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High Angular Resolution Stokes V Spectra in Penumbrae

Published online by Cambridge University Press:  12 April 2016

J. Sánchez Almeida ,
V. Martínez Pillet ,
J. Trujillo Bueno  and
B.W. Lites
J. Sánchez Almeida
Affiliation:
Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain
V. Martínez Pillet
Affiliation:
Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain
J. Trujillo Bueno
Affiliation:
Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain
B.W. Lites
Affiliation:
High Altitude Observatory, National Center for Atmospheric Research, Boulder, Colorado 80307–3000, USA

Abstract

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Stokes I and V profiles of Fel 630.1 nm and Fel 630.2 nm observed in a sunspot with an angular resolution ≥0.5” are analyzed. We find asymmetric V-profiles whose shapes are in agreement with previous determinations having lower angular resolution (~5”). We also find a correlation between penumbral small scale variations of continuum intensity and velocity. Although it involves smaller velocities, such correlation resembles that existing in the quiet sun as a consequence of convection.

Type
Session 3. Techniques of Magnetic Field Measurements
Information
International Astronomical Union Colloquium , Volume 141: The Magnetic and Velocity Fields of Solar Active Regions , 1993 , pp. 192 - 195
Copyright
Copyright © Astronomical Society of the Pacific 1993

References

Beckers, J.M., & Schröter, E.H. 1969, Solar Phys, 10, 384 Google Scholar
Degenhardt, D., Wiehr, E. 1991, Astr. Ap., 252, 821 Google Scholar
Lites, B.W., Scharmer, G.B., & Skumanich, A. 1990, Ap. J., 355, 329 CrossRefGoogle Scholar
Sánchez Almeida, J., & Lites B.W., 1992a, Ap. J., 398, in pressCrossRefGoogle Scholar
Sánchez Almeida, J., & Lites, B.W. 1992b, this proceedingsGoogle Scholar
Sánchez Almeida, J., Martinez Pillet, V. 1990, in Advances in Solar Polarimetry, ed. November, L., NSO/SP SW 11, p. 191 Google Scholar
Sánchez Almeida, J., Martinez Pillet, V., Wittmann, A.D. 1991, Solar Phys, 134, 1 Google Scholar
Title, A.M., Frank, Z.A., Shine, R.A., Tarbeil, T.D., Topka, K.P., Scharmer, G.B., & Schmidt, W. 1992, in Sunspots: Theory and Observations, eds. Thomas, J.H. & Weiss, N.O., Kluber, p. 195 Google Scholar
Wiehr, E., Stellmacher, G.: 1989, Astr. Ap., 225, 528 Google Scholar