Work

Solar Physics | Astroinformatics | Radio & X-ray Astrophysics
My Image

Dr. Rohit Sharma

List of Students

List of Research Collaborators (2024)

My Research Interests

PhD & M.Tech Projects & smaller projects are available based on the following research interests.

Write to me at rohitcbscient@gmail.com or rsharma@iitk.ac.in

  1. Spacecraft Charging in Solar Wind

    2. Spacecraft travelling in space experiences variety of plasma environemnts depending on the space weather. The space weather is dictated by the solar acitivity. The spacecraft develops electrostatic surface and bulk currents due in the plasma environment. In this project, we are aiming to build a tools to simulate surface and bulk currents of the spacecraft.
    Collaborators: Soumyabrata Chakravarty

  2. Ray tracing in Solar Corona

    3. The radio waves in the solar corona travels through inhomogeneous medium and undergo scattering. Using ray tracing algorithms, we simulate the ray propagation in the solar corona. We modify pyC2ray ray tracing code to accomodate coronal scattering. Collaborators: Michele Bianco, ETH Zurich, Switzerland

  3. Generative AI models for Radiative transfer in the Corona

    4. Scattering in solar corona is a suitable problem for machine learning. We employ high radio solar maps to learn the radio wave proagation at low frequencies. Collaborators: Brandon Panos, FHNW, Switzerland

  4. Electron Beam Propagation in the Solar Corona

    5. Particle acceleration from magnetic reconnections can produce electron beams. They propagate into the solar corona and undergo wave-particle intractions. Here, we study the simulation of electron beam propagation using particle-in-cell codes at kinetic scales. Collaborators: Bhoosan Paradkar, CEBS, Mumbai.

  5. Making Solar Radio Instrument

    6. This is an instrumentation endevour to build a solar monintering stations at low, mid and high frequencies covering from 100 MHz to 10 GHz, with high freqeuncy-time resolution settings. The niche area of capturing solar spikes in time, freqeuncy and spatial location will be a key feature. Collaborators: Avinash Deshpande, IIT Kanpur

  6. STIX-MWA Solar Observations

    7. Making an common list of interesting events from MWA and STIX. This will enable statistical studies with solar MWA data.
    Collaborators: Predrag, Andre Csillaghy, FHNW

  7. Theory of coronal turbulance and refraction

    8. Refraction in the solar corona is an important phenomena in the radio wave propagation. Large scale refraction of the radio waves occurs due to gradual change in the magnetic field. In this project, we aim to develop theoritical framework to incorporate the refraction into the existing scattering codes.
    Collaborators: Supratik, IIT Kanpur

  8. MHD waves in the Radio and EUV observations

    9. MHD wave signatures imprint on the radio sources via variations in the spatial-temporal spaces. By combining high resolution EUV and radio imaging spectroscopy, we aim to study the MHD regime in various flaring events.
    Collaborators: Abhishek Shrivastava, IIT BHU

  9. Building Mock-data for Square Kilometer Array



    10. Square Kilometer Array (SKA) will provide unprecedented images and many possible discoveries of the radio sky. Therefore, the significance of the faint signals to be detected by SKA and the nature of manifestation of various types of noise in the images must be understood. The idea of the project is to develop an end-to-end radio SKA observation simulator (KARABO) for various science cases. Some use cases are: HI Intensity mapping from Meerkat and SKA-mid; Epoch of Reionisation; SKA data challenge-3 etc..


  10. Simulations of Solar Radio Observation



    11. Since the concept of the tool developed within the above pipeline is general, it can be used to make radio solar maps. The telesscope models from various telescopes will be applied to the solar sciences and forward modelling of flares/CMEs and quiet Sun in radio.

  11. 3-D Stereoscopic Particle Acceleration in the Solar Flare

    Solar X-ray and Radio Observations are complementary counterparts of the particle acceleration in a solar flare. Using Very Large Array Observations radio observations and RHESSI X-ray imaging and spectroscopy, we constraint conditions of particle acceleration. Now, we also add observations from various instruments onboard Parker Solar Probes and Solar Orbiter into the project.







  12. Low Frequency MWA's Solar Physics Studies

    Solar radio observations at meter wavelengths allow us to study various coronal diagnostic, including unique faint energetic releases. I use the solar data from Murchison Widefield Array, low freqeuncy precursor of SKA to investigate different solar science questions.




  13. Simulation-based Project

    Magnetic reconnection scenerio were studied in the presence of turbulance. The reconnection rates were studied along with the particle distributions.

    14. Chromospheric evaporations simulations were carried out to show the loop top brightenings. We studied the strengths of loop top density enhancements and forward modelled EIS intensties.


  14. Master Thesis: Plasma Wakefield Acceleration

    Particle-in Cell Simulations: Plasma wakefield acceleration for simulating electron propagation in the background plasma. Various electron beam and plasma intraction