Search Publications
Observation of the Solar Corona Using Radio Scintillation with the Akatsuki Spacecraft: Difference Between Fast and Slow Wind
Matsumoto, Takuma; Pätzold, Martin; Imamura, Takeshi +8 more
The properties of the coronal plasma at heliocentric distances of 1.5 - 8.9 R⊙ (solar radii) were studied with radio-occultation observations using JAXA's Akatsuki spacecraft in 2016. Physical parameters that characterize the solar wind were retrieved from the intensity-scintillation time series by fitting a theoretical spectrum to the …
Searching for a Solar Source of Magnetic-Field Switchbacks in Parker Solar Probe's First Encounter
Mandrini, C. H.; Raouafi, N. E.; Velli, M. +9 more
Parker Solar Probe observations show ubiquitous magnetic-field reversals closer to the Sun, often referred to as "switchbacks". The switchbacks have been observed before in the solar wind near 1 AU and beyond, but their occurrence was historically rare. PSP measurements below ∼ 0.2 AU show that switchbacks are, however, the most prominent structur…
Spectral Lines in FUV and EUV for Diagnosing Coronal Magnetic Field
Nagaraju, K.; Khan, Raveena
The diagnostic capabilities of spectral lines in the far-ultraviolet (FUV) and extreme-ultraviolet (EUV) wavelength ranges are explored in terms of their Hanle and Zeeman sensitivity to probe the vector magnetic fields in the solar corona. The temperature range covered is log10(T)=5.5 - 6.3. The circular-polarization signal due to longi…
Solar Observations with Single-Dish INAF Radio Telescopes: Continuum Imaging in the 18 - 26 GHz Range
Iacolina, M. N.; Pellizzoni, A.; Egron, E. +28 more
We present a new solar radio imaging system implemented through the upgrade of the large single-dish telescopes of the Italian National Institute for Astrophysics (INAF), not originally conceived for solar observations.
Properties of EUV Imaging Spectrometer (EIS) Slot Observations
Ugarte-Urra, Ignacio; Young, Peter R.
The Extreme ultraviolet Imaging Spectrometer (EIS) on board the Hinode spacecraft has been operating since 2006, returning high-resolution data in the 170 - 212 and 246 - 292 Å wavelength regions. EIS has four slit options, with the narrow 1'' and 2'' slits used for spectroscopy and the wide 40'' and 266''