SP-596 November 2005

Proceedings of the

International Scientific Conference on Chromospheric and Coronal Magnetic Fields

30 August – 2 September 2005 Katlenburg-Lindau, Germany SCIENTIFIC ORGANISING COMMITTEE

Sami K. Solanki (Chair) Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany Bernhard Fleck ESA Research and Scientific Support Department, Goddard, USA Sarah Gibson HAO/NCAR, Boulder, USA Franz Kneer Universitäts-Sternwarte, Göttingen, Germany Tetsuya Magara NRL, Washington DC, USA Valery Nakariakov University of Warwick, UK Eric Priest St Andrews University, UK Takashi Sakurai NAO, Tokyo, Japan Javier Trujillo Bueno Instituto de Astrofisica de Canarias, Tenerife, Spain Stephen White University of Maryland, USA

LOCAL ORGANISING COMMITTEE (Max-Planck-Institut für Sonnensystemforschung)

Davina Innes Andreas Lagg Jörg Büchner Bernd Inhester Eckart Marsch Manfred Schüssler

Publication: Proceedings of the International Scientific Conference on Chromospheric and Coronal Magnetic Fields

30 August – 2 September 2005, Katlenburg-Lindau, Germany (ESA SP-596, November 2005)

Editors: D.E. Innes, A. Lagg & S.K. Solanki Max-Planck-Institut für Sonnensystemforschung

D. Danesy ESA Publications Division

Published and distributed by: ESA Publications Division ESTEC, Postbus 299 2200 AG Noordwijk The Netherlands

Printed in: The Netherlands Price: E 50 ISBN: 92-9092-907-3 ISSN: 1609-042X

Copyright: © 2005 European Space Agency SP-596 Table of Contents

PREFACE Session 1

Chromospheric and Coronal Magnetic Fields I Chair: S. Solanki HEATING THE SOLAR X-RAY CORONA E.N. Parker

ON THE TOMOGRAPHY RECONSTRUCTION OF THE CORONAL MAGNETIC FIELD FROM CORONAL HANLE/ZEEMAN OBSERVATIONS M.I. Kramar & B. Inhester Chromospheric and Coronal Magnetic Fields II Chair: B. Fleck

MEASUREMENT METHODS FOR CHROMOSPHERIC AND CORONAL MAGNETIC FIELDS N.-E. Raouafi

THE SCIENTIFIC CASE FOR QUANTUM SPECTROPOLARIMETRY FROM SPACE J. Trujillo Bueno, E. Landi Degl’Innocenti, R. Casini & V. Martínez Pillet

UV POLARIMETRY OF THE SECOND SOLAR SPECTRUM A. Gandorfer

Chromospheric and Coronal Magnetic Fields III Chair: F. Kneer

RESULTS FROM CHROMOSPHERIC MAGNETIC FIELD MEASUREMENTS A. Lagg

MAGNETIC LOOPS: A COMPARISON OF EXTRAPOLATIONS FROM THE PHOTOSPHERE WITH CHROMOSPHERIC MEASUREMENTS T. Wiegelmann, A. Lagg, S. Solanki, B. Inhester & J.Woch

THE VERTICAL COMPONENT OF ELECTRIC CURRENT DENSITIES IN SUNSPOTS H. Balthasar

LINE FORMATION IN INHOMOGENEOUS ATMOSPHERES AND THE MAGNETIC STRUCTURE OF THE INTERNETWORK T.A. Carroll & J. Staude

Chromospheric and Coronal Magnetic Fields IV Chair: M. Carlsson

RADIO MEASUREMENTS OF CORONAL MAGNETIC FIELDS S.M. White

MAGNETIC FIELDS AND INTENSITY CHANGES IN CORONAL DIMMING REGIONS G.D.R. Attrill, N. Narukage, K. Shibata & L.K. Harra

MAGNETIC FIELD EXTRAPOLATION T. Neukirch

DESCRIBING CORONAL MAGNETIC FIELDS BY SUCCESSIVE FORCE-FREE EQUILIBIA S. Régnier & R.C. Canfield

CORONAL HEATING THROUGH BRAIDING OF MAGNETIC FIELD LINES SYNTHESIZED CORONAL EUV EMISSION AND MAGNETIC STRUCTURE H. Peter, B.V. Gudiksen & A. Nordlund Session 2

Coupling to the Photosphere I Chair: M. Schüssler

SMALL SCALE MAGNETIC ELEMENTS AS BRIGHT POINTS IN THE BLUE Hα WING J. Leenaarts, P. Sütterlin, R.J. Rutten, M. Carlsson & H. Uitenbroek

SIMULATIONS OF MAGNETOHYDRODYNAMICS AND CO FORMATION FROM THE CONVECTION ZONE TO THE CHROMOSPHERE S. Wedemeyer-Böhm, W. Schaffenberger, O. Steiner, M. Steffen, B. Freytag & I. Kamp

MAGNETIC NETWORK AND CANOPY M. Zhang

Coupling to the Photosphere II Chair: J. Trujillo Bueno

DETERMINATION OF THE MAGNETIC FIELD VECTOR IN A POLAR CROWN PROMINENCE VIA THE HANLE AND ZEEMAN EFFECTS IN THE HE I 10830 Å MULTIPLET. L. Merenda, J. Trujillo Bueno, E. Landi Degl’Innocenti & M. Collados

OBSERVATIONAL EVIDENCE OF PHOTOSHPERIC MAGNETIC DIPS IN FILAMENT CHANNELS B. Schmieder, A. López Ariste & G. Aulanier

Coupling to the Photosphere III Chair: S. Antiochos

THE SIZE OF SMALL-SCALE SOLAR MAGNETIC REGIONS E.Wiehr & K.G. Puschmann

MAGNETIC FIELDS MEASURED IN SPICULES. A. López Ariste & R. Casini

MAGNETIC TOPOLOGIES: WHERE WILL RECONNECTION OCCUR ? P. Démoulin

ON SOLAR CORONAL HEATING BY FORCED MAGNETIC RECONNECTION R. Jain, P. Browning & K. Kusano

Coupling to the Photosphere IV Chair: T. Magara

FORMATION AND DYNAMICS OF CURRENT SHEETS H. Isobe

MHD SHOCK WAVE STRUCTURE IN SUPERSONIC MAGNETIC RECONNECTION T. Shimizu, K. Kondo & M. Ugai

THE EMERGENCE AND EVOLUTION OF TWISTED MAGNETIC FLUX ROPES IN THE SOLAR CORONA Y. Fan, S.E. Gibson & W. Manchester

MAGNETIC FLUX EMERGENCE AND ITS INTERACTION WITH AN EXISTING CORONAL FIELD K. Galsgaard, F. Moreno-Insertis, V. Archontis & A. Hood Session 3

Magnetic Structures I Chair: S. White

TIME-DEPENDENT RESPONSE OF THE LARGE-SCALE SOLAR CORONA J.A. Linker, R. Lionello, Z. Mikic, & P. Riley

QUANTITATIVE LINK BETWEEN SOLAR EJECTA AND INTERPLANETARY MAGNETIC CLOUDS: MAGNETIC HELICITY C.H. Mandrini, S. Dasso, M.L. Luoni, S. Pohjolainen, P. Démoulin & L. van Driel-Gesztelyi

SIMULATION STUDY ON THE SELF-ORGANIZATION OF SIGMOIDAL STRUCTURE AND THE ONSET OF SOLAR FLARES K. Kusano, S. Inoue, T. Yamamoto, T. Yokoyama & T. Sakurai

Session 4

Magnetic Instabilities I Chair: E. Priest

NUMERICAL SIMULATIONS OF 3D MAGNETIC RECONNECTION DUE TO ROTATIONAL DRIVING I. De Moortel & K. Galsgaard

Magnetic Instabilities II Chair: P. Démoulin

SMALL-SCALE MAGNETIC ACTIVITY C.J. Schrijver

A COMPARISON BETWEEN SPICULES IN Hα AND CIV A. de Wijn, B. De Pontieu & R. Erdélyi

OBSERVATION OF SMALL SCALE RECONNECTION ROLE IN UNDULATED FLUX TUBE EMERGENCE E. Pariat, G. Aulanier, B. Schmieder, M.K. Georgoulis, D.M. Rust & P.N. Bernasconi

PHYSICALLY CONSISTENT SIMULATION OF CHROMOSPHERIC AND CORONAL MAGNETIC FIELDS J. Büchner & B. Nikutowski

Magnetic Instabilities III Chair: A. van Ballegooijen

DOWNFLOWS ALONG AN OFF-LIMB LOOP SEEN BOTH IN 30.4NM AND Hα A. De Groof, D.A.N. Müller & S. Poedts

A MULTI-WAVELENGTH VIEW ON CORONAL RAIN D.A.N. Müller, A. De Groof, B. De Pontieu & V.H. Hansteen

TRANSVERSE WAVES IN A POST-FLARE SUPRA-ARCADE E. Verwichte, V.M. Nakariakov & F.C. Cooper Session 5

Chromospheric and Coronal Seismology I Chair: E. Marsch

CHROMOSPHERIC WAVES M. Carlsson & V. Hansteen

SIMULATIONS OF MAGNETO- ACOUSTIC WAVES IN SUNSPOTS E.V. Khomenko & M. Collados

DETECTION OF WAVES IN THE EQUATORIAL CORONAL HOLES D. Banerjee, E. O’Shea & J.G. Doyle

OSCILLATIONS AND WAVES IN CORONAL LOOPS T. Wang

Chromospheric and Coronal Seismology II Chair: V. Nakariakov

IMPULSIVE GENERATION OF VERTICAL OSCILLATIONS OF A SOLAR CORONAL ARCADE LOOP M. Selwa, K. Murawski, S.K. Solanki, T.J.Wang, & U. Shumlak

DYNAMICS OF CORONAL LOOP OSCILLATIONS T. Van Doorsselaere, I. Arregui, J. Andries, M. Goossens & S. Poedts

FIRST RESULTS FROM SECIS OBSERVATIONS OF THE 2001 TOTAL SOLAR ECLIPSE A.C. Katsiyannis, D.R.Williams, F. Murtagh, R.T.J. McAteer & F.P. Keenan

X-RAY QUASI-PERIODIC PULSATIONS IN SOLAR FLARES AS MAGNETOHYDRODYNAMIC OSCILLATIONS C. Foullon, E. Verwichte, V.M. Nakariakov & L. Fletcher

Summary

CHROMOSPHERIC AND CORONAL MAGNETIC FIELDS E. Priest Poster Session

DISCONTINUITIES IN THE SOLAR WIND FROM MULTISPACE OBSERVATIONS A. Asadchy, A. Skalsky, G. Zastenker, N. Shevyrev & M. Ryasantseva

SUPERSONIC DOWNFLOWS IN THE SOLAR CHROMOSPHERE ARE VERY COMMON R. Aznar Cuadrado, S.K. Solanki & A. Lagg

STUDY OF ASYMMETRIES OF STOKES PROFILES FROM HIGH SPATIAL RESOLUTION SPECTROPOLARIMETRY N. Bello González, O. Okunev & F. Kneer

CHROMOSPHERIC AND CORONAL SIGNATURES OF MAGNETIC FLUX CANCELLATION IN A SUNSPOT’S MOAT C. Beck, L.R. Bellot Rubio & S. Nagata

STUDY OF POLAR FACULAE J. Blanco Rodríguez, B. Sánchez-Andrade Nuño, K.G. Puschmann & F. Kneer

PHYSICAL PARAMETERS OF DARK MOTTLES IN Hα Z. Funda Bostanci

3D MAGNETO-CONVECTION AND FLUX EMERGENCE IN THE PHOTOSPHERE M. Cheung, M. Schüssler & F. Moreno-Insertis

MAGNETIC FLUX EMERGENCE AND ITS INTERACTION WITH AN EXISTING CORONAL FIELD K. Galsgaard, F. Moreno-Insertis, V. Archontis & A. Hood

ANALYSIS OF DYNAMICS OF LOOPS IN AN ACTIVE REGION ASSOCIATED WITH A SMALL C- CLASS FLARE P. Gömöry, J. Rybák, A. Kucera & H. Wöhl

FULL-STOKES POLARIMETRY OF THE CHROMOSPHERE IN THE Hα LINE Y. Hanaoka

ON THE ELECTRON AND ION ACCELERATION DURING THE FLARE ON 28.10.2003 I.V. Oreshina & B.V. Somov

PHOTOSPHERIC AND CHROMOSPHERIC MAGNETIC STRUCTURE OF A SUNSPOT D. Orozco Suarez, A. Lagg & S.K. Solanki

HOW STRONG IS THE DEPENDENCE OF THE SOLAR CHROMOSPHERE UPON THE CONVECTION ZONE? W. Rammacher

EVOLUTION OF THE MAGNETIC ENERGY BUDGET IN AR 10486 FROM POTENTIAL AND NONLINEAR FORCE-FREE MODELS S. Régnier, B. Fleck, V. Abramenko & H.-Q. Zhang

ANALYSIS OF A WIDE CHROMOSPHERIC ACTIVE REGION B. Sánchez-Andrade Nuño, K.G. Puschmann, M. Sánchez Cuberes, J. Blanco Rodríguez & F. Kneer

PLASMA FLOW VELOCITIES INFERRED FROM PHOTOSPHERIC MAGNETIC FIELD OBSERVATIONS - A COMPARISON J.C. Santos, J. Büchner, M.V. Alves, B. Nikutowski & H. Zhang

INFLUENCE OF THE PASCHEN-BACK EFFECT ON THE STOKES PROFILES OF THE HE 10830 Å TRIPLET C. Sasso, A. Lagg & S.K. Solanki MAGNETOHYDRODYNAMIC SIMULATION FROM THE CONVECTION ZONE TO THE CHROMOSPHERE W. Schaffenberger, S. Wedemeyer-Böhm, O. Steiner & B. Freytag

THE STRUCTURE OF THE LOWER TRANSITION REGION AS INFERRED FROM THE HYDROGEN LYMAN-α LINE RADIANCE L. Teriaca, U. Schühle, S.K. Solanki, W. Curdt & E. Marsch

ANALYSIS OF POLARIMETRIC SUNSPOT DATA FROM TESOS/VTT/TENERIFE L. Valdivielso Casas, N. Bello González, K.G. Puschmann, B. Sánchez-Andrade Nuño & F. Kneer

SOME FRACTAL PROPERTIES OF SOLAR MAGNETIC FIELDS B. Ioshpa, E. Mogilevskii, V. Obridko & E. Rudenchik

ON THE SCALING OF MAGNETIC FIELD STRENGTH WITH LOOP LENGTH IN SOLAR ACTIVE REGIONS C.H. Mandrini & R. Jain

SWAP: AN EUV IMAGER FOR SOLAR MONITORING ON BOARD OF PROBA2 A.C. Katsiyannis, D. Berghmans, B. Nicula, J.-M. Defise, G. Lawrence, J.-H. Lecat, J.-F. Hochedez & V. Slemzin

MAGNETIC STRUCTURES ON THE SUN: OSBERVATIONS WITH THE NEW “GÖTTINGEN” TWO- DIMENSIONAL SPECTROMETER ON TENERIFE

F. Kneer , K.G. Puschmann , J. Blanco Rodríguez, B. Sánchez-Andrade Nuño & A.D. Wittmann

THREE DIMENSIONAL ANALYSIS OF SHOCK STRUCTURE AROUND MAGNETIC LOOP ASSOCIATED WITH SPONTANEOUS FAST MAGNETIC RECONNECTION K. Kondoh, M. Ugai & T. Shimizu

SPICULES AND BLINKERS AS SEEN IN SHUTTERLESS EIT 304 Å M.S. Madjarska, J.G. Doyle, J.F. Hochedez & A. Theissen

A MECHANISM FOR THE EMERGENCE OF MAGNETIC U-LOOPS AND FLUX CANCELLATION ON THE SUN T. Magara, S.K. Antiochos, C.R. DeVore, & M.G. Linton

OBSERVED WAVE PROPAGATION ALONG THE SUNSPOT MAGNETIC FIELD THROUGH THE CHROMOSPHERE, TRANSITION REGION AND CORONA M.S. Marsh & R.W.Walsh

INFLUENCE OF INSTRUMENTAL EFFECTS ON HIGH FREQUENCY OSCILLATIONS OBSERVED WITH TRACE K. Muglach & H. Balthasar

INVESTIGATION OF A COLOUR-COLOUR METHOD TO DETERMINE SOLAR ATMOSPHERIC TEMPERATURES USING SOHO/EIT DATA J.B. Noglik, R.W. Walsh & J. Ireland

THE GENERAL PROPERTIES OF 23TH SOLAR CYCLE N. Oklay

GRANULAR AND INTERGRANULAR OSCILLATIONS FROM THE OBSERVATIONS OF BA II RESONANCE LINE V.L. Olshevsky

NON-LINEAR FORCE-FREE MAGNETIC FIELDS T. Wiegelmann THE SOLAR OPTICAL TELESCOPE ONBOARD THE SOLAR-B: CAPABILITY OF THE MAGNETIC FIELD DIAGNOSTIC K. Ichimoto & SOT Team

SPECTROPOLARIMETRIC OBSERVATIONS OF PROMINENCES AND SPICULES, AND MAGNETIC FIELD DIAGNOSTICS R. Ramelli, M. Bianda, J. Trujillo Bueno, L. Merenda & J.O. Stenflo

List of Participants

Photo Gallery

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