82 citations · 651 across the 38 of their papers we have counts for
36 papers · 1 filter
Effects of Magnetic Fields on Solar Inertial Modes in Global Nonlinear Simulations
Conrado S. Finotti, Gustavo Guerrero, Santiago A. Triana +2
Solar inertial modes are increasingly viewed as probes of the solar interior, with recent helioseismic evidence indicating that these modes may be sensitive to the internal magneti…
Solar differential rotation driven by baroclinic forcing
L. S. Menicucci, G. Guerrero, M. Dikpati +3
A combination of recent observations and numerical simulations has called into question whether Sun's interior is characterized by strong turbulent convection, a problem known as c…
Analysis of Short-term Solar Activity Variability and Estimating the Timings of the Next Enhanced Bursts
Juie Shetye, Mausumi Dikpati
We present a hybrid forecasting strategy that combines numerical modeling, statistical forecasting, and machine learning methods to predict enhanced bursts of solar activity. These…
A Physics Informed Neural Network For Deriving MHD State Vectors From Global Active Regions Observations
Subhamoy Chatterjee, Mausumi Dikpati
Solar active regions (ARs) do not appear randomly but cluster along longitudinally warped toroidal bands ('toroids') that encode information about magnetic structures in the tachoc…
Simulations of the onset and dynamical evolution of inertial waves in solar/stellar interior
Mariane D. Souza-Gomes, Conrado S. Finotti, Gustavo Guerrero +4
Inertial modes have been recently detected in the Sun via helioseismology, yet their origin, evolution, and role in the dynamics of the solar plasma and magnetic field remain poorl…
Moderate Nesting and Cross-Equatorial Asymmetry of Active Regions in Solar Cycle 24
Aimee Norton, Alex Mendez, Ruizhu Chen +2
Solar Cycle 24 data are used to determine how often the Sun emerges sunspots in `activity nests', i.e., regions where sunspots and active regions (ARs) repeatedly emerge. We use th…
Solar Interior
Mark Linton, Mausumi Dikpati, Rachel Howe
This chapter introduces the reader to the solar interior, in particular the convection zone. The first section explores the solar cycle and the dynamo models that have been studied…
Ensemble Kalman Filter Data Assimilation Into Surface Flux Transport Model To Infer Surface Flows: An Observing System Simulation Experiment
Soumyaranjan Dash, Marc L. DeRosa, Mausumi Dikpati +4
Knowledge of the global magnetic field distribution and its evolution on the Sun's surface is crucial for modeling the coronal magnetic field, understanding solar wind dynamics, co…
Dynamics of the tachocline
Antoine Strugarek, Bernadett Belucz, Allan Sacha Brun +2
The solar tachocline is an internal region of the Sun possessing strong radial and latitudinal shears straddling the base of the convective envelope. Based on helioseismic inversio…
Deciphering Pre-solar-storm Features Of September-2017 Storm From Global And Local Dynamics
Breno Raphaldini, Mausumi Dikpati, Aimee A. Norton +4
We investigate whether global toroid patterns and the local magnetic field topology of solar active region AR12673 together can hindcast occurrence of the biggest X-flare of solar…
The Puzzling Structure of Solar Convection: Window into the Dynamo
Nicholas A. Featherstone, Kyle C. Augustson, Jonathan M. Aurnou +25
The operation of the solar dynamo, with all of its remarkable spatio-temporal ordering, remains an outstanding problem of modern solar physics. A number of mechanisms that might pl…
What Seismic Minimum Reveals About Solar Magnetism Below the Surface?
Kiran Jain, Niket Jain, Sushanta C. Tripathy +1
The Sun's magnetic field varies in multiple time scales. Observations show that the minimum between cycles 24 and 25 was the second consecutive minimum which was deeper and wider t…
Measuring the magnetic origins of solar flares, CMEs and Space Weather
Philip Judge, Matthias Rempel, Rana Ezzeddine +11
We take a broad look at the problem of identifying the magnetic solar causes of space weather. With the lackluster performance of extrapolations based upon magnetic field measureme…
Deciphering Solar Magnetic Activity: 140 Years Of The `Extended Solar Cycle' -- Mapping the Hale Cycle
Scott W. McIntosh, Robert J. Leamon, Ricky Egeland +6
We investigate the occurrence of the "extended solar cycle" (ESC) as it occurs in a host observational data spanning 140 years. Investigating coronal, chromospheric, photospheric a…
Signature of Extended Solar Cycles as Detected from Ca II K Synoptic Maps of Kodaikanal and Mount Wilson Observatory
Subhamoy Chatterjee, Dipankar Banerjee, Scott W. McIntosh +4
In the recent years there has been a resurgence of the study of Extended Solar Cycles (ESCs) through observational proxies mainly in Extreme Ultraviolet. But most of them are limit…
What the sudden death of solar cycles can tell us about the nature of the solar interior
Scott W. McIntosh, Robert J. Leamon, Ricky Egeland +3
We observe the abrupt end of solar activity cycles at the Sun's equator by combining almost 140 years of observations from ground and space. These "terminator" events appear to be…
A Three- dimensional Babcock-Leighton Solar Dynamo Model with Non-axisymmetric Convective Flows
Gopal Hazra, Mark Miesch
The observed convective flows on the photosphere (e.g., supergranulation, granulation) play a key role in the Babcock-Leighton (BL) process to generate large-scale polar fields fro…
The Extended Solar Cycle: Muddying the Waters of Solar/Stellar Dynamo Modeling Or Providing Crucial Observational Constraints?
A. K. Srivastava, S. W. McIntosh, N. Arge +17
In 1844 Schwabe discovered that the number of sunspots increased and decreased over a period of about 11 years, that variation became known as the sunspot cycle. Almost eighty year…
North-south asymmetry in Rieger-type periodicity during solar cycles 19-23
Eka Gurgenashvili, Teimuraz V. Zaqarashvili, Vasil Kukhianidze +4
Rieger-type periodicity has been detected in different activity indices over many solar cycles. It was recently shown that the periodicity correlates with solar activity having a s…
The Global Solar Dynamo
R. H. Cameron, M. Dikpati, A. Brandenburg
A brief summary of the various observations and constraints that underlie solar dynamo research are presented. The arguments that indicate that the solar dynamo is an alpha-omega d…
A Three-Dimensional Babcock-Leighton Solar Dynamo Model: Initial Results with Axisymmetric Flows
Mark S. Miesch, Kinfe Teweldebirhan
The main objective of this paper is to introduce the STABLE (Surface flux Transport And Babcock-LEighton) solar dynamo model. STABLE is a 3D Babcock-Leighton/Flux Transport dynamo…
A Babcock-Leighton solar dynamo model with multi-cellular meridional circulation in advection- and diffusion-dominated regimes
Bernadett Belucz, Mausumi Dikpati, Emese Forgacs-Dajka
Babcock-Leighton type solar dynamo models with single-celled meridional circulation are successful in reproducing many solar cycle features. Recent observations and theoretical mod…
Observations and modelling of North-South asymmetries using a Flux Transport Dynamo
Juie Shetye, Durgesh Tripathi, Mausumi Dikpati
The peculiar behaviour of the solar cycle 23 and its prolonged minima has been one of the most studied problems over the last few years. In the present paper, we study the asymmetr…
Ensemble Kalman filter data assimilation in a Babcock-Leighton solar dynamo model: an observation system simulation experiment for reconstructing meridional flow-speed
Mausumi Dikpati, Jeffrey L. Anderson, Dhrubaditya Mitra
Accurate knowledge of time-variation in meridional flow-speed and profile is crucial for estimating a solar cycle's features, which are ultimately responsible for causing space cli…