NLTE calculations indicate strontium is required to explain the onset of the 1μm feature at early times in AT2017gfo, while helium can dominate at later epochs with plausible masses.
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15 Pith papers cite this work. Polarity classification is still indexing.
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Atomic systems using 85Rb Rydberg atoms and vapor provide primary measurements of blackbody radiation temperature near 130 GHz and 24.5 THz with uncertainties of 1% and 0.13 K respectively.
Non-LTE effects strengthen the K I 7698 Å line, requiring abundance corrections up to -0.7 dex that align literature values with GCE models incorporating yields from rotating massive stars.
Time-resolved spectroscopy reveals broad and narrow LPVs in O VI from WD J005311, linked to line-driven wind instabilities and an unstable RRM disk, plus a pseudo-periodic UV oscillation.
Paschen jumps in Little Red Dots indicate their continua originate from free-bound recombination emission in low-temperature nebular gas rather than thermalized or AGN components.
Multiphase CGM absorption in DESI data shows cooler ions (Ca II, Mg II) have steeper radial W profiles than C IV, with galaxy vs. quasar differences, consistent with simulations.
LRDs require Compton-thick gas at moderate metallicity plus high accretion rates producing weak X-rays to explain their non-detection, implying they are not chemically pristine.
Relativistic CI+CCSD calculations of hyperfine constants in 45Sc+ yield nuclear quadrupole moment Q = 0.222(2) b consistent with molecular data.
An extended Judd-Ofelt model yields better calculated absorption intensities for Pr3+:YAG, especially the hypersensitive transition, and identifies additional viable laser wavelengths at 566 nm and 931 nm.
The study creates a self-consistent Stark broadening database for Al II lines in laser-produced aluminum plasma by referencing Al III widths measured under identical conditions.
Computes multi-level and multi-term collisional rates for He I fine-structure levels and terms in the 10830 Å, D3 5876 Å, and related triplet lines using the frozen-core approximation.
A sensitivity study shows Tsallis q-distributions alter ionization rates for He, Li, and Be, with q<1 suppressing and q>1 enhancing low-temperature rates, while separating cross-section and EEDF uncertainties and releasing the code.
A room-temperature flash lamp prototype is presented for generating VUV light at wavelengths matching noble liquid scintillators to test light sensors.
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A Comprehensive Study on the Line Profiles and Stark Widths of Ionic Transitions from Laser Produced Aluminum Plasma
The study creates a self-consistent Stark broadening database for Al II lines in laser-produced aluminum plasma by referencing Al III widths measured under identical conditions.