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Type of talk
Seminar
Speaker
Dr. A.K. Srivastava
Affiliation
ARIES, Nainital
Venue
New Auditorium
Abstract

The stable fluxtubes possessing the ionized plasma coupled with magnetic field, when perturbed from their equilibrium, can support the evolution of
various tubular MHD modes (e.g., kink, sausage, torsional, and slow waves). These modes are now ubiquitous in the various astrophysical plasmas, e.g., the solar and stellar coronae. The detection of these MHD modes are important keeping the view of their physical properties that can be utilized in deriving many crucial local plasma conditions where they excite. In the present paper, we review the state-of-art of this continuously developing new sub-field in the Astrophysics. We present the detection of MHD modes in coronae of Sun and Sun-like stars and use of the principle of MHD seismology to understand some local physical conditions there (e.g., magnetic field) that can not be determined by classical methods. We conclude that the refinement in the MHD seismology of solar corona is also providing the best analogy to develop the stellar seismology of magnetically active similar stars to deduce the local physical conditions of their coronae.

Email Speaker
aks@aries.res.in
About Speaker

Dr. A.K. Srivastava is working in ARIES as a Scientist in the field of Solar Physics. His primary research interest is to understand the transients (e.g., spicules, jets, and large-scale eruptions) and MHD phenomena (waves, heating processes, reconnection, instabilities) in the solar atmosphere under observational and theoretical base-line.

Email Host
aks@aries.res.in
Host Name
Dr. A.K. Srivastava
Host Phone (ext/mob)
9319693141