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Research Interests

Solar magnetohydrodynamics (MHD): theoretical study of MHD wave propagation in stratified atmospheres, theoretical modelling. Observations of Chromospheric and Coronal oscillations, density and temperature diagnostic in solar atmosphere. Providing observational constraints for Solar wind and Space weather. Magneto-seismology. Space weather forecasting. Studies of small scale and large scale transients. Multi-wavelength study using ground and space based instruments. Imaging and spectroscopic instrumentation. Study of the long term variation of sun using Kodaikanal and other digitized archive. Space climate.

Eclipse Related Experience

  • Participated in the eclipse expedition to Easter Island, Chile. Performed multi-slit spectroscopy of the corona during total solar eclipse, 11th July, 2010
  • Participated in the eclipse expedition to China (Anji). Performed spectroscopic and imaging experiments during total solar eclipse, 22nd July, 2009
  • Participated in the eclipse expedition in the Irish sea (from the Irish ferry) to photograph the solar corona during total solar eclipse, 11th August, 1999.
  • Participated in an Air-borne Experiment (from Indian Air force AN-32 air-craft) to photograph the solar corona during total solar eclipse, 24th October, 1995.

Teaching

 

Joint Astronomy Programme (JAP): Fluids and Plasmas    2006, 2009
Integrated Phd Program (Physics): Electrodynamics    2008
Integrated M.Tech (PhD) program: Stellar structure and evolution    2008
Summer projects: Introductory lectures on Sun    2005, 2006, 2007, 2008

Education

Doctor of Philosophy (1990-1996)
  • Thesis Title: Magnetohydrodynamic phenomena in the solar atmosphere.
  • Advisors: Professor S. S. Hasan
  • Indian Institute of Astrophysics , Bangalore,India
Masters Degree(1988-1989)
  • Theoretical Physics, University of Calcutta,India
Bachelors Degree(1984-1987)
  • Physics (major), Chemistry and Mathematics. St. Xaviers College, Calcutta, India
School
  • Ballygunge Govt. High School, Calcutta,India

Referring

In the Panel of Referees for

  • Nature Astronomy
  • Science
  • Astrophysical Journal (ApJ)
  • Astronomy and Astrophysics (A&A)
  • Solar Physics
  • Current Science
  • Bulletin of Astronomical Society of India
  • New Astronomy
  • Research in Astronomy and Astrophysics (RAA)

Professional Experience

Indian Institute of Space Science and Technology
  • Director October 2024 - Present date
Aryabhatta Research Institute of Observational Sciences, India
  • Director December 2019 - October 2024
Indian Institute of Astrophysics, Bangalore, India
  • Senior Professor July 2021 - Present date
  • Professor January 2016 - June 2021
  • Associate Professor October 2010 - December 2015
  • Reader April 2007 - September 2010
  • Scientist C June 2004 - March 2007
Center of Excellence in Space Sciences, IISER ,Kolkata
  • Adjunct Faculty 2002 - Present date
National Astronomical Observatories of China, Beijing, China
  • Visiting fellow of the Chinese Academy of Sciences April 2015 - May 2015
Centre for Plasma Astrophysics, K.U. Leuven, Belgium
  • Visiting professor: Capita Selecta lecturer March 2013 - May 2013
  • Senior Fellow of the research Council February 2012 - May 2012
  • Postdoctoral Fellow March 2002 - March 2004
Fellowship granted by the (F.W.O.) or Fund for Scientific Research - Flanders (Belgium). Project title: 'Solar drivers of space weather'.
  • Postdoctoral Fellow March 2000 - February 2002
Two year fellowship granted by the research council of the Katholic University of Leuven, worked at the Centre for Plasma Astrophysics, Belgium. Continuing on the SOHO project.
Armagh Observatory, Armagh, United Kingdom
  • Postdoctoral Fellow September 1997 - February 2000
Particle Physics and Astronomy Research Council (PPARC) fellowship of the United Kingdom, worked at Armagh Observatory, studying the dynamics of solar atmosphere using data from the SOHO satellite (The Solar and Heliospheric Observatory), a NASA/ESA project. Data analysis and theoretical modelling.
Indian Institute of Astrophysics, Bangalore, India
  • Research Assistant December 1996 - September 1997
Indo-US project between Indian Institute of Astrophysics and Harvard Smithsonian Institute (between submission of PhD thesis and defence).
Belur Vidyamandir, Ramakrishna Mission Degree College, Calcutta, India
  • Teaching Assistant October 1989 - July 1990

Computer Programming and Applications

Introduction to Linux – introduction to programming – basic elements of a program, variables, values, types, assignment – expressions and control flow – iteration and loop design, arrays, for loop, functions, parameters, recursion – object-oriented paradigm, objects, classes, inheritance, reusability, polymorphism, overloading, libraries, containers, classes for file handling, parameter passing and pointers, linking, shell commands

Basic Engineering Lab

Study of general purpose hand tools in workshopAssembly and disassembly practices of the following modelsGear box assemblyCentrifugal pump assembly along with shaft alignment practiceCam and follower mechanismsTransducer (sensor) trainerExperiments on different basic machinesTurning exercise–straight turning, taper turning, thread cutting practiceMilling exercise –spur gear cutting practiceWelding practice –arc weldingFitting practice– models with marking and drilling exercisesElectrical Wiring PracticeSoldering Practice

Physics Lab

Damped driven oscillatorWaves and oscillationModulus of elasticitySurface tensionMoment of inertia and angular accelerationFaraday’s law of inductionBiot-Savarts lawRatio of electronic charge to massBrewster’s angle and Malu's lawEarth’s magnetic fieldCharge of an electron

Communication Skills

Functional English: conversation skills – asking questions, requests, doubts, engage in conversation – different types of communication - verbal and non-verbal, body language.Teaching Grammar: grammar games, exercises.Teaching Vocabulary: language games, exercises.Reading and appreciating stories, poems, essays – listening and appreciating video lectures – comprehensive questions and answers.Lab: Presentation skills – appreciation of videos, songs – role plays – debates – extemporizes – group presentations – introduction to technical writing – technical writing, how to write minutes, reports,
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