Results 31 to 40 of about 6,299 (262)
An opaque Sun? The potential for future, higher opacities to solve the solar abundance problem
EPJ Web of Conferences, 2017 Last year Bailey et al. announced their measurement of iron opacity that increases the Rosseland mean at the base of the solar convection zone by 7%.
Trampedach Regner
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Constraining Solar Abundances Using Helioseismology
The Astrophysical Journal, 2004 To appear in ApJ Letters. 12 pages (that include 4 figures)
Basu, Sarbani, Antia, H. M.
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The Astrophysical JournalThe element abundances of stars, particularly the refractory elements (e.g., Fe, Si, and Mg), play an important role in connecting stars to their planets. Most Sun-like stars do not have refractory abundance measurements since obtaining a large sample of
Rayna Rampalli +4 more
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Determining Solar Abundances Using Helioseismology
The Astrophysical Journal, 2006 The recent downward revision of solar photospheric abundances of Oxygen and other heavy elements has resulted in serious discrepancies between solar models and solar structure as determined through helioseismology. In this work we investigate the possibility of determining the solar heavy-element abundance without reference to spectroscopy by using ...
Antia, H. M., Basu, Sarbani
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FEBS Open Bio, EarlyView.This review provides an overview of bio‐based polymer sources, their unique functional properties and their environmental impact, and addresses their role as sustainable alternatives. It discusses end‐of‐life options, including composting and anaerobic digestion for renewable energy.
Sabina Kolbl Repinc +8 more
wiley +1 more source
Geophysical Research Letters, 2016 Solar wind charge exchange occurs at Earth between the neutral planetary exosphere and highly charged ions of the solar wind. The main challenge in predicting the resultant photon flux in the X‐ray energy bands is due to the interaction efficiency, known
Ian C. Whittaker, Steve Sembay
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Extended 3He-rich Time Periods Observed by Solar Orbiter: Magnetic Connectivity and Sources
The Astrophysical Journal, 2023 Observations of Solar Energetic Particles (SEPs) using the Suprathermal Ion Spectrograph (SIS), which is part of the Energetic Particle Detector suite on the Solar Orbiter mission, present an unprecedented opportunity to investigate the composition and ...
A. Kouloumvakos +6 more
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THE LTE SOLAR ABUNDANCE OF NEODYMIUM [PDF]
Al-Azhar Bulletin of Science, 2014 We study the solar photospheric abundance of singly ionized neodymium (Nd II) using high resolution spectroscopic data obtained by Fourier transform spectrograph (FTS). Based on the Local Thermodynamical Equilibrium (LTE) assumption, a new value of Nd abundance is derived.
Abdelkawy, A. G. A. +3 more
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Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures
Advanced Engineering Materials, EarlyView.This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
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Frontiers in Astronomy and Space SciencesA striking feature in the observed chemical composition of the majority of stars is the universality of the relative abundances of the heavy elements, although some outliers exist.
David Blaschke +6 more
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