Microflares and nanoflares in the solar corona

SA Bogachev, AS Ulyanov, AS Kirichenko… - Physics …, 2020 - iopscience.iop.org
Due to the increase in the spatial and temporal resolution of observations of the solar
atmosphere, which is mainly associated with progress in space research, we now …

Microflare heating of a solar active region observed with NuSTAR, Hinode/XRT, and SDO/AIA

PJ Wright, IG Hannah, BW Grefenstette… - The Astrophysical …, 2017 - iopscience.iop.org
NuSTAR is a highly sensitive focusing hard X-ray (HXR) telescope and has observed
several small microflares in its initial solar pointings. In this paper, we present the first joint …

First Results for Solar Soft X-Ray Irradiance Measurements from the Third-generation Miniature X-Ray Solar Spectrometer

TN Woods, B Schwab, R Sewell… - The Astrophysical …, 2023 - iopscience.iop.org
Three generations of the Miniature X-ray Solar Spectrometer (MinXSS) have flown on small
satellites with the goal" to explore the energy distribution of soft X-ray (SXR) emissions from …

Inference of heating properties from “hot” non-flaring plasmas in active region cores. I. Single nanoflares

WT Barnes, PJ Cargill, SJ Bradshaw - The Astrophysical Journal, 2016 - iopscience.iop.org
The properties that are expected of" hot" non-flaring plasmas due to nanoflare heating in
active regions are investigated using hydrodynamic modeling tools, including a two-fluid …

New observations of the solar 0.5–5 keV soft X-ray spectrum

A Caspi, TN Woods, HP Warren - The Astrophysical Journal …, 2015 - iopscience.iop.org
The solar corona is orders of magnitude hotter than the underlying photosphere, but how the
corona attains such high temperatures is still not understood. Soft X-ray (SXR) emission …

New solar irradiance measurements from the miniature X-ray solar spectrometer CubeSat

TN Woods, A Caspi, PC Chamberlin… - The Astrophysical …, 2017 - iopscience.iop.org
The goal of the Miniature X-ray Solar Spectrometer (MinXSS) CubeSat is to explore the
energy distribution of soft X-ray (SXR) emissions from the quiescent Sun, active regions, and …

Flare characteristics from X-ray light curves

M Gryciuk, M Siarkowski, J Sylwester, S Gburek… - Solar Physics, 2017 - Springer
A new methodology is given to determine basic parameters of flares from their X-ray light
curves. Algorithms are developed from the analysis of small X-ray flares occurring during the …

Elucidation of some solar parameters observed during solar cycles 21–24

A Bhargawa, AK Singh - Advances in Space Research, 2021 - Elsevier
Solar-terrestrial environment is manifested primarily by the physical conditions of the solar
interior, solar atmosphere and eruptive solar plasma. Each parameter gives unique …

SphinX measurements of the 2009 solar minimum X-ray emission

J Sylwester, M Kowalinski, S Gburek… - The Astrophysical …, 2012 - iopscience.iop.org
The SphinX X-ray spectrophotometer on the CORONAS–PHOTON spacecraft measured soft
X-ray emission in the 1–15 keV energy range during the deep solar minimum of 2009 with a …

Estimate of the Upper Limit on Hot Plasma Differential Emission Measure (DEM) in Non-Flaring Active Regions and Nanoflare Frequency Based on the Mg xii …

A Reva, A Ulyanov, A Kirichenko, S Bogachev, S Kuzin - Solar Physics, 2018 - Springer
Nanoflare-heating theory predicts steady hot-plasma emission in non-flaring active regions.
It is hard to find this emission with conventional non-monochromatic imagers (such as the …