246 citations · 864 across the 20 of their papers we have counts for
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Solar-Cycle Modulation and Photospheric Magnetic Control of Turbulence in the Young Solar Wind
Yanwen Wang, Rohit Chhiber, Arcadi V. Usmanov +2
The solar wind is an outflow of solar plasma that expands from the corona to fill the heliosphere. Its turbulence provides a pathway for non-adiabatic heating and acceleration, and…
Dynamical Age of Alfvénic Turbulence in the Solar Wind
Rohit Chhiber, Yanwen Wang, Arcadi V. Usmanov +1
An evolving turbulent flow such as the solar wind can be meaningfully characterized by its "turbulence age" -- an estimate of the number of nonlinear times that have elapsed during…
Characterization of the Trans-Alfvénic Region Using Observations from Parker Solar Probe
Subash Adhikari, Riddhi Bandyopadhyay, Joshua Goodwill +14
Close to Earth the solar wind is usually super-Alfvénic, i.e. the speed of the solar wind is much larger than the Alfvén speed. However, in the lower coronal regions, the solar win…
The effect of turbulence on the angular momentum of the solar wind
Rohit Chhiber, Arcadi Usmanov, William H. Matthaeus +1
The transfer of a star's angular momentum to its atmosphere is a topic of considerable and wide-ranging interest in astrophysics. This letter considers the effect of kinetic and ma…
Observed Fluctuation Enhancement and Departure from WKB Theory in Sub-Alfvénic Solar Wind
David Ruffolo, Panisara Thepthong, Peera Pongkitiwanichakul +12
Using Parker Solar Probe data from orbits 8 through 17, we examine fluctuation amplitudes throughout the critical region where the solar wind flow speed approaches and then exceeds…
The Alfvén Transition Zone observed by the Parker Solar Probe in Young Solar Wind -- Global Properties and Model Comparisons
Rohit Chhiber, Francesco Pecora, Arcadi V Usmanov +6
The transition from subAlfvénic to superAlfvénic flow in the solar atmosphere is examined by means of Parker Solar Probe (PSP) measurements during solar encounters 8 to 14. Around…
The Sun's Alfven Surface: Recent Insights and Prospects for the Polarimeter to Unify the Corona and Heliosphere (PUNCH)
Steven R. Cranmer, Rohit Chhiber, Chris R. Gilly +7
The solar wind is the extension of the Sun's hot and ionized corona, and it exists in a state of continuous expansion into interplanetary space. The radial distance at which the wi…
Magnetic Field Line Random Walk and Solar Energetic Particle Path Lengths: Stochastic Theory and PSP/ISoIS Observation
R. Chhiber, W. H. Matthaeus, C. M. S. Cohen +21
Context:In 2020 May-June, six solar energetic ion events were observed by the Parker Solar Probe/ISoIS instrument suite at 0.35 AU from the Sun. From standard velocity-dispersion a…
Contextual Predictions for Parker Solar Probe II: Turbulence Properties and Taylor Hypothesis
Rohit Chhiber, Arcadi V. Usmanov, William H. Matthaeus +2
The Parker Solar Probe (PSP) primary mission extends seven years and consists of 24 orbits of the Sun with descending perihelia culminating in a closest approach of ($\sim 9.8~R_\o…
Contextual Predictions for Parker Solar Probe I: Critical Surfaces and Regions
Rohit Chhiber, Arcadi V. Usmanov, William H. Matthaeus +1
The solar corona and young solar wind may be characterized by critical surfaces -- the sonic, Alfvén, and first plasma- unity surfaces -- that demarcate regions where the solar…
Reconstructing the Solar Wind From Its Early History To Current Epoch
Vladimir S. Airapetian, Arcadi V. Usmanov
Stellar winds from active solar type stars can play a crucial role in removal of stellar angular momentum and erosion of planetary atmospheres. However, major wind properties excep…