Search Results - "Zanna, G."

CHIANTI—An Atomic Database for Emission Lines. XVI. Version 10, Further Extensions by Del Zanna, G., Dere, K. P., Young, P. R., Landi, E.

“…Abstract We present version 10 of the CHIANTI package. In this release, we provide updated atomic models for several helium-like ions and for all the ions of…”
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Modelling stellar irradiances I: the transition regions of FGKM stars by Deliporanidou, E, Del Zanna, G

“…ABSTRACT We employed advanced ionization equilibrium models that we developed in Dufresne et al. (2024), which include charge transfer and density effects, to…”
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CHIANTI—AN ATOMIC DATABASE FOR EMISSION LINES. XIII. SOFT X-RAY IMPROVEMENTS AND OTHER CHANGES by Landi, E, Young, P R, Dere, K P, DEL ZANNA, G, Mason, H E

“…The CHIANTI spectral code consists of two parts: an atomic database and a suite of computer programs in Python and IDL. Together, they allow the calculation of…”
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Helium line emissivities for nebular astrophysics by Del Zanna, G, Storey, P J

“…ABSTRACT We present the results of several collisional-radiative models describing optically thin emissivities of the main lines in neutral helium formed by…”
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Satellite lines from auto-ionizing states of Fe xvi and the problems with the X-ray Fe xvii lines by Del Zanna, G, Badnell, N R, Storey, P J

“…ABSTRACT We present new calculations of atomic data needed to model auto-ionizing states of Fe xvi. We compare the state energies, radiative and excitation…”
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CHIANTI—An Atomic Database for Emission Lines. XVII. Version 10.1: Revised Ionization and Recombination Rates and Other Updates by Dere, Kenneth P., Del Zanna, G., Young, P. R., Landi, E.

“…Abstract The CHIANTI atomic database provides sets of assessed data that are used for simulating spectral observations of astrophysical plasmas. This article…”
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A benchmark study of atomic models for the transition region against quiet Sun observations by Dufresne, R P, Del Zanna, G, Mason, H E

“…ABSTRACT The use of the coronal approximation to model line emission from the solar transition region has led to discrepancies with observations over many…”
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Effects of density on the oxygen ionization equilibrium in collisional plasmas by Dufresne, R P, Del Zanna, G, Badnell, N R

“…ABSTRACT The ion populations most frequently adopted for diagnostics in collisional plasmas are derived from the density independent coronal approximation. In…”
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Modelling low charge ions in the solar atmosphere by Dufresne, R P, Del Zanna, G, Storey, P J

“…ABSTRACT Extensions have been made recently to the coronal approximation for the purpose of modelling line emission from carbon and oxygen in the lower solar…”
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JOINT HIGH TEMPERATURE OBSERVATION OF A SMALL C6.5 SOLAR FLARE WITH IRIS/EIS/AIA by Polito, V., Reeves, K. K., Zanna, G. Del, Golub, L., Mason, H. E.

“…ABSTRACT We present the observation of a C6.5 class flare on 2014 February 3, obtained with the Interface Region Imaging Spectrograph (IRIS) and the EUV…”
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New atomic data for C i Rydberg states compared with solar UV spectra by Storey, P J, Dufresne, R P, Del Zanna, G

“…ABSTRACT We use the Breit–Pauli R-matrix method to calculate accurate energies and radiative data for states in C i up to n = 30 and with l ≤ 3. We provide the…”
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SIMULTANEOUS IRIS AND HINODE/EIS OBSERVATIONS AND MODELING OF THE 2014 OCTOBER 27 X2.0 CLASS FLARE by Polito, V., Reep, J. W., Reeves, K. K., Simões, P. J. A., Dudík, J., Del Zanna, G., Mason, H. E., Golub, L.

“…ABSTRACT We present a study of the X2-class flare which occurred on 2014 October 27 and was observed with the Interface Region Imaging Spectrograph (IRIS) and…”
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SLIPPING MAGNETIC RECONNECTION DURING AN X-CLASS SOLAR FLARE OBSERVED BY SDO /AIA by DUDIK, J, Janvier, M, Aulanier, G, DEL ZANNA, G, KARLICKY, M, Mason, H E, Schmieder, B

“…We present SDO/AIA observations of an eruptive X-class flare of 2012 July 12, and compare its evolution with the predictions of a three-dimensional (3D)…”
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The influence of photo-induced processes and charge transfer on carbon and oxygen in the lower solar atmosphere by Dufresne, R P, Del Zanna, G, Badnell, N R

“…ABSTRACT To predict line emission in the solar atmosphere requires models that are fundamentally different depending on whether the emission is from the…”
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Chorus wave power at the strong diffusion limit overcomes electron losses due to strong diffusion by Daggitt, T. A., Horne, R. B., Glauert, S. A., Del Zanna, G., Albert, J. M.

“…Earth’s radiation belts consist of high-energy charged particles trapped by Earth’s magnetic field. Strong pitch angle diffusion of electrons caused by…”
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Multiwavelength Observations by XSM, Hinode, and SDO of an Active Region. Chemical Abundances and Temperatures by Zanna, G. Del, Mondal, B., Rao, Y. K., Mithun, N. P. S., Vadawale, S. V., Reeves, K. K., Mason, H. E., Sarkar, A., Janardhan, P., Bhardwaj, A.

“…Abstract We have reviewed the first year of observations of the Solar X-ray Monitor (XSM) on board Chandrayaan-2 and the available multiwavelength observations…”
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CHIANTI—An Atomic Database for Emission Lines—Paper. XVIII. Version 11, Advanced Ionization Equilibrium Models: Density and Charge Transfer Effects by Dufresne, R. P., Del Zanna, G., Young, P. R., Dere, K. P., Deliporanidou, E., Barnes, W. T., Landi, E.

“…Abstract Version 11 of the chianti database and software package is presented. Advanced ionization equilibrium models have been added for low charge states of…”
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Uncertainties on atomic data. A case study: N iv by Del Zanna, G, Fernández-Menchero, L, Badnell, N R

“…Abstract We consider three recent large-scale calculations for the radiative and electron-impact excitation data of N iv, carried out with different methods…”
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Atomic data and density diagnostics for S iv by Del Zanna, G., Badnell, N. R.

“…We present a new large-scale R-matrix scattering calculation for S iv. We used the intermediate-coupling frame transformation method and applied term energy…”
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Coronal Diagnostics from Narrowband Images Around 30.4 nm by Andretta, V., Telloni, D., Del Zanna, G.

“…Images taken in the band centered at 30.4 nm are routinely used to map the radiance of the He  ii Ly α line on the solar disk. That line is one of the…”
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