71 citations · 274 across the 20 of their papers we have counts for
20 papers
High-Resolution Solar X-ray Spectroscopy from Archived Solar Maximum Mission Data
Kenneth J. H. Phillips, Barbara Sylwester, Janusz Sylwester
Archived high-resolution X-ray spectra in the 13~Å to 22~Å range from the Flat Crystal Spectrometer (FCS), an instrument on the Solar Maximum Mission operating in the 1980s, are an…
Magnetic Energy Powers the Corona: How We Can Understand its 3D Storage & Release
Amir Caspi, Daniel B. Seaton, Roberto Casini +12
The coronal magnetic field is the prime driver behind many as-yet unsolved mysteries: solar eruptions, coronal heating, and the solar wind, to name a few. It is, however, still poo…
Varying Calcium Abundances in Solar Flares seen by Solar Maximum Mission
Barbara Sylwester, Janusz Sylwester, Kenneth J. H. Phillips +1
We report on calcium abundance estimates during the decay phases of 194 solar X-ray flares using archived data from the Bent Crystal Spectrometer (BCS) on Solar Maxim…
Detection of the third innermost radiation belt on LEO CORONAS-Photon satellite around 2009 solar minimum
Oleksiy V. Dudnik, Janusz Sylwester, Miroslaw Kowalinski +2
We analyze variations of high-energy charged particle populations filling various magnetospheric regions under, inside, and outside of the Van Allen inner and outer electron radiat…
New Solar Flare Calcium Abundances with no Surprises: Results from the SMM Bent Crystal Spectrometer
J. Sylwester, B. Sylwester, K. J. H. Phillips +1
The calcium abundance in flare plasmas is estimated using X-ray spectra from the Solar Maximum Mission Bent Crystal Spectrometer (BCS) during the decays of 194 flares (GOES classif…
On the Application of Differential Evolution to the Analysis of X-Ray Spectra
Anna Kepa, Barbara Sylwester, Marek Siarkowski +1
Using methods of differential evolution (DE,) we determined the coronal elemental abundances and the differential emission measure (DEM) distributions for the plasma flaring on 200…
STIX X-ray microflare observations during the Solar Orbiter commissioning phase
Andrea Francesco Battaglia, Jonas Saqri, Paolo Massa +34
The Spectrometer/Telescope for Imaging X-rays (STIX) is the HXR instrument onboard Solar Orbiter designed to observe solar flares over a broad range of flare sizes, between 4-150 k…
A Multiwavelength Analysis of the Long-duration Flare Observed on 15 April 2002
A. Kepa, B. Sylwester, J. Sylwester +2
We present a multiwavelength analysis of the long duration flare observed on 15 April 2002 (soft X-ray peak time at 03:55 UT, SOL2002-04-15T03:55). This flare occurred on the disk…
The soft X-ray spectrometer polarimeter SolpeX
J. Sylwester, M. Stęślicki, J. Bąkała +15
We present a novel X-ray assembly of functionally related instrument blocks intended to measure solar flare and active region (AR) spectra from within the Russian instrument comple…
Highly ionized Calcium and Argon X-ray spectra from a large solar flare
K. J. H. Phillips, J. Sylwester, B. Sylwester +5
X-ray lines of helium-like calcium (\ion{Ca}{19}) between 3.17~Å and 3.21~Å and associated \ion{Ca}{18} dielectronic satellites have previously been observed in solar flare spectra…
Non-Equilibrium Processes in the Solar Corona, Transition Region, Flares, and Solar Wind \textit{(Invited Review)}
Jaroslav Dudík, Elena Dzifčáková, Nicole Meyer-Vernet +12
We review the presence and signatures of the non-equilibrium processes, both non-Maxwellian distributions and non-equilibrium ionization, in the solar transition region, corona, so…
Diagnosing Coronal Heating Processes with Spectrally Resolved Soft X-ray Measurements
Amir Caspi, Albert Y. Shih, Harry P. Warren +2
Decades of astrophysical observations have convincingly shown that soft X-ray (SXR; ~0.1--10 keV) emission provides unique diagnostics for the high temperature plasmas observed in…
Thermal characteristics and the differential emission measure distribution during a B8.3 flare on July 04, 2009
Arun Kumar Awasthi, Barbara Sylwester, Janusz Sylwester +1
We investigate the evolution of differential emission measure distribution (DEM[T]) in various phases of a B8.3 flare, which occurred on July 04, 2009. We analyze the soft X-ray (S…
Thermal characteristics of a B8.3 flare observed on July 04, 2009
Arun Kumar Awasthi, Barbara Sylwester, Janusz Sylwester +1
We explore the temporal evolution of flare plasma parameters including temperature (T) - differential emission measure (DEM) relationship by analyzing high spectral and temporal ca…
The X-Ray Line Feature At 3.5 Kev In Galaxy Cluster Spectra
K. J. H. Phillips, B. Sylwester, J. Sylwester
Recent work by Bulbul et al. and Boyarsky et al. has suggested that a line feature at approx. 3.5 keV in the X-ray spectra of galaxy clusters and individual galaxies seen with XMM-…
RESIK Solar X-ray flare element abundances on a non-isothermal assumption
B. Sylwester, K. J. H. Phillips, J. Sylwester +1
Solar X-ray spectra from the RESIK crystal spectrometer on the {\em CORONAS-F} spacecraft (spectral range ~Å) are analyzed for thirty-three flares using a method to derive…
X-ray Flare Spectra from the DIOGENESS Spectrometer and its concept applied to ChemiX on the Interhelioprobe spacecraft
J. Sylwester, Z. Kordywski, S. Plocieniak +12
The {\em DIOGENESS} X-ray crystal spectrometer on the {\em CORONAS-F} spacecraft operated for a single month (25~August to 17~September) in 2001 but in its short lifetime obtained…
Stellar Coronae, Solar Flares: a Detailed Comparison of sigma Gem, HR 1099, and the Sun in High-resolution X-rays
David P. Huenemoerder, Kenneth J. H. Phillips, Janusz Sylwester +1
Chandra HETG spectra of the coronally active binary stars sigma Gem and HR 1099 are among the highest fluence observations for such systems taken at high spectral resolution in x-r…
Diagnostics of non-thermal distributions in solar flare spectra observed by RESIK and RHESSI
A. Kulinova, J. Kasparova, E. Dzifcakova +3
We focus on the non-thermal components of the electron distribution in the keV range and analyse high-energy resolution X-ray spectra detected by RESIK and RHESSI for three solar f…
Science Objectives for an X-Ray Microcalorimeter Observing the Sun
J. Martin Laming, J. Adams, D. Alexander +57
We present the science case for a broadband X-ray imager with high-resolution spectroscopy, including simulations of X-ray spectral diagnostics of both active regions and solar fla…