Results 71 to 80 of about 789,439 (256)
Submillimeterwave Spectroscopy of and Interstellar Search for Nitrosomethane: CH3NO
The Astrophysical JournalNew measurements of nitrosomethane (CH _3 NO), a formamide isomer, were done up to 660 GHz. The molecule exhibits internal rotation motion from the CH _3 group, and therefore the analysis with a dedicated rho-axis method code, RAM36, was used. A total of
Laurent Margulès +6 more
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Nearby Supernova and Cloud Crossing Effects on the Orbits of Small Bodies in the Solar System
The Astrophysical Journal LettersSupernova (SN) blasts envelop many surrounding stellar systems, transferring kinetic energy to small bodies in the systems. Geologic evidence from ^60 Fe points to recent nearby SN activity within the past several Myr.
Leeanne Smith +2 more
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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 +13 more
wiley +1 more source
ARO-The Scientific Journal of Koya University, 2019 Cyanopolyynes have been found in the interstellar medium, cold dust cloud Taurus Molecular Cloud-1, and the Titan’s atmosphere. Theoretical calculations are carried out to predict gas and aqueous phase acidities of a series of cyanopolyynes acids.
Hassan H. Abdallah
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Observations of the Local Interstellar Cloud [PDF]
International Astronomical Union Colloquium, 1997 AbstractConstraints on the ambient (circumsolar) interstellar medium can be derived from observations of interstellar neutrals or their derivatives in the heliosphere. New results have been recently obtained which, when combined with optical and UV observations of the nearby stars (HST-GHRS, EUVE), remove long-standing contradictions and allow us to ...
openaire +1 more source
The Effect of an Inert Solid Reservoir on Molecular Abundances in Dense Interstellar Clouds
Open Astronomy, 2012 The question, what is the role of freeze-out of chemical species in determining the molecular abundances in the interstellar gas is a matter of debate.
Kalvāns Juris, Shmeld Ivar
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Organic Molecules in Translucent Interstellar Clouds [PDF]
Origins of Life and Evolution of Biospheres, 2014 Absorption spectra of translucent interstellar clouds contain many known molecular bands of CN, CH+, CH, OH, OH(+), NH, C2 and C3. Moreover, one can observe more than 400 unidentified absorption features, known as diffuse interstellar bands (DIBs), commonly believed to be carried by complex, carbon-bearing molecules.
openaire +2 more sources
A study of X-ray point sources in Heiles Clouds 1 and 2
Acta PolytechnicaStar formation takes place in the coldest parts of molecular clouds, beginning in the densest, collapsing regions of filaments. As pre-main sequence stars are luminous X-ray emitters, X-ray point sources can serve as effective tracers of YSOs.
Nóra Varga +2 more
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Cosmic-Ray Induced Diffusion in Interstellar Ices
Open Astronomy, 2014 Cosmic rays are able to heat interstellar dust grains. This may enhance molecule mobility in icy mantles that have accumulated on the grains in dark cloud cores.
Kalvāns Juris
doaj +1 more source