Results 71 to 80 of about 3,957 (226)
Plausibility of ultraviolet burst generation in the low solar chromosphere
, 2022 Context. Ultraviolet (UV) bursts and Ellerman bombs (EBs) are small-scale magnetic reconnection events taking place in the highly stratified, low solar atmosphere.
Lei Ni +5 more
core +1 more source
Space Weather Impact of Three Solar Flares Observed by the POEMAS Telescope at 45 and 90 GHz
Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.Abstract Solar flares are often associated with coronal mass ejections (CMEs) that, when directed toward Earth, can disrupt the magnetosphere and impact space weather. In this study, we investigate three long‐duration solar flares observed in 2012 by the POlarization Emission of Millimeter Activity at the Sun (POEMAS) telescopes at 45 and 90 GHz.
Adriana Valio +4 more
wiley +1 more source
The Role of Partial Ionization Effects in the Chromosphere
, 2015 The energy for the coronal heating must be provided from the convection zone. The amount and the method by which this energy is transferred into the corona depends on the properties of the lower atmosphere and the corona itself.
Martinez-Sykora, Juan +3 more
core +1 more source
Space Weather, Volume 23, Issue 11, November 2025.Abstract A new daily composite of the solar flare index (SFI) and the hemispherically‐resolved versions (hSFI) are presented for 1937 to 2024. The data set confirms that the northern hemisphere (NH) dominated solar flare activity during Solar Cycles 17 to 21, but that the southern hemisphere has dominated from Solar Cycle 22 to present.
V. M. Velasco Herrera +14 more
wiley +1 more source
The Astrophysical Journal, 2023 The intensity and the linear scattering polarization profiles of the hydrogen Ly α line encode valuable information on the thermodynamic and magnetic structure of the upper layers of the solar chromosphere.
E. Alsina Ballester +2 more
doaj +1 more source
Solar Spectroscopy and (Pseudo-)Diagnostics of the Solar Chromosphere
, 2010 I first review trends in current solar spectrometry and then concentrate on comparing various spectroscopic diagnostics of the solar chromosphere. Some are actually not at all chromospheric but just photospheric or clapotispheric and do not convey ...
Raveendran, A.S.N. +6 more
core +1 more source
Solar Radio Wide‐Band Spectroscopy and Imaging Facilities of the Chinese Meridian Project Phase II
Space Weather, Volume 23, Issue 11, November 2025.Abstract Solar eruptions, including flares and coronal mass ejections, are the most energetic phenomena in the solar system. These explosive events accelerate high‐energy particles and generate electromagnetic radiation from radio to gamma‐ray wavelengths, producing heliospheric disturbances and acting as primary drivers of space weather hazards.
Yihua Yan +19 more
wiley +1 more source
Formation of the Transition Region for the Quiet Sun
The Astrophysical Journal Letters, 2023 We propose a partially ionized collisional two-fluid model of the formation of the transition region between the cool dense chromosphere and hot tenuous corona for the quiet Sun.
Paul Song, Jiannan Tu, David B. Wexler
doaj +1 more source
Dynamics of the Quiet Solar Chromosphere [PDF]
, 1999 The solar chromosphere has never been static although it was often modeled so.Even the quiet-sun internetwork chromosphere has become thoroughly dynamic with the acoustic shock interpretation of the Ca II K 2V grains.
Rutten, R.J. +3 more
core
The Cold Heart of the Solar Chromosphere
, 2016 A power-point presentation describing potential impact of ALMA on probing cold gas in the solar ...
Ayres, Thomas (5284981), Ayres, Thomas
core +1 more source