Search Publications
The SunPy Project: An interoperable ecosystem for solar data analysis
Ryan, Daniel F.; Ireland, Jack; Hayes, Laura A. +6 more
The SunPy Project is a community of scientists and software developers creating an ecosystem of Python packages for solar physics. The project includes the sunpy core package as well as a set of affiliated packages. The sunpy core package provides general purpose tools to access data from different providers, read image and time series data, and t…
MORPHOFIT: An automated galaxy structural parameters fitting package
Tortorelli, Luca; Mercurio, Amata
In today's modern wide-field galaxy surveys, there is the necessity for parametric surface brightness decomposition codes characterised by accuracy, small degree of user intervention, and high degree of parallelisation. We try to address this necessity by introducing \textsc{morphofit}, a highly parallelisable \textsc{python} package for the estim…
Review and outlook of solar energetic particle measurements on multispacecraft missions
Reames, Donald V.
The earliest evidence of spatial distributions of solar energetic particles (SEPs) compared events from many different source longitudes on the Sun, but the early Pioneers provided the first evidence of the large areas of equal SEP intensities across the magnetically confined "reservoirs" late in the events. More detailed measurements of the impor…
The high energy X-ray probe (HEX-P): studying extreme accretion with ultraluminous X-ray sources
Maitra, Chandreyee; Mori, Kaya; Wolter, Anna +25 more
Introduction: Ultraluminous X-ray sources (ULXs) represent an extreme class of accreting compact objects: from the identification of some of the accretors as neutron stars to the detection of powerful winds travelling at 0.1–0.2 c, the increasing evidence points towards ULXs harbouring stellar-mass compact objects undergoing highly super-Eddington…
Evaluating the performance of empirical models of total electron density and whistler-mode wave amplitude in the Earth's inner magnetosphere
Ma, Qianli; Shen, Xiao-Chen; Li, Wen +4 more
Empirical models have been previously developed using the large dataset of satellite observations to obtain the global distributions of total electron density and whistler-mode wave power, which are important in modeling radiation belt dynamics. In this paper, we apply the empirical models to construct the total electron density and the wave ampli…
Multi-wavelength observations and modeling of a microflare: constraining non-thermal particle acceleration
Reeves, Katharine K.; Polito, Vanessa; Yu, Sijie +5 more
In this work we analyze a small B-class flare that occurred on 29 April 2021 and was observed simultaneously by the Interface Region Imaging Spectrograph (IRIS) and the Nuclear Spectroscopic Telescope Array (NuSTAR) X-ray instrument. The IRIS observations of the ribbon of the flare show peculiar spectral characteristics that are typical signatures…
Full-wave modeling of EMIC wave packets: ducted propagation and reflected waves
Ma, Qianli; Shen, Xiao-Chen; Hanzelka, Miroslav +4 more
Electromagnetic ion cyclotron (EMIC) waves can scatter radiation belt electrons with energies of a few hundred keV and higher. To accurately predict this scattering and the resulting precipitation of these relativistic electrons on short time scales, we need detailed knowledge of the wave field's spatio-temporal evolution, which cannot be obtained…
On the phenomenology of magnetosheath jets with insight from theory, modelling, numerical simulations and observations by Cluster spacecraft
Voitcu, Gabriel; Echim, Marius; Munteanu, Costel +5 more
During recent years magnetosheath plasma structures called "jets" are identified in spacecraft data as localized regions in the magnetosheath where the dynamic pressure is enhanced compared to the background. Although the nomenclature and detection algorithms vary from author to author, magnetosheath jets are part of a larger class of phenomena wh…
Assessment of the arrival signatures of the March 2012 CME–CME interaction event with respect to Mercury, Venus, Earth, STEREO-B, and Mars locations
Thampi, R. Satheesh; Soni, Shirsh Lata; Selvakumaran, R.
In March 2012, favourable positions of Mercury, Venus, Earth, Mars, and STEREO-B in the inner solar system provided an opportunity to understand the global structure and the propagation of a CME across the inner solar system. On March 7, 2012, the Sun ejected two very fast CMEs from solar active region NOAA AR11489, which were accompanied by two X…
On the nature of Tycho Brahe's supernova
Ruiz-Lapuente, Pilar
At the 450 years anniversary of its observation, the supernova named after Tycho Brahe, SN 1572, can be explained in the terms used nowadays to characterize Type Ia supernovae (SNe Ia). By assembling the records of the observations made in 1572–74 and evaluating their uncertainties, it is possible to recover the light curve and the color evolution…