On the prevalence of small-scale twist in the solar chromosphere and transition region-Reference-Cited by-同舟云学术

On the prevalence of small-scale twist in the solar chromosphere and transition region

Published:2014-10-17 Issue:6207 Volume:346 Page:
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

De Pontieu B.¹²,Rouppe van der Voort L.²,McIntosh S. W.³,Pereira T. M. D.²,Carlsson M.²,Hansteen V.²,Skogsrud H.²,Lemen J.¹,Title A.¹,Boerner P.¹,Hurlburt N.¹,Tarbell T. D.¹,Wuelser J. P.¹,De Luca E. E.⁴,Golub L.⁴,McKillop S.⁴,Reeves K.⁴,Saar S.⁴,Testa P.⁴,Tian H.⁴,Kankelborg C.⁵,Jaeggli S.⁵,Kleint L.⁶,Martinez-Sykora J.⁶

Affiliation:

1. Lockheed Martin Solar and Astrophysics Laboratory (LMSAL), 3251 Hanover Street, Organization A021S, Building 252, Palo Alto, CA 94304, USA.

2. Institute of Theoretical Astrophysics, University of Oslo, Post Office Box 1029, Blindern, N-0315 Oslo, Norway.

3. High Altitude Observatory, National Center for Atmospheric Research, Post Office Box 3000, Boulder, CO 80307, USA.

4. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA.

5. Department of Physics, Montana State University, Bozeman, Post Office Box 173840, Bozeman, MT 59717, USA.

6. Bay Area Environmental Research Institute, 596 1st Street West, Sonoma, CA 95476, USA.

Abstract

The solar chromosphere and transition region (TR) form an interface between the Sun’s surface and its hot outer atmosphere. There, most of the nonthermal energy that powers the solar atmosphere is transformed into heat, although the detailed mechanism remains elusive. High-resolution (0.33–arc second) observations with NASA’s Interface Region Imaging Spectrograph (IRIS) reveal a chromosphere and TR that are replete with twist or torsional motions on sub–arc second scales, occurring in active regions, quiet Sun regions, and coronal holes alike. We coordinated observations with the Swedish 1-meter Solar Telescope (SST) to quantify these twisting motions and their association with rapid heating to at least TR temperatures. This view of the interface region provides insight into what heats the low solar atmosphere.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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