36 citations · 186 across the 24 of their papers we have counts for
25 papers
Simulating Ionospheric Distortions in Mock SKA-Low Solar Radio Observations
Rohit Sharma, Mitin
The Square Kilometre Array Observatory (SKAO) will provide unprecedented angular resolution for low-frequency solar radio imaging, enabling access to fine-scale coronal structures.…
Radio Galaxies detection and characterization using deep learning techniques
Sanjay Khatik, Rohit Sharma, Pankaj Jain
Future radio telescopes will generate data volumes that are increasingly difficult to analyse using traditional statistical methods, motivating the adoption of machine-learning tec…
Probing the Physics of the Solar Corona with High-Resolution Observations using SKA-Mid
Mark C. M. Cheung, John S. Morgan, Rohit Sharma +3
We examine the capability of the SKA-Mid telescope for probing solar coronal structure and evolution. Using radiative magnetohydrodynamics simulations of a solar flare, we synthesi…
Solar, Heliospheric and Ionospheric Physics: Pathfinders, Precursors and SKAO Perspective
Pietro Zucca, Rohit Sharma, Divya Oberoi +5
The Solar, Heliospheric and Ionospheric (SHI) Physics Science Working Group of the Square Kilometre Array Observatory (SKAO) addresses the full chain of plasma processes linking th…
Advancing Astrophysics with the SKA II
Anna Bonaldi, Tyler L. Bourke, Philippa Hartley +45
Advancing Astrophysics with the SKA II (AASKAII), written by our science community, outlines the transformative scientific advances that will be enabled by the SKA telescopes. In t…
Unravelling the nonthermal emissions from the quiet solar corona with the SKA
Surajit Mondal, Divya Oberoi, Rohit Sharma +4
Investigation of the nonthermal emissions from the quiet solar corona has been rather limited. This primarily stems from the fact that the emission is expected to be quite weak and…
Radio Diagnostics of Particle Acceleration in Solar Flares with SKAO Observations
Rohit Sharma, Marina Battaglia, Sijie Yu +3
Particle acceleration is a fundamental astrophysical process occurring across diverse systems and scales, producing electromagnetic emission across all wavelengths. Radio bursts fr…
Karabo: A versatile SKA Observation Simulation Framework
Rohit Sharma, Simon Felix, Luis Fernando Machado Poletti Valle +12
Karabo is a versatile Python-based software framework simplifying research with radio astronomy data. It bundles existing software packages into a coherent whole to improve the eas…
Deep learning approach for identification of HII regions during reionization in 21-cm observations -- III. image recovery
Michele Bianco, Sambit. K. Giri, Rohit Sharma +7
The low-frequency component of the upcoming Square Kilometre Array Observatory (SKA-Low) will be sensitive enough to construct 3D tomographic images of the 21-cm signal distributio…
Study of Particle Acceleration using Fine Structures and Oscillations in Microwaves from Electron Cyclotron Maser
Rohit Sharma, Marina Battaglia, Sijie Yu +3
The accelerated electrons during solar flares produce radio bursts and nonthermal X-ray signatures. The quasi-periodic pulsations (QPPs) and fine structures in spatial-spectral-tem…
Detection of long-lasting aurora-like radio emission above a sunspot
Sijie Yu, Bin Chen, Rohit Sharma +5
Auroral radio emissions in planetary magnetospheres typically feature highly polarized, intense radio bursts, usually attributed to electron cyclotron maser (ECM) emission from ene…
Magnetic Energy Powers the Corona: How We Can Understand its 3D Storage & Release
Amir Caspi, Daniel B. Seaton, Roberto Casini +12
The coronal magnetic field is the prime driver behind many as-yet unsolved mysteries: solar eruptions, coronal heating, and the solar wind, to name a few. It is, however, still poo…
Multiple Regions of Nonthermal Quasi-Periodic Pulsations during the Impulsive Phase of a Solar Flare
Yingjie Luo, Bin Chen, Sijie Yu +2
Flare-associated quasiperiodic pulsations (QPPs) in radio and X-ray wavelengths, particularly those related to nonthermal electrons, contain important information about the energy…
Preparing for Solar and Heliospheric Science with the SKAO: An Indian Perspective
Divya Oberoi, Susanta Kumar Bisoi, K. Sasikumar Raja +4
The Square Kilometre Array Observatory (SKAO) is perhaps the most ambitious radio telescope envisaged yet. It will enable unprecedented studies of the Sun, the corona and the helio…
Detection of weak ubiquitous impulsive nonthermal emissions from the solar corona
Rohit Sharma, Divya Oberoi, Marina Battaglia +1
A ubiquitous presence of weak energy releases is one of the most promising hypotheses to explain coronal heating, referred to as the nanoflare hypothesis. The accelerated electrons…
Multiple electron acceleration instances during a series of solar microflares observed simultaneously at X-rays and microwaves
Marina Battaglia, Rohit Sharma, Yingjie Luo +3
Even small solar flares can display a surprising level of complexity regarding their morphology and temporal evolution. Many of their properties, such as energy release and electro…
Study of the spatial association between an active region jet and a nonthermal type~ radio burst
Sargam M. Mulay, Rohit Sharma, Gherardo Valori +4
We aim to investigate the spatial location of the source of an active region (AR) jet and its relation with associated nonthermal type~III radio emission. An emission measure (EM)…
Radio and X-ray Observations of Short-lived Episodes of Electron Acceleration in a Solar Microflare
Rohit Sharma, Marina Battaglia, Yingjie Luo +2
Solar flares are sudden energy release events in the solar corona, resulting from magnetic reconnection, that accelerates particles and heats the ambient plasma. During a flare, th…
Propagation Effects in Quiet Sun Observations at Meter Wavelengths
Rohit Sharma, Divya Oberoi
Quiet sun meterwave emission arises from thermal bremsstrahlung in the MK corona, and can potentially be a rich source of coronal diagnostics. On its way to the observer, it gets m…
Quantifying weak non-thermal solar radio emission at low radio frequencies
Rohit Sharma, Divya Oberoi, Mihir Arjunwadkar
The recent availability of fine grained high sensitivity data from the new generation low radio frequency instruments such as the Murchison Widefield Array (MWA) have opened up opp…
Estimating solar flux density at low radio frequencies using a sky brightness model
Divya Oberoi, Rohit Sharma, Alan E. E. Rogers
Sky models have been used in the past to calibrate individual low radio frequency telescopes. Here we generalize this approach from a single antenna to a two element interferometer…
Wavelet-Based Characterization of Small-Scale Solar Emission Features at Low Radio Frequencies
Akshay Suresh, Rohit Sharma, Divya Oberoi +36
Low radio frequency solar observations using the Murchison Widefield Array have recently revealed the presence of numerous weak, short-lived and narrow-band emission features, even…
On the energisation of charged particles by fast magnetic reconnection
Rohit Sharma, Dhrubaditya Mitra, Divya Oberoi
We study the role of turbulence in magnetic reconnection, within the framework of magneto-hydrodynamics, using three-dimensional direct numerical simulations. For small turbulent i…
On the Bright Loop Top Emission in Post Eruption Arcades
Rohit Sharma, Durgesh Tripathi, Hiroaki Isobe +1
The observations of post eruption arcades (PEAs) in X-rays and EUV reveal strong localised brightenings at the loop top regions. The origin of these brightenings and their dynamics…