Time-resolved properties and global trends in dMe flares from simultaneous photometry and spectra
AF Kowalski, SL Hawley, JP Wisniewski… - The Astrophysical …, 2013 - iopscience.iop.org
We present a homogeneous analysis of line and continuum emission from simultaneous
high-cadence spectra and photometry covering near-ultraviolet and optical wavelengths for …
high-cadence spectra and photometry covering near-ultraviolet and optical wavelengths for …
The Sun as a star: observations of white-light flares
M Kretzschmar - Astronomy & Astrophysics, 2011 - aanda.org
Context. Solar flares radiate energy at all wavelengths, but the spectral distribution of this
energy is still poorly known. White-light continuum emission is sometimes observed, and …
energy is still poorly known. White-light continuum emission is sometimes observed, and …
[HTML][HTML] On extreme geomagnetic storms
Extreme geomagnetic storms are considered as one of the major natural hazards for
technology-dependent society. Geomagnetic field disturbances can disrupt the operation of …
technology-dependent society. Geomagnetic field disturbances can disrupt the operation of …
Eruptive–Impulsive Homologous M-class Flares Associated with Double-decker Flux Rope Configuration in Minisigmoid of NOAA 12673
We present a multiwavelength analysis of two homologous, short-lived, impulsive flares of
GOES class M1. 4 and M7. 3 that occurred from a very localized minisigmoid region within …
GOES class M1. 4 and M7. 3 that occurred from a very localized minisigmoid region within …
On the injection of helicity by the shearing motion of fluxes in relation to flares and coronal mass ejections
An investigation of helicity injection by photospheric shear motions is carried out for two
active regions (ARs), NOAA 11158 and 11166, using line-of-sight magnetic field …
active regions (ARs), NOAA 11158 and 11166, using line-of-sight magnetic field …
Velocity and magnetic transients driven by the X2. 2 white-light flare of 2011 February 15 in NOAA 11158
RA Maurya, P Vemareddy… - The Astrophysical …, 2012 - iopscience.iop.org
The first X-class flare of the current solar cycle 24 occurred in Active Region NOAA 11158
during its central meridian passage on 2011 February 15. This two-ribbon white-light flare …
during its central meridian passage on 2011 February 15. This two-ribbon white-light flare …
Non-LTE calculations of the Fe I 6173 Å line in a flaring atmosphere
The Fe i 6173 Å line is widely used in the measurements of vector magnetic fields by
instruments including the Helioseismic and Magnetic Imager (HMI). We perform non-local …
instruments including the Helioseismic and Magnetic Imager (HMI). We perform non-local …
Altitude Heterogeneity of Magnetic Fields and Doppler Velocities in the Area of Seismic Source of a Strong Solar Flare from Data in Helium, Sodium, and Nickel Lines
Measurements of magnetic fields near seismic sources during solar flares are vital for
understanding the dynamics of solar activity. We used spectropolarimetric observations of …
understanding the dynamics of solar activity. We used spectropolarimetric observations of …
Chromospheric Sunspot Oscillations in Hα and Ca ii 8542 Å
We study chromospheric oscillations including umbral flashes and running penumbral
waves in a sunspot of active region NOAA 11242 using scanning spectroscopy in Hα and …
waves in a sunspot of active region NOAA 11242 using scanning spectroscopy in Hα and …
Case study of a magnetic transient in NOAA 11429 observed by SDO/HMI during the M7. 9 flare on 2012 March 13
BJ Harker, AA Pevtsov - The Astrophysical Journal, 2013 - iopscience.iop.org
ABSTRACT NOAA 11429 was the source of an M7. 9 X-ray flare at the western solar limb
(N18 W63) on 2012 March 13 at 17: 12 UT. Observations of the line-of-sight magnetic flux …
(N18 W63) on 2012 March 13 at 17: 12 UT. Observations of the line-of-sight magnetic flux …