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- Goddard Space Flight CenterUS163 papers
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17 papers · 1 filter
Two-dimensional tetramer-cuprate Na5RbCu4(AsO4)4Cl2: phase transitions and AFMorder as seen by 87Rb NMR
Raivo Stern, Ivo Heinmaa, Annika Kriisa +7
We report the Rb nuclear magnetic resonance (NMR) results in a recently synthesized Na5RbCu4(AsO4)Cl2. This complex novel two-dimensional (2D) cuprate is an unique magnetic materia…
Longitudinal and spin-Hall conductance of a two-dimensional Rashba system with arbitrary disorder
Catalin Pascu Moca, D. C. Marinescu
We calculate the longitudinal and spin-Hall conductances in four-lead bridges with Rashba - Dresselhaus spin-orbit interactions. Numerical results are obtained both within Landauer…
Hyades Oxygen Abundances from the Lambda 6300 [O I] Line: The Giant-Dwarf Discrepancy Revisited
S. C. Schuler, A. P. Hatzes, J. R. King +2
We present the results of our abundance analysis of Fe, Ni, and O in high S/N, high-resolution VLT/UVES and McDonald/2dcoude spectra of nine dwarfs and three giants in the Hyades o…
Thermonuclear Kinetics in Astrophysics
W. R. Hix, B. S. Meyer
Over the billions of years since the Big Bang, the lives, deaths and afterlives of stars have enriched the Universe in the heavy elements that make up so much of ourselves and our…
Discovery and identification of the very high redshift afterglow of GRB 050904
J. Haislip, M. Nysewander, D. Reichart +39
In 2000, Lamb and Reichart predicted that gamma-ray bursts (GRBs) and their afterglows occur in sufficient numbers and at sufficient brightnesses at very high redshifts (z > 5) to…
Oxygen from the Lambda 7774 High-Excitation Triplet in Open Cluster Dwarfs: Hyades
Simon C. Schuler, Jeremy R. King, Donald M. Terndrup +3
Oxygen abundances have been derived from the near-IR, high-excitation Lambda 7774 O I triplet in high-resolution, high signal-to-noise spectra of 45 Hyades dwarfs using standard on…