56 citations · 435 across the 18 of their papers we have counts for
18 papers
The Evolution of the 1/f Range Within a Single Fast-Solar-Wind Stream Between 17.4 and 45.7 Solar Radii
Nooshin Davis, B. D. G. Chandran, T. A. Bowen +7
The power spectrum of magnetic-field fluctuations in the fast solar wind ($V_{\rm SW}> 500 \mbox{ km} \mbox{ s}^{-1}$) at magnetohydrodynamic (MHD) scales is characterized by two d…
New Observations of Solar Wind 1/f Turbulence Spectrum from Parker Solar Probe
Zesen Huang, Nikos Sioulas, Chen Shi +22
The trace magnetic power spectrum in the solar wind is known to be characterized by a double power law at scales much larger than the proton gyro-radius, with flatter spectral expo…
Dispersive and kinetic effects on kinked Alfvén wave packets: a comparative study with fluid and hybrid models
Anna Tenerani, Carlos González, Nikos Sioulas +2
We investigate dispersive and kinetic effects on the evolution of a two-dimensional kinked Alfvén wave packet by comparing results from MHD, Hall-MHD and hybrid simulations of a lo…
Proton and electron temperatures in the solar wind and their correlations with the solar wind speed
Chen Shi, Marco Velli, Roberto Lionello +8
The heating and acceleration of the solar wind remains one of the fundamental unsolved problems in heliophysics. It is usually observed that the proton temperature is highly…
On the evolution of the Anisotropic Scaling of Magnetohydrodynamic Turbulence in the Inner Heliosphere
Nikos Sioulas, Marco Velli, Zesen Huang +19
We analyze a merged Parker Solar Probe () and Solar Orbiter () dataset covering heliocentric distances to investigate…
Asteroid spin-states of a 4 Gyr collisional family
D. Athanasopoulos, J. Hanus, C. Avdellidou +29
Families of asteroids generated by the collisional fragmentation of a common parent body have been identified using clustering methods of asteroids in their proper orbital element…
Magnetic field spectral evolution in the inner heliosphere
Nikos Sioulas, Zesen Huang, Chen Shi +23
Parker Solar Probe and Solar Orbiter data are used to investigate the radial evolution of magnetic turbulence between au. The spectrum is studied as…
Preferential Proton over Electron heating from coherent structures during the first perihelion of Parker Solar Probe
Nikos Sioulas, Chen Shi, Zesen Huang +1
The solar wind undergoes significant heating as it propagates away from the Sun; the exact mechanisms responsible for this heating remain unclear. Using data from the first perihel…
Patches of magnetic switchbacks and their origins
Chen Shi, Olga Panasenco, Marco Velli +18
Parker Solar Probe (PSP) has shown that the solar wind in the inner heliosphere is characterized by the quasi omni-presence of magnetic switchbacks ("switchback" hereinafter), loca…
Conservation of Total Wave Action in the Expanding Solar Wind
Zesen Huang, Chen Shi, Marco Velli +1
The conservation of wave action in moving plasmas has been well-known for over half a century. However, wave action is not conserved when multiple wave modes propagate and coexist…
Magnetic field intermittency in the solar wind: PSP and SolO observations ranging from the Alfven region out to 1 AU
Nikos Sioulas, Zesen Huang, Marco Velli +17
and data are utilized to investigate magnetic field intermittency in the solar wind (SW). Small-scale intermittency is observed to radially strengthen…
Statistical analysis of intermittency and its association with proton heating in the near Sun environment
Nikos Sioulas, Marco Velli, Rohit Chhiber +9
We use data from the first six encounters of Parker Solar Probe and employ the Partial Variance of Increments () method to study the statistical properties of coherent structu…
ExoClock project II: A large-scale integrated study with 180 updated exoplanet ephemerides
A. Kokori, A. Tsiaras, B. Edwards +102
The ExoClock project is an inclusive, integrated, and interactive platform that was developed to monitor the ephemerides of the Ariel targets to increase the mission efficiency. Th…
Evolution of switchbacks in the inner Heliosphere
Anna Tenerani, Nikos Sioulas, Lorenzo Matteini +3
We analyze magnetic field data from the first six encounters of PSP, three Helios fast streams and two Ulysses south polar passes covering heliocentric distances $0.1\lesssim R\les…
Are Nanoflares Responsible for Coronal Heating?
Loukas Vlahos, Heinz Isliker, Nikos Sioulas
Parker (1983) suggested a mechanism for the formation of current sheets (CSs) in the solar atmosphere. His main idea was that the tangling of coronal magnetic field lines by photos…
Particle heating and acceleration by reconnecting and non-reconnecting Current Sheets
Nikos Sioulas, Heinz Isliker, Loukas Vlahos
In this article, we study the physics of charged particle energization inside a strongly turbulent plasma, where current sheets naturally appear in evolving large-scale magnetic to…
Stochastic Turbulent Acceleration in a fractal environment
Nikos Sioulas, Heinz Isliker, Loukas Vlahos
We analyze the stochastic acceleration of particles inside a fully developed turbulent plasma. It is well known that large-amplitude magnetic fluctuations and coherent structures i…
Superdiffusive Stochastic Fermi Acceleration in Space and Energy
Nikos Sioulas, Heinz Isliker, Loukas Vlahos +2
We analyze the transport properties of charged particles (ions and electrons) interacting with randomly formed magnetic scatterers (e.g.\ large scale local ``magnetic fluctuations'…