Search Publications
Fast Solar Image Classification Using Deep Learning and Its Importance for Automation in Solar Physics
Fletcher, Lyndsay; Armstrong, John A.
The volume of data being collected in solar physics has exponentially increased over the past decade and with the introduction of the Daniel K. Inouye Solar Telescope (DKIST) we will be entering the age of petabyte solar data. Automated feature detection will be an invaluable tool for post-processing of solar images to create catalogues of data re…
Modeling of the Sunspot-Associated Microwave Emission Using a New Method of DEM Inversion
Patsourakos, S.; Alissandrakis, C. E.; Bogod, V. M. +2 more
We develope a method to compute the temperature and density structure along the line of sight by inversion of the differential emission measure (DEM), under the assumptions of stratification and hydrostatic equilibrium. We apply this method to the DEM obtained from the Atmospheric Imaging Assembly (AIA) observations and use the results, together w…
Analysis of Quiescent Corona X-ray Spectra from SphinX During the 2009 Solar Minimum
Phillips, K. J. H.; Sylwester, B.; Sylwester, J. +3 more
The SphinX X-ray spectrophotometer on the CORONAS-PHOTON mission observed the 1 - 15 keV X-ray spectrum of the spatially integrated solar corona during the deep minimum of 2009, when solar activity was exceptionally low. Its sensitivity for energies >1.2 keV was higher than that of any other solar X-ray spectrometer in orbit at the time, includ…
Comprehensive Determination of the Hinode/EIS Roll Angle
Warren, Harry P.; Brooks, David H.; Baker, Deborah +5 more
We present a new coalignment method for the EUV Imaging Spectrometer (EIS) on board the Hinode spacecraft. In addition to the pointing offset and spacecraft jitter, this method determines the roll angle of the instrument, which has never been systematically measured, and which is therefore usually not corrected. The optimal pointing for EIS is com…
Association of Calcium Network Bright Points with Underneath Photospheric Magnetic Patches
Pant, Vaibhav; Banerjee, Dipankar; Narang, Nancy +1 more
Recent dedicated Hinode polar region campaigns revealed the presence of concentrated kilogauss patches of the magnetic field in the polar regions of the Sun, which are also shown to be correlated with facular bright points at the photospheric level. In this work, we demonstrate that this spatial intermittency of the magnetic field persists even up…
Velocity Structure and Temperature Dependence of an Extreme-Ultraviolet Jet Observed by Hinode
Imada, S.; Kawai, T.; Kanda, N.
The acceleration mechanism of EUV and X-ray jets is still unclear. In general, there are two candidates for the mechanism. One is magnetic reconnection, and the other is chromospheric evaporation. We observed a relatively compact X-ray jet that occurred between 10:50 - 11:10 UT on 18 February 2011 by using the Solar Dynamics Observatory/Atmospheri…