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Slow Solar Wind Connection Science during Solar Orbiter's First Close Perihelion Passage
D'Amicis, Raffaella; Teriaca, Luca; Hirzberger, Johann +76 more
The Slow Solar Wind Connection Solar Orbiter Observing Plan (Slow Wind SOOP) was developed to utilize the extensive suite of remote-sensing and in situ instruments on board the ESA/NASA Solar Orbiter mission to answer significant outstanding questions regarding the origin and formation of the slow solar wind. The Slow Wind SOOP was designed to lin…
Spectral Features of the Solar Transition Region and Chromospheric Lines at Flare Ribbons Observed with IRIS
Cheng, X.; Ding, M. D.; Li, Y. +2 more
We report on the spectral features of the Si IV λ1402.77, C II λ1334.53, and Mg II h or k lines, formed in the layers from the transition region to the chromosphere, in three two-ribbon flares (with X, M, and C class) observed with IRIS. All three lines show significant redshifts within the main flare ribbons, which mainly originate from the chrom…
In the Trenches of the Solar-Stellar Connection. VII. Wilson-Bappu 2022
Ayres, Thomas
The Wilson-Bappu effect (WBE) is a remarkable correlation between the width of the chromospheric emission core of the Ca II 3934 Å K line and stellar absolute visual magnitude over an astonishing range, from diminutive red dwarfs to bloated yellow supergiants. The WBE signifies a deep connection between the nonclassical, mechanically heated chromo…