177 citations · 784 across the 21 of their papers we have counts for
21 papers
SOFIA/HAWC+ Far-InfraRed Polarimetric Large Area CMZ Exploration (FIREPLACE) Survey I: General Results from the Pilot Program
Natalie O. Butterfield, David T. Chuss, Jordan A. Guerra +9
We present the first data release (DR1) of the Far-Infrared Polarimetric Large Area CMZ Exploration (FIREPLACE) survey. The survey was taken using the 214-micron band of the HAWC+…
The Strength of the Sheared Magnetic Field in the Galactic's Circum-Nuclear Disk
J. A. Guerra, E. Lopez-Rodriguez, D. T. Chuss +2
Recent high-resolution 53-m polarimetric observations from SOFIA/HAWC+ have revealed the inferred plane-of-the-sky magnetic field (B-field) orientation in the Galactic center's…
Tracing PAH Emission in -Orionis Using COBE/DIRBE Data
David T. Chuss, Brandon S. Hensley, Alan J. Kogut +3
We use archival COBE/DIRBE data to construct a map of polycyclic aromatic hydrocarbon (PAH) emission in the -Orionis region. The presence of the 3.3 m PAH feature within the…
SOFIA observations of 30 Doradus: II -- Magnetic fields and large scale gas kinematics
Le Ngoc Tram, Lars Bonne, Yue Hu +13
The heart of the Large Magellanic Cloud, 30 Doradus, is a complex region with a clear core-halo structure. Feedback from the stellar cluster R136 has been shown to be the main…
The Flare Likelihood and Region Eruption Forecasting (FLARECAST) Project: Flare forecasting in the big data & machine learning era
M. K. Georgoulis, D. S. Bloomfield, M. Piana +25
The EU funded the FLARECAST project, that ran from Jan 2015 until Feb 2018. FLARECAST had a R2O focus, and introduced several innovations into the discipline of solar flare forecas…
The strength and structure of the magnetic field in the galactic outflow of M82
Enrique Lopez-Rodriguez, Jordan Guerra, Mahboubeh Asgari-Targhi +1
Galactic outflows driven by starbursts can modify the galactic magnetic fields and drive them away from the galactic planes. Here, we quantify how these fields may magnetize the in…
Ensemble Forecasting of Major Solar Flares: Methods for Combining Models
Jordan A. Guerra, Sophie A. Murray, D. Shaun Bloomfield +1
One essential component of operational space weather forecasting is the prediction of solar flares. With a multitude of flare forecasting methods now available online it is still u…
Far-Infrared Polarization Spectrum of the OMC-1 Star-Forming Region
Joseph M. Michail, Peter C. Ashton, Marc G. Berthoud +12
We analyze the wavelength dependence of the far-infrared polarization fraction toward the OMC-1 star forming region using observations from HAWC+/SOFIA at 53, 89, 154, and 214 m…
Maps of Magnetic Field Strength in the OMC-1 using HAWC+ FIR Polarimetric data
Jordan A. Guerra, David T. Chuss, C. Darren Dowell +4
Far-infrared (FIR) dust polarimetry enables the study of interstellar magnetic fields via tracing of the polarized emission from dust grains that are partially aligned with the dir…
Which Photospheric Characteristics are Most Relevant to Active-Region Coronal Mass Ejections?
Ioannis Kontogiannis, Manolis K. Georgoulis, Jordan A. Guerra +2
We investigate the relation between characteristics of coronal mass ejections and parameterizations of the eruptive capability of solar active regions widely used in solar flare pr…
SOFIA/HAWC+ traces the magnetic fields in NGC 1068
E. Lopez-Rodriguez, C. D. Dowell, T. J. Jones +21
We report the first detection of galactic spiral structure by means of thermal emission from magnetically aligned dust grains. Our 89 m polarimetric imaging of NGC 1068 with the…
The far-infrared polarization spectrum of Rho Ophiuchi A from HAWC+/SOFIA observations
Fabio P. Santos, David T. Chuss, C. Darren Dowell +23
We report on polarimetric maps made with HAWC+/SOFIA toward Rho Oph A, the densest portion of the Rho Ophiuchi molecular complex. We employed HAWC+ bands C (89 m) and D (154 …
HAWC+/SOFIA Multiwavelength Polarimetric Observations of OMC-1
David T. Chuss, B-G Andersson, John Bally +35
We report new polarimetric and photometric maps of the massive star-forming region OMC-1 using the HAWC+ instrument on the Stratospheric Observatory for Infrared Astronomy (SOFIA).…
Photospheric Shear Flows in Solar Active Regions and Their Relation to Flare Occurrence
Sung-Hong Park, Jordan A. Guerra, Peter T. Gallagher +2
Solar active regions (ARs) that produce major flares typically exhibit strong plasma shear flows around photospheric magnetic polarity inversion lines (MPILs). It is therefore impo…
Testing and Improving a Set of Morphological Predictors of Flaring Activity
Ioannis Kontogiannis, Manolis K. Georgoulis, Sung-Hong Park +1
Efficient prediction of solar flares relies on parameters that quantify the eruptive capability of solar active regions. Several such quantitative predictors have been proposed in…
Connecting Coronal Mass Ejections to their Solar Active Region Sources: Combining Results from the HELCATS and FLARECAST Projects
Sophie A. Murray, Jordan A. Guerra, Pietro Zucca +5
Coronal mass ejections (CMEs) and other solar eruptive phenomena can be physically linked by combining data from a multitude of ground-based and space-based instruments alongside m…
Forecasting Solar Flares Using Magnetogram-based Predictors and Machine Learning
Kostas Florios, Ioannis Kontogiannis, Sung-Hong Park +4
We propose a forecasting approach for solar flares based on data from Solar Cycle 24, taken by the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory (S…
Active Region Photospheric Magnetic Properties Derived from Line-of-sight and Radial Fields
Jordan A. Guerra, Sung-H. Park, Ioannis Kontogiannis +3
The effect of using two representations of the normal-to-surface magnetic field to calculate photospheric measures that are related to active region (AR) potential for flaring is p…
Non-neutralized electric currents in solar active regions and flare productivity
Ioannis Kontogiannis, Manolis K. Georgoulis, Sung-Hong Park +1
We explore the association of non-neutralized currents with solar flare occurrence in a sizable sample of observations, aiming to show the potential of such currents in solar flare…
Ensemble Forecasting of Major Solar Flares -- First Results
J. A. Guerra, A. Pulkkinen, V. M. Uritsky
We present the results from the first ensemble prediction model for major solar flares (M and X classes). The primary aim of this investigation is to explore the construction of an…
Spatio-temporal scaling of turbulent photospheric line-of-sight magnetic field in active region NOAA 11158
Jordan A. Guerra, Antti A. Pulkkinen, Vadim M. Uritsky +1
We study structure and dynamics of the turbulent photospheric magnetic field in the active region NOAA 11158 by characterizing the spatial and temporal scaling properties of the li…