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Solar Elemental Abundances
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Review of the history of solar system elemental abundances with a new assessment of elemental and isotopic abundances from CI-chondrites and solar data. Solar elemental abundances, or solar system elemental abundances refer to the complement of chemical elements in the entire solar system. The sun contains more than 99-percent of the mass in the solar system and therefore the composition of the sun is a good proxy for the composition of the overall solar system. The solar system composition can be taken as the overall composition of the molecular cloud within the interstellar medium from which the solar system formed 4.567 billion years ago. Active research areas in astronomy and cosmochemistry model collapse of a molecular cloud of solar composition into a star with a planetary system, and the physical and chemical fractionation of the elements during planetary formation and differentiation. The solar system composition is the initial composition from which all solar system objects (the sun, terrestrial planets, gas giant planets, planetary satellites and moons, asteroids, Kuiper-belt objects, and comets) were derived. (Abstract truncated).
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Cited by 7 Pith papers
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Phase-dependent chemistry of WASP-43 b revealed with a suite of one-, two-, and three-dimensional models
Horizontal quenching at wind speeds ≳500 m/s, plus carbon-sulfur chemistry, explains the MIRI non-detection of night-side methane on WASP-43 b without requiring high metallicity.
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White dwarfs within 13 pc: Insights from ultraviolet spectroscopy
UV spectroscopy of the 44 nearest white dwarfs reveals a 2–6% temperature discrepancy between UV and optical model fits, six UV-only metal detections, and a 30% planetary debris accretion rate.
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Axion lines from nuclear de-excitations in galactic stellar populations
No 14.4 keV axion line from 57Fe de-excitations is seen by NuSTAR toward M87, M82, M31, or the Galactic Center, yielding |g_ann x g_aγγ| < 1.1e-22 GeV^-1 for m_a < 1e-10 eV.
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Shocks and complex chemodynamics in the metal-poor starburst galaxy CGCG 007-025 revealed through high-resolution echelle spectroscopy
In CGCG 007-025, high-resolution spectroscopy resolves a kinematically distinct, asymmetric HeII line and line ratios that imply fast radiative shocks at 250-300 km/s, and shows the claimed [FeX] coronal detection is ...
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The Origins of Lithium Enhancement in Polluted White Dwarfs
Lithium enhancements in several polluted white dwarfs are most consistent with Big Bang and Galactic nucleosynthesis rather than continental crust or spalled-ring exomoons, with one object defying all three explanations.
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Time Resolved Absorption of Six Chemical Species With MAROON-X Points to Strong Drag in the Ultra Hot Jupiter TOI-1518 b
Time-resolved absorption trails of six species in TOI-1518 b favor a strong atmospheric drag, with Fe+ requiring stronger drag than Fe, suggesting magnetic effects.
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Unraveling the non-equilibrium chemistry of the temperate sub-Neptune K2-18 b
A grid of non-equilibrium chemical models fit to JWST spectra of K2-18 b favors high metallicity (266x solar) and C/O > 2.1, with methane robustly detected.
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