Publications by authors named "J Martin Laming"
Article Synopsis
- The study examines how Alfvén waves travel in the solar chromosphere, focusing on the difference between waves moving upward and downward.
- Evidence shows that these waves can reflect within the chromosphere and behave differently based on their interactions with higher layers in the solar atmosphere.
- The research suggests that these wave interactions lead to an effect that separates ions from neutral particles, influencing the solar wind's speed and elemental composition, and presenting a new insight into solar atmospheric processes.
Article Synopsis
- - This study investigates how the first ionization potential (FIP) affects the composition of slow-speed solar winds, focusing on the role of the ponderomotive force in the solar chromosphere and using data from The Advanced Composition Explorer (ACE).
- - It suggests that the enhanced abundance of sulfur, phosphorus, and carbon in these slow winds may arise from the fractionation of plasma in regions with stronger magnetic fields than typical fast wind areas, particularly around the edges of coronal holes.
- - The research identifies a specific period in 2008 with observed sulfur abundance patterns linked to declines in solar wind speed and models the sources of these slow winds through magnetic field configurations, aiming to refine understanding of solar wind composition.
We examine the different element abundances exhibited by the closed loop solar corona and the slow speed solar wind. Both are subject to the first ionization potential (FIP) effect, the enhancement in coronal abundance of elements with FIP below 10 eV (e.g.
View Article and Find Full Text PDFMagnesium isotopes of the bulk solar wind from Genesis diamond-like carbon films.
Meteorit Planet Sci
February 2020
NASA's Genesis Mission returned solar wind (SW) to the Earth for analysis to derive the composition of the solar photosphere from solar material. SW analyses control the precision of the derived solar compositions, but their ultimate accuracy is limited by the theoretical or empirical models of fractionation due to SW formation. Mg isotopes are "ground truth" for these models since, except for CAIs, planetary materials have a uniform Mg isotopic composition (within ≤1‰) so any significant isotopic fractionation of SW Mg is primarily that of SW formation and subsequent acceleration through the corona.
View Article and Find Full Text PDFWe report the discovery of optical emission from the nonradiative shocked ejecta of three young type Ia supernova remnants (SNRs): SNR 0519-69.0, SNR 0509-67.5, and N103B.
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