361 citations · 3.7k across the 52 of their papers we have counts for
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Analysis of a coronal hole jet in the chromosphere and the transition region with IRIS data and SDO observations
M. Koletti, C. Gontikakis, S. Patsourakos +1
Coronal jets are transient phenomena that occur throughout the solar atmosphere, often triggered by the activation of mini-filaments. Jets are an important field of study, as they…
Potential Solar Precursors to Magnetic Switchbacks
Durgesh Tripathi, Maria S. Madjarska, Judy Karpen +9
The origin of magnetic switchbacks-large-amplitude, spherically polarized magnetic-field fluctuations with local polarity inversions shown to be nearly ubiquitous in the inner heli…
Magnetic flux cancellation in a flux-emergence magnetohydrodynamics simulation of coronal hole eruptions and jets
Spiros Patsourakos, Vasilis Archontis
We search for signatures of magnetic flux cancellation in a 3D resistive MHD flux-emergence simulation of coronal jets and eruptions in a coronal-hole-like environment. To do this,…
Multiwavelength Study of on-disk Coronal Hole Jets with IRIS and SDO observations
Myrto Koletti, Costis Gontikakis, Spiros Patsourakos +1
Solar jets are an important field of study, as they may contribute to the mass and energy transfer from the lower to the upper atmosphere. We use the Interface Region Imaging Spect…
How Magnetic Erosion Affects the Drag-Based Kinematics of Fast Coronal Mass Ejections
Sotiris Stamkos, Spiros Patsourakos, Angelos Vourlidas +1
In order to advance our understanding of the dynamic interactions between coronal mass ejections (CMEs) and the magnetized solar wind, we investigate the impact of magnetic erosion…
Constraints on the variable nature of the slow solar wind with the Wide-Field Imager on board the Parker Solar Probe
Spiros Patsourakos, Angelos Vourlidas, Alexander Nindos
In a previous work we analysed the white-light coronal brightness as a function of elongation and time from Wide-Field Imager (WISPR) observations on board the Parker Solar Probe (…
First detection of metric emission from a solar surge
C. E. Alissandrakis, S. Patsourakos, A. Nindos +2
We report the first detection of metric radio emission from a surge, observed with the Nançay Radioheliograph (NRH), STEREO and other instruments. The emission was observed during…
Multi-wavelength Observations of a Metric Type-II Event
C. E. Alissandrakis, A. Nindos, S. Patsourakos +1
We have studied a complex metric radio event which originated in a compact flare, observed with the ARTEMIS-JLS radiospectro-graph on February 12, 2010. The event was associated wi…
Relative field line helicity of a large eruptive solar active region
K. Moraitis, S. Patsourakos, A. Nindos
Context. Magnetic helicity is a physical quantity of great importance in the study of astrophysical and natural plasmas. Although a density for helicity cannot be defined, a good p…
Earth-affecting Solar Transients: A Review of Progresses in Solar Cycle 24
Jie Zhang, Manuela Temmer, Nat Gopalswamy +16
This review article summarizes the advancement in the studies of Earth-affecting solar transients in the last decade that encompasses most of solar cycle 24. The Sun Earth is an in…
Tracking solar wind flows from rapidly varying viewpoints by the Wide-field Imager for Parker Solar Probe
A. Nindos, S. Patsourakos, A. Vourlidas +3
Aims: Our goal is to develop methodologies to seamlessly track transient solar wind flows viewed by coronagraphs or heliospheric imagers from rapidly varying viewpoints. Methods: W…
Decoding the Pre-Eruptive Magnetic Field Configurations of Coronal Mass Ejections
S. Patsourakos, A. Vourlidas, T. Török +15
A clear understanding of the nature of the pre-eruptive magnetic field configurations of Coronal Mass Ejections (CMEs) is required for understanding and eventually predicting solar…
The Solar Orbiter Science Activity Plan: translating solar and heliospheric physics questions into action
I. Zouganelis, A. De Groof, A. P. Walsh +182
Solar Orbiter is the first space mission observing the solar plasma both in situ and remotely, from a close distance, in and out of the ecliptic. The ultimate goal is to understand…
When do solar erupting hot magnetic flux ropes form?
A. Nindos, S. Patsourakos, A. Vourlidas +2
We investigate the formation times of eruptive magnetic flux ropes relative to the onset of solar eruptions, which is important for constraining models of coronal mass ejection (CM…
Modeling the quiet Sun cell and network emission with ALMA
C. E. Alissandrakis, A. Nindos, T. S. Bastian +1
ALMA observations of the Sun at mm- offer a unique opportunity to investigate the temperature structure of the solar chromosphere. In this article we expand our previous work on…
Transient brightenings in the quiet Sun detected by ALMA at 3 mm
A. Nindos, C. E. Alissandrakis, S. Patsourakos +1
Using ALMA observations, we performed the first systematic survey for transient brightenings (i.e. weak, small-scale episodes of energy release) in the quiet solar chromosphere at…
Observations of solar chromospheric oscillations at 3 mm with ALMA
S. Patsourakos, C. E. Alissandrakis, A. Nindos +1
We studied chromospheric oscillations using Atacama Large millimeter and sub-millimeter Array (ALMA) time-series of interferometric observations of the quiet Sun obtained at 3 mm w…
Modeling of the sunspot-associated microwave emission using a new method of DEM inversion
C. E. Alissandrakis, V. M. Bogod, T. I. Kaltman +2
We developed a method to compute the temperature and density structure along the line of sight by inversion of the differential emission measure (DEM), under the assumptions of str…
First high-resolution look at the quiet Sun with ALMA at 3 mm
A. Nindos, C. E. Alissandrakis, T. S. Bastian +9
We present an overview of high resolution quiet Sun observations, from disk center to the limb, obtained with the Atacama Large mm and sub-mm Array (ALMA) at 3 mm. Seven quiet Sun…
A Helicity-Based Method to Infer the CME Magnetic Field Magnitude in Sun and Geospace: Generalization and Extension to Sun-Like and M-Dwarf Stars and Implications for Exoplanet Habitability
S. Patsourakos, M. K. Georgoulis
Patsourakos et al. (Astrophys. J. 817, 14, 2016) and Patsourakos and Georgoulis (Astron. Astrophys. 595, A121, 2016) introduced a method to infer the axial magnetic field in flux-r…
Center-to-limb observations of the Sun with ALMA
C. E. Alissandrakis, S. Patsourakos, A. Nindos +1
We measured the center-to-limb variation of the brightness temperature, , from ALMA full-disk images at two frequencies and inverted the solution of the transfer equation to o…
Evidence for two-loop interaction from IRIS and SDO observations of penumbral brightenings
C. E. Alissandrakis, A. Koukras, S. Patsourakos +1
We analyzed spectral and imaging data from the Interface Region Imaging Spectrograph (IRIS), images from the Atmospheric Imaging Assembly (AIA) aboard the Solar Dynamics Observator…
Solar Coronal Jets: Observations, Theory, and Modeling
N. E. Raouafi, S. Patsourakos, E. Pariat +13
Coronal jets represent important manifestations of ubiquitous solar transients, which may be the source of significant mass and energy input to the upper solar atmosphere and the s…
The spectroscopic imprint of the pre-eruptive configuration resulting into two major coronal mass ejections
Petros Syntelis, Costis Gontikakis, Spiros Patsourakos +1
We present a spectroscopic analysis of the pre-eruptive configuration of active region NOAA 11429, prior to two very fast coronal mass ejections (CMEs) on March 7, 2012 that are as…