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Dr. Kota's research interest is centered around energetic particles, solar wind, and magnetic fields in the Heliosphere. He conducts theoretical and numerical studies on galactic and anomalous cosmic rays, as well as fast neutral atoms, which offer a unique tool to probe the remote areas of the heliosphere. He has developed a number of numerical codes to model the transport and acceleration of cosmic rays in the interplanetary magnetic field.
Recently, he has been involved in modeling space weather in the Earth's environment. The aim of this research is to understand, model, and forecast large solar energetic particle (SEP) events; to understand the mechanism how Coronal Mass Ejections drive a shock and accelerate ions to high (often relativistic) energies.Show Less
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Grants
- Interpreting the Signature of GeV-TeV Galactic Cosmic Rays on the Solar Surface via Turbulent Transport Within Inner Heliosphere and Solar Atmosphere
Co-Investigator (COI)
2021
$354.5K
Active - Geophysically Relevant Prediction of Solar Cycle 25
Principal Investigator (PI)
2018
$59.6K
- Geophysically Relevant Prediction of Solar Cycle 25
Principal Investigator (PI)
2016
$1.9K
- Analysis of Spacecraft Observations and Numerical Modeling of Solar-Energetic Particles Associated with Strong Interplanetary Shock Waves
Co-Investigator (COI)
2015
$376.5K
- The Origin and Transport of Energetic Charged Particles and Cosmic Rays in the Heliosphere
Co-Investigator (COI)
2015
$211.5K
- Energetic Charged Particles in the Helioshpere: Are Observations Consistent with Acceleration by Shocks?
Co-Investigator (COI)
2011
$1.0M
- Constraints on Charged-Particle Acceleration in the Sun and Heliosphere
Co-Investigator (COI)
2010
$423.4K
- IBEX Guest Investigators: Theory, Hybrid Simulation, and Modeling of Energetic Neutral Atoms in the Helopsheath
Principal Investigator (PI)
2009
$539.2K
- Acceleration and Transport of Energetic Particles: Shocks vs Turbulence
Principal Investigator (PI)
2008
$424.7K
- Physical Models of Cosmic Ray Response to Solar Inputs and Their Effects on Cosmogenic Nuclei
Principal Investigator (PI)
2008
$409.7K
Publications (27)
Recent
- On the Energy Dependence of Galactic Cosmic Ray Anisotropies in the Very Local Interstellar Medium
2022
- No Stagnation Region before the Heliopause at Voyager 1? Inferences from New Voyager 2 Results
2021
- Hybrid Simulations of Interstellar Pickup Protons Accelerated at the Solar-wind Termination Shock at Multiple Locations
2021
- Transient Cosmic-ray Events beyond the Heliopause: InterpretingVoyager-1Observations
2017
- Erratum: Erratum to: The spatial density gradient of galactic cosmic rays and its solar cycle variation observed with the Global Muon Detector Network
2016
- The Role of Particle Drifts in the Heliosphere
2016
- {Effects of Large-Scale Simple Velocity Shear on a Fluctuating Interplanetary Magnetic Field}
2015
- {On the causes and mechanisms of the long-term variations in the GCR characteristics}
2015
- {Particle Acceleration at Low Coronal Compression Regions and Shocks}
2015
- {Broken Power-law Distributions from Low Coronal Compression Regions or Shocks}
2015
- Foreword
2014
- Long-term Variation of the Solar Diurnal Anisotropy of Galactic Cosmic Rays Observed with the Nagoya Multi-directional Muon Detector
2014
- Long-living structures in the interplanetary medium according to observations of Jovian electrons
2014
- The spatial density gradient of galactic cosmic rays and its solar cycle variation observed with the Global Muon Detector Network
2014
- INTERPRETATION OF THE DISTURBANCE IN GALACTIC COSMIC RAYS OBSERVED ON VOYAGER 1 BEYOND THE HELIOPAUSE
2014
- {Compressive and Non-compressive Acceleration of Suprathermal Particles in the Heliosphere}
2014
- Are Cosmic Rays Modulated beyond the Heliopause?
2014
- Theory and Modeling of Cosmic Rays: Trends and Prospects
2013
- The Cosmic-ray Intensity near the Archean Earth
2012
- Cosmic-ray Diffusion in a Sectored Magnetic Field in the Distant Heliosheath
2012
- Modulation of the Galactic Low-energy Proton Spectrum in the Inner Heliosphere
2011
- Galactic and Anomalous Cosmic Rays during the Recent Solar Minimum
2011
- Anomalous Cosmic Rays: Where Are They Accelerated?
2011
- Particle Acceleration by Collisionless Shocks Containing Large-scale Magnetic-field Variations
2010
- Solar Cycle Dependence of the Diurnal Anisotropy of 0.6 TeV Cosmic-ray Intensity Observed with the Matsushiro Underground Muon Detector
2010
- Particle Acceleration at Near-perpendicular Shocks: The Role of Field-line Topology
2010
- Thickness of the Heliosheath, Return of the Pick-up Ions, and Voyager 1's Crossing the Heliopause
2010