156 citations · 750 across the 25 of their papers we have counts for
25 papers
EdgeAttNet: Towards Barb-Aware Filament Segmentation
Victor Solomon, Piet Martens, Jingyu Liu +1
Accurate segmentation of solar filaments in H-alpha observations is critical for determining filament chirality, a key factor in the behavior of Coronal Mass Ejections (CMEs). Howe…
Analysis of SEP events and their possible precursors based on the GSEP Catalog
Sumanth A. Rotti, Petrus C. Martens
Solar energetic particle (SEP) events are one of the most crucial aspects of space weather. Their prediction depends on various factors including the source solar eruptions such as…
Integrated Geostationary Solar Energetic Particle Events Catalog: GSEP
Sumanth Rotti, Berkay Aydin, Manolis K. Georgoulis +1
We present a catalog of solar energetic particle (SEP) events covering solar cycles 22, 23 and 24. We correlate and integrate three existing catalogs based on Geostationary Operati…
Improved Measurements of the Sun's Meridional Flow and Torsional Oscillation from Correlation tracking on MDI \& HMI magnetograms
Sushant S. Mahajan, David H. Hathaway, Andrés Muñoz-Jaramillo +1
The Sun's axisymmetric flows, differential rotation and meridional flow, govern the dynamics of the solar magnetic cycle and variety of methods are used to measure these flows, eac…
Analysis of the Coronal Mass Ejections through Axial Field Direction of Solar Filaments and IMF Bz
Kashvi Mundra, V. Aparna, Petrus C. H. Martens
In the past, there have been many studies claiming that the effects of geomagnetic storms strongly depends on the orientation of the magnetic-cloud part of the Coronal Mass Ejectio…
A Catalog of Solar Flare Events Observed by the SOHO/EIT
Sumanth A. Rotti, Petrus C. H. Martens, Berkay Aydin
We have compiled a catalog of solar flares as observed by the Extreme ultraviolet Imaging Telescope (EIT) aboard the Solar and Heliospheric Observatory (SOHO) spacecraft and the GO…
Machine Learning in Heliophysics and Space Weather Forecasting: A White Paper of Findings and Recommendations
Gelu Nita, Manolis Georgoulis, Irina Kitiashvili +38
The authors of this white paper met on 16-17 January 2020 at the New Jersey Institute of Technology, Newark, NJ, for a 2-day workshop that brought together a group of heliophysicis…
Roadmap for Reliable Ensemble Forecasting of the Sun-Earth System
Gelu Nita, Rafal Angryk, Berkay Aydin +44
The authors of this report met on 28-30 March 2018 at the New Jersey Institute of Technology, Newark, New Jersey, for a 3-day workshop that brought together a group of data provide…
On the Prediction of >100 MeV Solar Energetic Particle Events Using GOES Satellite Data
Soukaina Filali Boubrahimi, Berkay Aydin, Petrus Martens +1
Solar energetic particles are a result of intense solar events such as solar flares and Coronal Mass Ejections (CMEs). These latter events all together can cause major disruptions…
Data Handling and Assimilation for Solar Event Prediction
Petrus C. Martens, Rafal A. Angryk
The prediction of solar flares, eruptions, and high energy particle storms is of great societal importance. The data mining approach to forecasting has been shown to be very promis…
Hemispheric Preference and Cyclic Variation of Solar Filament Chirality from 2000 to 2016
Soumitra Hazra, Sushant S. Mahajan, William Keith Douglas +1
It is well known that solar filaments are features in the solar atmosphere which show a hemispheric preference in their chirality. The hemispheric preference is such that the dextr…
The Faint Young Sun and Faint Young Stars Paradox
Petrus C. Martens
The purpose of this paper is to explore a resolution for the Faint Young Sun Paradox that has been mostly rejected by the community, namely the possibility of a somewhat more massi…
The Minimum of Solar Cycle 23: As Deep as It Could Be?
Andrés Muñoz-Jaramillo, Ryan R. Senkpeil, Dana W. Longcope +5
In this work we introduce a new way of binning sunspot group data with the purpose of better understanding the impact of the solar cycle on sunspot properties and how this defined…
Small-Scale and Global Dynamos and the Area and Flux Distributions of Active Regions, Sunspot Groups, and Sunspots: A Multi-Database Study
Andrés Muñoz-Jaramillo, Ryan R. Senkpeil, John C. Windmueller +12
In this work we take advantage of eleven different sunspot group, sunspot, and active region databases to characterize the area and flux distributions of photospheric magnetic stru…
The unusual minimum of sunspot cycle 23 a consequence of Sun's meridional plasma flow variations
Dibyendu Nandy, Andrés Muñoz-Jaramillo, Petrus C. H. Martens
Direct observations over the past four centuries show that the number of sunspots observed on the Sun's surface vary periodically, going through successive maxima and minima. Follo…
Fast Differential Emission Measure Inversion of Solar Coronal Data
Joseph Plowman, Charles Kankelborg, Petrus Martens
We present a fast method for reconstructing Differential Emission Measures (DEMs) using solar coronal data. On average, the method computes over 1000 DEMs per second for a sample a…
Magnetic Quenching of Turbulent Diffusivity: Reconciling Mixing-length Theory Estimates with Kinematic Dynamo Models of the Solar Cycle
Andrés Muñoz-Jaramillo, Dibyendu Nandy, Petrus C. H. Martens
The turbulent magnetic diffusivity in the solar convection zone is one of the most poorly constrained ingredients of mean-field dynamo models. This lack of constraint has previousl…
Empirical Modeling of Radiative versus Magnetic Flux for the Sun-as-a-Star
Dora Preminger, Dibyendu Nandy, Gary Chapman +1
We study the relationship between full-disk solar radiative flux at different wavelengths and average solar photospheric magnetic-flux density, using daily measurements from the Ki…
A Double-Ring Algorithm for Modeling Solar Active Regions: Unifying Kinematic Dynamo Models and Surface Flux-Transport Simulations
Andrés Muñoz-Jaramillo, Dibyendu Nandy, Petrus C. H. Martens +1
The emergence of tilted bipolar active regions and the dispersal of their flux, mediated via processes such as diffusion, differential rotation and meridional circulation is believ…
Solar Cycle Variation of Magnetic Flux Ropes in a Quasi-Static Coronal Evolution Model
A. R. Yeates, J. A. Constable, P. C. H. Martens
The structure of electric current and magnetic helicity in the solar corona is closely linked to solar activity over the 11-year cycle, yet is poorly understood. As an alternative…
Comparison of a Global Magnetic Evolution Model with Observations of Coronal Mass Ejections
A. R. Yeates, G. D. R. Attrill, Dibyendu Nandy +3
The relative importance of different initiation mechanisms for coronal mass ejections (CMEs) on the Sun is uncertain. One possible mechanism is the loss of equilibrium of coronal m…
Helioseismic data inclusion in solar dynamo models
Andrés Muñoz-Jaramillo, Dibyendu Nandy, Petrus C. H. Martens
An essential ingredient in kinematic dynamo models is the velocity field within the solar convection zone. In particular, the differential rotation is now well constrained by helio…
Solar Coronal Structures and Stray Light in TRACE
C. E. DeForest, P. C. H. Martens, M. J. Wills-Davey
Using the 2004 Venus transit of the Sun to constrain a semi-empirical point-spread function for the TRACE EUV solar telescope, we have measured the effect of stray light in that te…
Scaling Laws and Temperature Profiles for Solar and Stellar Coronal Loops with Non-uniform Heating
P. C. H. Martens
The bulk of solar coronal radiative loss consists of soft X-ray emission from quasi-static loops at the cores of Active Regions. In order to develop diagnostics for determining the…