| Name: | Bijoy Dalal |
| Affiliation: | Physical Research Laboratory, Ahmedabad |
| Conference ID : | ASI2024_520 |
| Title : | Study of origin and acceleration of suprathermal and solar energetic particles using Aditya-L1 data |
| Authors : | B. Dalal (1, 2), D. Chakrabarty (1), N. Srivastava (3), A. Sarkar (1) |
| Authors Affiliation: | (1) Physical Research Laboratory, Ahmedabad, India
(2) Indian Institute of Technology Gandhinagar, Gandhinagar, India
(3) Udaipur Solar Observatory, Physical Research Laboratory, Udaipur, India
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| Mode of Presentation: | Poster |
| Abstract Category : | Sun, Solar System, Exoplanets, and Astrobiology |
| Abstract : | Solar energetic particles (SEPs) with energies from hundreds of keV per nucleon to hundreds of MeV per nucleon pose great threat to space-based resources and technologies. These particles are broadly categorized into two classes – gradual and impulsive – based on origin, composition, and acceleration processes. Gradual SEPs are generally associated with interplanetary shocks driven by coronal mass ejections (CMEs). On the other hand, impulsive SEPs are believed to be generated in solar flares. How these particles are accelerated up to such high energies is a topic of research. It is thought that SEPs are accelerated from suprathermal particles (with energies from tens of keV per nucleon to hundreds keV per nucleon). However, the exact mechanism (s) responsible for such acceleration is (are) poorly understood till date. Understanding the behaviours of both suprathermal and SEPs is important in terms of space weather prediction, which in turn, will help us take precautionary measures to reduce damages to space technologies.
India’s first dedicated solar mission Aditya-L1 contains four remote sensing and three in-situ payloads. SupraThermal and Energetic Particle Spectrometer (STEPS), a subsystem of the Aditya Solar wind Particle EXperiment (ASPEX) on board the Aditya-L1, measures suprathermal and SEPs from six different directions. In this talk, potential use of STEPS data, in combination with complementary data from other payloads on board Aditya-L1, to study origins and acceleration mechanisms of these energetic particles will be discussed.
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