425 citations · 2.4k across the 57 of their papers we have counts for
58 papers
Measured energy exchange in coronal hole solar wind from its solar origins to the heliosphere
Yeimy J. Rivera, Alin R. Paraschiv, Samuel T. Badman +33
Coordinated ground- and space-based remote observations are used to provide a comprehensive, multi-perspective view of the solar atmosphere that we connect with in situ measurement…
UK White Paper on Space-based total solar eclipse observations: structure and dynamics of the solar atmosphere
Lucie M. Green, Nicola Baresi, Huw Morgan +19
Our Sun is uniquely placed to enable a detailed study of astrophysical plasmas and how they are governed by the magnetic fields that thread through them. On the one hand, magnetic…
Effect of Systematic Uncertainties on Density and Temperature Estimates in Coronae of Capella
Xixi Yu, Vinay L. Kashyap, Giulio Del Zanna +4
We estimate the coronal density of Capella using the O VII and Fe XVII line systems in the soft X-ray regime that have been observed over the course of the Chandra mission. Our ana…
CHIANTI -- an atomic database for emission lines -- Paper XVIII. Version 11, advanced ionization equilibrium models: density and charge transfer effects
R. P. Dufresne, G. Del Zanna, P. R. Young +4
Version 11 of the CHIANTI database and software package is presented. Advanced ionization equilibrium models have been added for low charge states of seven elements (C, N, O, Ne, M…
Determining the nanoflare heating frequency of an X-ray Bright Point observed by MaGIXS
Biswajit Mondal, P. S. Athiray, Amy R. Winebarger +18
Nanoflares are thought to be one of the prime candidates that can heat the solar corona to its multi-million kelvin temperature. Individual nanoflares are difficult to detect with…
Dark Halos around Solar Active Regions. I. Emission properties of the Dark Halo around NOAA 12706
Serena Maria Lezzi, Vincenzo Andretta, Mariarita Murabito +1
Dark areas around active regions (ARs) have been first observed in chromospheric lines more than a century ago and are now associated to the Hα fibril vortex around ARs. Nowadays,…
Multi-wavelength observations of a B-class flare using XSM, AIA, and XRT
Yamini K. Rao, B. Mondal, Giulio Del Zanna +5
We present multi-wavelength observations by Chandrayaan-2/XSM, SDO/AIA and Hinode/XRT of a B-class flare observed on 25th February, 2021, originating from an active region (AR 1280…
New atomic data for C I Rydberg states compared with solar UV spectra
P. J. Storey, R. P. Dufresne, G. Del Zanna
We use the Breit Pauli -matrix method to calculate accurate energies and radiative data for states in C I up to =30 and with . We provide the full dataset of decays t…
Hinode EIS: updated in-flight radiometric calibration
G. Del Zanna, M. Weberg, H. P. Warren
We present an update to the in-flight radiometric calibration of the Hinode EUV Imaging Spectrometer (EIS), revising and extending our previous studies. We analyze full-spectral EI…
CHIANTI -- an atomic database for emission lines -- Paper XVII: Version 10.1, revised ionization and recombination rates and other updates
Kenneth Dere, Giulio Del Zanna, Peter Young +1
The CHIANTI atomic database provides sets of assessed data used for simulating spectral observations of astrophysical plasmas. This article describes updates that will be released…
A benchmark study of atomic models for the transition region against quiet Sun observations
Roger Dufresne, Giulio Del Zanna, Helen Mason
The use of the coronal approximation to model line emission from the solar transition region has led to discrepancies with observations over many years, particularly for Li- and Na…
Role of small-scale impulsive events in heating the X-ray bright points of the quiet Sun
Biswajit Mondal, James A Klimchuk, Santosh V. Vadawale +6
Small-scale impulsive events, known as nanoflares, are thought to be one of the prime candidates that can keep the solar corona hot at its multi-million Kelvin temperature. Individ…
Evolution of elemental abundances in hot active region cores from Chandrayaan-2 XSM observations
Biswajit Mondal, Santosh V. Vadawale, Giulio Del Zanna +5
The First Ionization Potential (FIP) bias, whereby elemental abundances for low FIP elements in different coronal structures vary from their photospheric values and may also vary w…
Coronal Densities, Temperatures and Abundances During the 2019 Total Solar Eclipse: The Role of Multi-Wavelength Observations in Coronal Plasma Characterization
G. Del Zanna, J. Samra, A. Monaghan +7
The Airborne Infrared Spectrometer (AIR-Spec) offers an unprecedented opportunity to explore the Near Infra-Red (NIR) wavelength range. It has been flown at two total solar eclipse…
The First Flight of the Marshall Grazing Incidence X-ray Spectrometer (MaGIXS)
Sabrina L. Savage, Amy R. Winebarger, Ken Kobayashi +34
The Marshall Grazing Incidence X-ray Spectrometer (MaGIXS) sounding rocket experiment launched on July 30, 2021 from the White Sands Missile Range in New Mexico. MaGIXS is a unique…
Formation and Thermodynamic Evolution of plasmoids in active region jets
Sargam M. Mulay, Durgesh Tripathi, Helen Mason +2
We have carried out a comprehensive study of the temperature structure of plasmoids, which successively occurred in recurrent active region jets. The multithermal plasmoids were se…
R-matrix electron-impact excitation data for the H- and He-like ions with Z=6-30
Junjie Mao, G. Del Zanna, Liyi Gu +2
Plasma models built on extensive atomic data are essential to interpreting the observed cosmic spectra. H-like Lyman series and He-like triplets observable in the X-ray band are po…
Diagnostics of non-Maxwellian electron distributions in solar active regions from Fe XII lines observed by Hinode/EIS and IRIS
G. Del Zanna, V. Polito, J. Dudík +3
We present joint Hinode/EIS and IRIS observations of Fe XII lines in active regions, both on-disk and off-limb. We use an improved calibration for the EIS data, and find that the 1…
Multi-wavelength observations by XSM, Hinode and SDO of an active region. Chemical abundances and temperatures
G. Del Zanna, B. Mondal, Y. K. Rao +7
We have reviewed the first year of observations of the Solar X-ray Monitor (XSM) onboard Chandrayaan-2, and the available multi-wavelength observations to complement the XSM data,…
Evolution of Elemental Abundances During B-Class Solar Flares: Soft X-ray Spectral Measurements with Chandrayaan-2 XSM
Biswajit Mondal, Aveek Sarkar, Santosh V. Vadawale +6
The Solar X-ray Spectrometer (XSM) payload onboard Chandrayaan-2 provides disk-integrated solar spectra in the 1-15 keV energy range with an energy resolution of 180 eV (at 5.9 keV…
Small-scale Turbulent Motion of the Plasma in a Solar Filament as the Precursor of Eruption
Daikichi Seki, Kenichi Otsuji, Hiroaki Isobe +5
A filament, a dense cool plasma supported by the magnetic fields in the solar corona, often becomes unstable and erupts. It is empirically known that the filament often demonstrate…
Electron Densities in the Solar Corona Measured Simultaneously in the Extreme-Ultraviolet and Infra-Red
Jaroslav Dudík, Giulio Del Zanna, Ján Rybák +5
Accurate measurements of electron density are critical for determination of the plasma properties in the solar corona. We compare the electron densities diagnosed from Fe XIII line…
Helium line emissivities in the solar corona
G. Del Zanna, P. J. Storey, N. R. Badnell +1
We present new collisional-radiative models (CRMs) for helium in the quiescent solar corona, and predict the emissivities of the He and He lines to be observed by DKIST, Solar…
Plasma Diagnostics From Active Region and Quiet Sun Spectra Observed by Hinode/EIS: Quantifying the Departures from a Maxwellian Distribution
Juraj Lörinčík, Jaroslav Dudík, Giulio del Zanna +2
We perform plasma diagnostics, including that of the non-Maxwellian -distributions, in several structures observed in the solar corona by the Extreme-Ultraviolet Imaging Spectro…