Results 91 to 100 of about 834,499 (261)

Exact Rovibronic Equivalence of the Adiabatic and Diabatic Representations of N$$ N $$‐Coupled State Diatomic Systems

Journal of Computational Chemistry, Volume 46, Issue 20, July 30, 2025.
A novel method demonstrates the numerical equivalence of adiabatic and diabatic representations in N‐state coupled diatomic systems. This crucial finding provides an efficient and accurate way to assess the importance of non‐adiabatic effects, which are often disregarded without rigorous quantitative checks.
Ryan P. Brady, S. N. Yurchenko
wiley   +1 more source

Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade

Radio Science, Volume 60, Issue 7, July 2025.
Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park, J. E. Riedel, N. Rodriguez‐Alvarez, M. Brozovic, L. A. M. Benner, P. Vergados, D. Buccino, C. S. Jacobs, L. S. Locke, S. W. Asmar, R. Castano, T. J. W. Lazio, J. Jao, C. Lee   +13 more
wiley   +1 more source

Anomalous Neutral Hydrogen Column Densities in Local Interstellar Medium Clouds

The Astrophysical Journal
Analysis of high-resolution spectra of the hydrogen and deuterium Ly α lines provides measurements of interstellar neutral hydrogen column densities N (H i ) to 113 stars within 50 pc of the Sun. Plots of N (H i ) versus distance through the LIC, G, Mic,
Jeffrey L. Linsky, Seth Redfield
doaj   +1 more source

Matrix Isolation and Solvation of the Benzonitrile Radical Anion

Chemistry – A European Journal, Volume 31, Issue 35, June 23, 2025.
Hydrated electrons are potent reducing agents that may play significant roles in chemical evolution within astrochemical and prebiotic environments. Benzonitrile, a molecule present in the interstellar medium (ISM), can capture electrons in amorphous water ice at cryogenic temperatures, forming a radical anion.
Shubhra Sarkar, Ankit Somani, Wolfram Sander   +2 more
wiley   +1 more source

Atomic and Molecular Gas in the Milky Way. I. Structure Decomposition

The Astrophysical Journal
We present GDCluster, a fully automated algorithm for decomposing a spectral-line data cube of interstellar gas into coherent structures. Assuming a multi-Gaussian nature of observed spectra, GDCluster employs and augments the derivative spectroscopy ...
Xin Liu, Fujun Du
doaj   +1 more source

Hierarchical structure of the interstellar molecular clouds and star formation

Open Astronomy, 2017
Properties of the hierarchical structures of interstellar molecular clouds are discussed. Particular attention is paid to the statistical correlations between velocity dispersion and size, and between the magnetic field strength and gas density.
Dudorov Alexander E., Khaibrakhmanov Sergey A.   +1 more
doaj   +1 more source

The cycling of carbon into and out of dust

, 2014
Observational evidence seems to indicate that the depletion of interstellar carbon into dust shows rather wide variations and that carbon undergoes rather rapid recycling in the interstellar medium (ISM).
Bocchio, Marco, Fanciullo, Lapo, Guillet, Vincent, Jones, Anthony, Jones, Anthony P., Köhler, Melanie, Micelotta, Elisabetta, Verstraete, Laurent, Ysard, Nathalie   +8 more
core   +2 more sources

Lactea: Web‐Based Spectrum‐Preserving Multi‐Resolution Visualization of the GAIA Star Catalog

Computer Graphics Forum, Volume 44, Issue 3, June 2025.
Abstract The explosion of data in astronomy has resulted in an era of unprecedented opportunities for discovery. The GAIA mission's catalog, containing a large number of light sources (mostly stars) with several parameters such as sky position and proper motion, is playing a significant role in advancing astronomy research and has been crucial in ...
Reem Alghamdi, Markus Hadwiger, Guido Reina, Alberto Jaspe‐Villanueva   +3 more
wiley   +1 more source

Clouds, Clumps, Cores & Comets - a Cosmic Chemical Connection?

, 2008
We discuss the connection between the chemistry of dense interstellar clouds and those characteristics of cometary matter that could be remnants of it. The chemical evolution observed to occur in molecular clouds is summarized and a model for dense core ...
Charnley, S. B., Rodgers, S. D.
core   +2 more sources

Structure Identification of CO Monolayer on Ag(111) Using Atomic Force Microscopy

Advanced Materials Interfaces, Volume 12, Issue 10, May 19, 2025.
Physisorption systems of CO molecules on metal surfaces have long been studied. Nondestructive analysis of weakly adsorbed systems on surfaces still remains a challenging task. In this study, the structure of the CO monolayer is successfully determined by directly visualizing individual CO molecules using atomic force microscopy (AFM).
Mitsuo Kimura, Yuji Kunisada, Yoshiaki Sugimoto   +2 more
wiley   +1 more source