107 citations · 340 across the 15 of their papers we have counts for
15 papers
Can meridional flow variations explain the observed rising/declining phase asymmetry in the solar cycle?
Soumitra Hazra, Allan Sacha Brun, Laurene Jouve
Accurate prediction of the 11-year solar cycle remains a major challenge in solar physics and is important for space weather forecasting. A persistent property of the cycle is its…
Exoplanet Radio Transits as a Probe for Exoplanetary Magnetic Fields -- Time-dependent MHD Simulations
Soumitra Hazra, Ofer Cohen, Igor V. Sokolov
We perform a series of time dependent Magnetohydrodynamic simulations of the HD 189733 star-planet system in order to predict radio transit modulations due to the interaction betwe…
Modeling Solar Wind Variations over an 11-yr Cycle with Alfvén Wave Dissipation: a Parameter Study
Soumitra Hazra, Victor Réville, Barbara Perri +3
We study the behaviour and properties of the solar wind using a 2.5D Alfvén wave driven wind model. We first systematically compare the results of an Alfvén wave (AW) driven wind m…
Distinguishing between Flaring and Non-Flaring Active Regions: A Machine Learning Perspective
Soumitra Hazra, Gopal Sardar, Partha Choudhuri
Large scale solar eruptions significantly impact space weather and damages space-based human infrastructures. It is necessary to predict large scale solar eruptions, which will ena…
Does the mean-field alpha effect have any impact on the memory of the solar cycle?
Soumitra Hazra, Allan Sacha Brun, Dibyendu Nandy
Predictions of solar cycle 24 obtained from advection-dominated and diffusion-dominated kinematic dynamo models are different if the Babcock-Leighton mechanism is the only source o…
The Origin of Parity Changes in the Solar Cycle
Soumitra Hazra, Dibyendu Nandy
Although sunspots have been systematically observed on the Sun's surface over the last four centuries, their magnetic properties have been revealed and documented only since the ea…
Excess speicific heat of the gapped sliding phonons in the incommensurate composite crystal SrCuO
Rabindranath Bag, Soumitra Hazra, R. N. Kini +1
We show that low temperature specific heat (C) of the incommensurate chain-ladder system SrCuO is enriched by the presence of a rather large excess contrib…
Simulating coronal loop implosion and compressible wave modes in a flare hit active region
Aveek Sarkar, Bhargav Vaidya, Soumitra Hazra +1
There is considerable observational evidence of implosion of magnetic loop systems inside solar coronal active regions following high energy events like solar flares. In this work,…
Hemispheric Preference and Cyclic Variation of Solar Filament Chirality from 2000 to 2016
Soumitra Hazra, Sushant S. Mahajan, William Keith Douglas +1
It is well known that solar filaments are features in the solar atmosphere which show a hemispheric preference in their chirality. The hemispheric preference is such that the dextr…
A proposed paradigm for solar cycle dynamics mediated via turbulent pumping of magnetic flux in Babcock-Leighton type solar dynamos
Soumitra Hazra, Dibyendu Nandy
At present, Babcock-Leighton flux transport solar dynamo models appear as the most promising model for explaining diverse observational aspects of the sunspot cycle. The success of…
Exploring the Origin and Dynamics of Solar Magnetic Fields
Soumitra Hazra
The Sun is a magnetically active star and is the source of the solar wind, electromagnetic radiation and energetic particles which affect the heliosphere and the Earths atmosphere.…
The Relationship between Solar Coronal X-Ray Brightness and Active Region Magnetic Fields: A Study Using High Resolution Hinode Observations
Soumitra Hazra, Dibyendu Nandy, B. Ravindra
By using high-resolution observations of nearly co-temporal and co-spatial Solar Optical Telescope spectropolarimeter and X-Ray Telescope coronal X-ray data onboard Hinode, we revi…
A Solar Dynamo Model Driven by Mean-Field Alpha and Babcock-Leighton Sources: Fluctuations, Grand-Minima-Maxima and Hemispheric Asymmetry in Sunspot Cycles
D. Passos, D. Nandy, S. Hazra +1
Extreme solar activity fluctuations and the occurrence of solar grand minima and maxima episodes, are well established, observed features of the solar cycle. Nevertheless, such ext…
A Stochastically Forced Time Delay Solar Dynamo Model: Self-Consistent Recovery from a Maunder-like Grand Minimum Necessitates a Mean-Field Alpha Effect
Soumitra Hazra, Dário Passos, Dibyendu Nandy
Fluctuations in the Sun's magnetic activity, including episodes of grand minima such as the Maunder minimum have important consequences for space and planetary environments. Howeve…
Double ring algorithm of solar active region eruptions within the framework of kinematic dynamo model
Soumitra Hazra, Dibyendu Nandy
Recent results indicate that the Babcock-Leighton mechanism for poloidal field creation plays an important role in the solar cycle. However, modelling this mechanism has not always…