, simultaneous spectropolarimetric measurements of a sunspot in visible (630.2 nm) and near-infrared (1565 nm) lines. Doppler velocities, magnetograms, and total linear polarization maps are calculated from the observed Stokes profiles. We follow the temporal evolution of two Evershed clouds that move radially outward along the same penumbral filament. Eventually, the clouds cross the visible border of the spot and enter the moat region, where they become MMFs. The flux patch farther from the sunspot has the same polarity of the spot, while the MMF closer to it has opposite polarity and exhibits abnormal circular polarization profiles. Our results provide strong evidence that at least some MMFs are the continuation of the penumbral Evershed flow into the moat. This, in turn, suggests that MMFs are magnetically connected to sunspots.

Affiliated with

Also associated with

No associations

Rating

Evershed clouds as precursors of moving magnetic features around sunspots 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 Evershed clouds as precursors of moving magnetic features around sunspots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evershed clouds as precursors of moving magnetic features around sunspots will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-554193