Research Seminar

Preliminary Scientific Programme

1st Day, 26 March 2014

Morning Session

Session I: Solar/Stellar Interior and Magnetism as well as Waves in the Sub-surface Layers

The sub-surface zones of the Sun and Sun-like stars are of great importance in terms of the generation of seed magnetic field, its transport through convection zone and thus creation of the surface magnetism. The interior plasma conditions also led to the excitation of various global wave modes tapping down the signature at the surface of Sun, and used to diagnose the physical conditions of the interior of Sun and similar stars. The session will be devoted for the discussion of recent development in the Helioseismology and Astereoseismology and possible joint ventures in this field of scientific research.

Speakers : H.M. Antia; A.R. Choudhuri; S. Hanasoge; D. Nandi

Afternoon Session

Session II: Waves in the Lower Solar Atmosphere

It is well known that the excitation of various MHD modes and their dissipation are important in the heating of the solar chromosphere as well as formation of the nascent solar wind. There are ubiquitous presence of the MHD waves in the complex magnetic structures as well as in the small-scale chromospheric flux-tubes using the recent ground and space-borne observations. The role of chromosphereare have been investigated in mass and energy transport to the upper coronal layers. The session will focus on the observations and modeling aspects of the chromospheric waves and their physical importance. The session will also discuss to understand the role of chromospheric heating in the context of existing (ROSA) and upcoming high-resolution (NLST) ground-based observing facilities and related possible collaborations.

Speakers : V. Fedun; D. Jess; S. Hasan

2nd Day, 27 March 2014

Morning Session

Session I : Waves in the Corona and MHD Seismology

The detection of coronal MHD modes in various magnetized structures (e.g., loops) are significant in the framework of the MHD seismology to determine the localised physical conditions. The space-borne (SDO, STEREO, Hinode recently) are devoting some of science goals to detect and utilize the coronal MHD waves in understanding their role in the coronal heating, acceleration of solar wind, and most significantly to pursue the coronal seismology. The session will be devoted to discuss the recent developments in the coronal wave detection, and in the study of their roles in corona. The session will also discuss the joint research cooperation in this area of solar research keeping in view the upcoming Indian (Aditya-I) and UK (IRIS) missions that will be able to explore the wave phenomena in the corona also.

Speakers : D. Banerjee; R. Erdélyi; A.K. Srivastava

Afternoon Session

Session II: Solar Eruptive Phenomena and Space Weather

The solar cycle 24 is progressing now. The solar eruptive phenomena (e.g., flares, CMEs, eruptive prominences) and their space weather consequences will be explored and discussed. The energy build-up and energy release mechanisms in the solar eruptive source regions will be discussed. The development in the origin and heliospheric implications of solar wind and turbulence will also be discussed. The special attention will be given to the ESA’s Solar Orbiter mission and it's SWA instruments in particular. The session will be important to discuss the scientific advancement in this field and also to discuss the joint venture if Indian and UK colleagues in the scenario of upcoming facilities, e.g., Aditya-I/Space Coronagraph; NLST; MAST; IRIS etc.

Speakers : P.K. Manoharan; C.J. Owens; P. Pagano; W. Uddin; P. Venkatakrishnan

3rd Day, 28 March 2014

Morning Session

Session I : Diagnostics, Heating, and Plasma Dynamics in the Solar Atmosphere

Constraining the plasma parameters, flow structure, non-thermal contributions through precise spectroscopic and imaging observations and measurements is always at the forefront of the solar research to gain the knowledge about localized heating, mass motions. The modern spectroscopic techniques will be discussed to constrain the solar plasma parameters. The study of flows and various types of the jets (coronal jets, spicules, anemone jets, tornadoes) at diverse spatio-temporal scales will be discussed in terms of their driving mechanisms, and roles in mass and energy transport. Heating scenario and active region dynamics and the recent advancement in this area of research will be explored.

Speakers : B.N. Dwivedi; R. Erdélyi; D. Tripathi; A.K. Srivastava

Afternoon Session

Session II: Upcoming Observing Facilities in India and U.K. and Frame-work of Future Joint Ventures

The India and UK are developing various cutting edge observational telescopes and related instruments (e.g., NLST, MAST, Aditya/Spacecoronagraph, IRIS, ROSA, 3.6. stellar DOT etc). These facilities will provide the wide cohort of the data useful to understand the riddles of the solar atmosphere. The joint collaboration will be discussed between Indian and UK scientists to utilize these facilities and related scientific outcomes. Recently the solar analogy is also being successfully used for understanding the coronae of the Sun-like stars (e.g., transients like super flares, stellar wind, and stellar MHD seismology). The connection between Sun and Sun-like stars in this context will be useful to understand and to enable the joint research.

Speakers : S.S. Hasan; A.K. Pandey; J.C. Pandey; R. Sagar; P. Venkatakrishnan