76 citations · 143 across the 19 of their papers we have counts for
19 papers
Chromospheric and Transition Region Responses of activities at the base of Coronal Plumes
Biswanath Malaker, Vishal Upendran, Durgesh Tripathi
We present the identification of the co-spatial and co-temporal small scale jets -- sometimes also named as jetlets -- at the base of the coronal hole plume associated with chromos…
The Study of Quasi-Periodic Pulsations in Solar and Stellar Flares with SKA
Valery M. Nakariakov, Atul Mohan, Vishal Upendran +5
An intensively studied phenomenon which is not described by the standard flare model are quasi-periodic pulsations (QPP) of the flaring emission. As analysis of the QPP phenomenon…
Near-Sun Switchbacks Show Statistical Signatures of Solar Activity
Sneha Pandit, Thierry Dudok de Wit, Clara Froment +3
The large amplitude, Alfvénic deflections in the solar wind, called magnetic switchbacks, are a ubiquitous feature of the inner heliosphere, yet their origin and variability remain…
Predicting the thermodynamics in the chromosphere from the translation of SDO data into the IRIS inversion results using a visual transformer model
Alberto Sainz Dalda, Vishal Upendran, Juno Kim +4
We present SDO2IRIS: a visual transformer model that translates a combination of images of the chromosphere and transition region (TR), observed by AIA, and a line-of-sight mag…
Surya: Foundation Model for Heliophysics
Sujit Roy, Johannes Schmude, Rohit Lal +30
Heliophysics is central to understanding and forecasting space weather events and solar activity. Despite decades of high-resolution observations from the Solar Dynamics Observator…
SuryaBench: Benchmark Dataset for Advancing Machine Learning in Heliophysics and Space Weather Prediction
Sujit Roy, Dinesha V. Hegde, Johannes Schmude +22
This paper introduces a high resolution, machine learning-ready heliophysics dataset derived from NASA's Solar Dynamics Observatory (SDO), specifically designed to advance machine…
X-class flare on Dec 31, 2023, observed by the Solar Ultraviolet Imaging Telescope on board Aditya-L1
Soumya Roy, Durgesh Tripathi, Vishal Upendran +10
We present the multi-wavelength study of the ejection of a plasma blob from the limb flare SOL2023-12-31T21:36:00 from NOAA 13536 observed by the Solar Ultraviolet Imaging Telescop…
Comparison of plasma dynamics in Coronal Holes and Quiet Sun using flux emergence simulations
Vishal Upendran, Durgesh Tripathi, Bhargav Vaidya +2
This paper presents a comparison of plasma dynamics in Coronal Holes (CHs) and Quiet Sun (QS) through 2.5D MHD flux emergence simulations. The magnetic reconnection between the eme…
SPACE-SUIT: An Artificial Intelligence Based Chromospheric Feature Extractor and Classifier for SUIT
Pranava Seth, Vishal Upendran, Megha Anand +6
The Solar Ultraviolet Imaging Telescope(SUIT) onboard Aditya-L1 is an imager that observes the solar photosphere and chromosphere through observations in the wavelength range of 20…
Surface Flux Transport Modeling using Physics Informed Neural Networks
Jithu J Athalathil, Bhargav Vaidya, Sayan Kundu +2
Studying the magnetic field properties on the solar surface is crucial for understanding the solar and heliospheric activities, which in turn shape space weather in the solar syste…
Thermodynamic Evolution of Plumes
Biswanath Malaker, Vishal Upendran, Durgesh Tripathi
Plumes are considered to play an important role in the origin of solar wind. However, an understanding of their thermodynamic evolution is not complete. Here, we perform a detailed…
Heating and dynamics of the Solar atmosphere
Vishal Upendran
The solar atmosphere shows anomalous variation in temperature, starting from the 5500 K photosphere to the million-degree Kelvin corona. The corona itself expands into the interste…
Nanoflare Heating of the Solar Corona Observed in X-rays
Vishal Upendran, Durgesh Tripathi, N. P. S. Mithun +2
The existence of the million-degree corona above the cooler photosphere is an unsolved problem in astrophysics. Detailed study of quiescent corona that exists regardless of the pha…
Global geomagnetic perturbation forecasting using Deep Learning
Vishal Upendran, Panagiotis Tigas, Banafsheh Ferdousi +6
Geomagnetically Induced Currents (GICs) arise from spatio-temporal changes to Earth's magnetic field which arise from the interaction of the solar wind with Earth's magnetosphere,…
On the formation of solar wind & switchbacks, and quiet Sun heating
Vishal Upendran, Durgesh Tripathi
The solar coronal heating in quiet Sun (QS) and coronal holes (CH), including solar wind formation, are intimately tied by magnetic field dynamics. Thus, a detailed comparative stu…
Properties of the C II 1334 Å line in Coronal Hole and Quiet Sun as observed by IRIS
Vishal Upendran, Durgesh Tripathi
Coronal Holes (CHs) have subdued intensity and net blueshifts when compared to Quiet Sun (QS) at coronal temperatures. At transition region temperatures, such differences are obtai…
On the Impulsive Heating of Quiet Solar Corona
Vishal Upendran, Durgesh Tripathi
The solar corona consists of a million-degree Kelvin plasma. A complete understanding of this phenomenon demands the study of Quiet Sun (QS) regions. In this work, we study QS regi…
Global Earth Magnetic Field Modeling and Forecasting with Spherical Harmonics Decomposition
Panagiotis Tigas, Téo Bloch, Vishal Upendran +6
Modeling and forecasting the solar wind-driven global magnetic field perturbations is an open challenge. Current approaches depend on simulations of computationally demanding model…
Solar wind prediction using deep learning
Vishal Upendran, M. C. M Cheung, Shravan Hanasoge +1
Emanating from the base of the Sun's corona, the solar wind fills the interplanetary medium with a magnetized stream of charged particles whose interaction with the Earth's magneto…