Results 71 to 80 of about 57,383 (218)
Chemistry – An Asian Journal, Volume 21, Issue 4, 25 February 2026.Recent development of cryogenic ion‐trap‐based instrumentation has extended the scope of gas‐phase laser spectroscopy to a wide variety of nonvolatile ions, including carbocations and protonated hydrocarbons, organic dyes, host‐guest complexes, micro‐hydrated ions, hypervalent ions, metal clusters, and ionic intermediates formed in solution.
Satoru Muramatsu +2 more
wiley +1 more source
Distance to the Galactic Center 7′ Halo from H I Absorption
The Astrophysical JournalUsing archival data, we have made an H I absorption study of the 7 ${}^{{\prime} }$ halo surrounding the Sgr A complex, observed toward the Galactic center (GC) region. We find strong H I absorption near velocities of −53 km s ^−1 , which is due to the 3
Debangan Maji, Subhashis Roy
doaj +1 more source
Aditional Ultra-High-Resolution Observations of Ca+ Ions in the Local Insterstellar Medium [PDF]
, 1998 We present ultra-high-resolution (0.35 km s−1 FWHM) observations of the interstellar Ca K line towards seven nearby stars. The spectral resolution was sufficient to resolve the line profiles fully, thereby enabling us to detect hitherto unresolved ...
Crawford, IA, Lallement, R, Welsh, BY
core
Ultraviolet observations of interstellar absorption lines toward SN 1987A
The Astrophysical Journal, 1989 High-dispersion IUE echelle spectra of SN 1987A were averaged in order to obtain UV absorption-line profiles of the highest possible quality in the direction of SN 1987A. The profiles for Si IV and C IV are quite similar and have much less structure than the Al III profile.
Blair D. Savage +3 more
openaire +1 more source
Beyond Sight: Neuromorphic Synapses Triggered by Invisible Light
Small, Volume 22, Issue 10, 17 February 2026.This review collects advancements in neuromorphic and optoelectronic devices, offering a structured analysis based on stimulus energy levels and architectural designs within the invisible spectrum. By categorizing recent research according to utilized wavelengths, specifically X‐ray, UV, and IR ranges, the study highlights diverse synaptic properties ...
Jisoo Park +4 more
wiley +1 more source
The Astrophysical Journal, 2023 The resonantly scattered Ly α line illuminates the extended halos of neutral hydrogen in the circumgalactic medium of galaxies. We present integral field Keck Cosmic Web Imager observations of double-peaked, spatially extended Ly α emission in 12 ...
Dawn K. Erb +7 more
doaj +1 more source
Observations of Small Scale ISM Structure in Dense Atomic Gas
, 1999 We present high resolution (R~170,000) Kitt Peak National Observatory Co'ude Feed telescope observations of the interstellar KI 7698 angstrom line towards 5 multiple star systems with saturated NaI components.
David M. Meyer +4 more
core +2 more sources
Small Structures, Volume 7, Issue 2, February 2026.This work describes how to conceive validated mixed machine learned/empirical energy functions based on finite‐sized molecular clusters for condensed phase simulations. Energy functions for pure and heterogeneous systems are one of the backbones for molecular simulation of condensed phase systems.
JingChun Wang +10 more
wiley +1 more source
The Distance to the S147 Supernova Remnant
The Astrophysical JournalIn the absence of a parallax distance to a pulsar or a surviving binary in a supernova remnant (SNR), distances to Galactic SNRs are generally very uncertain.
C. S. Kochanek +2 more
doaj +1 more source
Interstellar ultraviolet absorption lines and galactic X-ray sources
The Astrophysical Journal, 1977 X-ray photoionization can create zones of highly ionized trace elements in the interstellar gas around a galactic X-ray source. Ultraviolet absorption lines due to the resulting ionic column densities may be observable and may provide information on the environment and age of the X-ray source.
R. McCray, C. Wright, S. Hatchett
openaire +1 more source