ASTRONOMICAL SOCIETY OF INDIA CONFERENCE SERIES
Volume 2
PROCEEDINGS OF THE FIRST ASIA-PACIFIC SOLAR PHYSICS MEETING
Indian Institute of Astrophysics Bengaluru, India March 21-24, 2011
Edited by:
Arnab Rai Choudhuri
Department of Physics, Indian Institute of Science Bengaluru, India
and
Dipankar Banerjee
Indian Institute of Astrophysics Bengaluru, India
ASTRONOMICAL SOCIETY OF INDIA CONFERENCE SERIES
Volume 2
Series Editor: D.J. Saikia
National Centrefor Radio Astrophysics, TlFR, Pune 411 007, India
Associate Editor: Annapurni Subramaniam Indian Institute of Astrophysics, Bengaluru 560 034, India
Editorial Board
H.M. Antia, Tata Institute of Fundamental Research, Colaba, Mumbai 400 005, India N.M. Ashok, Physical Research Laboratory, Ahmedabad 380 009, India
Matthew Bailes, Swinburne Centre for Astrophysics and Supercomputing, Hawthorn, Victoria 3122, Australia
Anil Bhardwaj, Vikram Sarabhai Space Centre, Trivandrum 695022, India
Sandip K. Chakrabarti, SNBase National Centre For Basic Sciences, Kolkata 700098, and Indian Centrefor Space Physics, Kolkata 700084, India
D.A. Green, Mullard Radio Astronomy Observatory, Cambridge, U'K.
Sunil K. Gupta, Tata Institute of Fundamental Research, Colaba, Mumbai 400 005, India Arun Mangalam, Indian Institute of Astrophysics, Bengaluru 560 034, India
T.R.Seshadri, University of Delhi, Delhi 110 007, India Harinder P. Singh, University of Delhi, Delhi 110007, India
R. Srianand, Inter-University Centrefor Astronomy and Astrophysics, Pune 411 007, India V.Trimble, University of California, Irvine, and Las Cumbres Observatory, USA
Editorial Staff
Sandra Rajiva, Indian Institute of Astrophysics, Bengaluru 560 034, India
ISBN: 978-81-922926-0-1
Publisher: DJ. Saikia, NCRA,TIFR forthe AstronomicalSociety ofIndia
©
2011by theAstronomical Society of India. AllRights Reserved ASI Conference Series - Volume 2, First EditionPrinted inIndiaby Vykat Prints Pvt.Ltd.,Q5, KSSIDC IndustrialArea,Veerasandra2nd Stage, Huskar Road, Benga\uru560099.
Contents
Preface... IX
Foreword Xl
Organizing Committees XIV
Participants xv
Conference Photograph XIX
I. Facilities and instruments for observing the Sun
Hinode "A new solar observatory in space" .. . . ... . . 1 Saku Tsuneta
I-meter near-infrared solar telescope Z. Liu and J. Xu
9
Optical observational programs at the Indian Institute of Astrophysics Jagdev Singh and B. Ravindra
Introduction to the Chinese Giant Solar Telescope y. y.Deng
19
31
National Large Solar Telescope of India S.S.Hasan
A dual Fabry-Perot based narrow band imager for the National Large. . .. .. 47
Solar Telescope .
B.Ravindra and Ravinder Kumar Banyal
37
Low frequency solar radio astronomy at the Indian Institute of Astrophysics 55
(HA) .
R. Ramesh
SoLEXS - A low energy X-ray spectrometer for solar coronal studies. . .. . . 63 K. Sankarasubramanian, M. C.Ramadevi, Monoj Bug,
C.N. Umapathy, S. Seetha, P. Sreekumar and Kumar
11. From the solar interior to the surface
Solar differential rotation: origin, models and implications for dynamo. ... . 71 L.L.Kitchatinov
Dynamics of active region flux tubes in the solar convection zone
Y.
Fan81
v
Dynamo models of the solar cycle: current trends and future prospects ... 91 Dibyendu Nandy
Helicity ofsolar active regions. . . . .... . .. ... . . ... . . . .. ... ... .... . 101 Hongqi Zhang
Parity of solar global magnetic field determined by turbulent
diffusivity 117
H.Hotta and T Yokoyama
Modeling the irregularities of solar cycle using flux transport dynamo
models... 123 Bidya Binay Karak
Back-reactions of dynamo-generated magnetic fields: torsional
oscillations and variations in meridional circulation 131 Amab Rai Choudhuri
Alpha effect due to magnetic buoyancy instability of a horizontal
magnetic layer 137
Piyali Chatterjee
Quenching of the alpha effect in the Sun - what observations are
telling us 143
R. H. Cameron
A physical reconstruction ofsolar magnetic field since 1700 1. liang and D. Schmitt
Hemispheric helicity sign rule and its solar cycle dependence M. Zhang, 1.Hao and C. Y. Wang
Solar cycle variation of network magnetic elements 1.X. Wang and C.L.lin
149
155
163
On the diagnostics of the quiet Sun's magnetic fields: application of the SIR inversion to the full-disk Stokes-meter observations
in 15 spectral lines 169
M. L.Demidov and H.Balthasar
Long-term variation of solar surface differential rotation. . . ... .. . .. 175 L.Zhang, K.Mursula, I. Usoskin, H. Wang and Z.Du
Sunspot seismology: accounting for magnetohydrodynamic wave
processes using imaging spectropolarimetry . . . ... 181 S.P. Rajaguru
Variations in p-mode parameters and sub-surface flows of active
regions with flare activity 189
R. A.Maurya and A.Ambastha
vi
A study of the north-south asymmetry ofsunspot area during
solar cycle 23 197
Partha Chowdhury and B. N.Dwivedi
Ill. The solar atmosphere and the corona
Modelling magnetic fields in the corona using nonlinear force-free
fields. . ... . . ... . . ... . . ... ... . . . .. . . .. . . .... . 203 M. S. Wheatland and K. D. Leka
The contraction of flare loops and its impact on the solar lower
atmosphere. . . ... . ... . . ... ... . ... . . ... . . . ... . . 213 Haisheng Ji
Alfven waves are easy: mode conversion in magnetic regions p.S. Cally
221
"ElT waves" and coronal mass ejections p.F. Chen and C.Fang
229
Coronal mass ejections and their heliospheric consequences N. Gopalswamy
241
A new view ofcoronal structures: implications for the source and
acceleration of the solar wind . . . ... . . ... . .. . ... . .. . . ... . . 259 S.R. Habbal, H.Morgan and M. Druckmuller
Transient induced MHD oscillations: a tool to probe the solar
active regions 271
Abhishek K. Srivastava, V.M. Nakariakov, B. N.Dwivedi and Pankaj Kumar
Chromospheric evaporation seen in hard X-rays Z. l. Ning
279
Differential coronal rotation and solar activity Satish Chandra and Hari Om Vats
285
Magnetic field configurations leading to solar eruptions Hui Li
291
Multi-wavelength diagnostics of precursor phase in solar flares .. . . .. 297 Arun K.Awasthi and Rajmal lain
Driving mechanism of a failed eruption 307
Y. Guo, M. D.Ding, B.Schmieder, H.Li, T.Torok and T. Wiegelmann
vii
On the triggering of M-class solar flare due toloop-loop interaction
in ARNOAA 10875 315
Pankaj Kumar; Abhishek K.Srivastava, B. V.Somov, P.K.Manoharan, R. Erdelyi and Wahab Uddin
Study of solar flares and filament interaction in NOAA 10501on
20 November, 2003 323
R.Chandra, B.Schmieder; C.H. Mandrini, P. Demoulin, E.Pariat, T.Toriik, G.Aulanier; W.Uddin and M. G.Linton
MHD simulations of quiescent prominence upflows in the
Kippenhahn-Schliiter prominence model .. . .. . . .. . . . .. ... 331 A. S.Hillier; H.Isobe, K.Shibata and T.E.Berger
SPECIAL SECTION
IV. Growth of solar physics in the Asia-pacific region
Introductory remarks . . . .. .. . ... ... ... ... ... . ... . . .. .. . . . ... . . ... . 339 Amab Rai Choudhuri
History and progress of solar research inChina 343
C. Fang
The early years ofsolar research in Japan E.Hiei
355
Solar physics in India: developments from the nineteenth century
to the present era 367
S.S.Hasan, Amab Rai Choudhuri and S.P. Rajaguru
Recent activities of solar astronomers in Korea 383
K.-S. Cho, 1.Chae, Y.1.Moon and G. S. Choe
Solar physics research in Taiwan. .. . ... . .... .. . . ... .. .. ... .. ... .. .. 393 c.-H. Lin and Dean-Yi Chou
Solar physics research in Australia 397
P.S. Cally, M. S. Wheatland, I.H. Cairns and D.B.Melrose
Ulugh Beg Astronomical Institute of Uzbek Academy of Sciences -
history and current status of solar physics research . . . ... . . 405 Sh. Ehgamberdiev and A. Serebryanskiy
Conference summary: Asia-Pacific region in the world and in astronomy. . . 411 T.Sakurai
Author Index ... .. . ... . . ... . . ... . . . .. .. ... . . .. . .. . ... ... . ... .. .. . 419
viii