Results 91 to 100 of about 36,750 (220)
The Astrophysical JournalModeling the abundance of interstellar complex organic molecules in space is a major challenge for astrophysicists. The relative roles of gas-phase and grain-surface processes in the formation and destruction of such large molecules remain unclear ...
Rosemonde Chahbazian +2 more
doaj +1 more source
Non‐innocent solvents in meteorite extractions: Evidence for artifact formation
Meteoritics &Planetary Science, Volume 61, Issue 4, Page 706-719, April 2026.Abstract Solvent extraction is a cornerstone of meteoritic organic and inorganic chemistry, yet the assumption that common solvents act as chemically inert media is becoming increasingly untenable. This study reports that low‐molecular‐weight alcohols, particularly methanol and ethanol, are “non‐innocent” solvents when used to extract soluble sulfur ...
N. Randazzo +6 more
wiley +1 more source
Stellar abundances and molecular hydrogen in high-redshift galaxies -the far-ultraviolet view
, 2006 FUSE spectra of star-forming regions in nearby galaxies are compared to composite spectra of Lyman-break galaxies (LBGs), binned by strength of Lyman alpha emission and by mid-UV luminosity.
Hoopes C. G. +5 more
core +1 more source
Mirror Mode Mediated EMIC Wave Generation in the Magnetosheath
Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.Abstract Electromagnetic ion cyclotron (EMIC) waves and mirror modes (MMs), both driven by ion temperature anisotropy, are commonly observed in planetary magnetosheaths. Conventional explanations for their co‐occurrence are largely based on linear instability theory in proton–electron plasmas, which requires comparable growth rates for the EMIC and MM ...
Yifan Wu +5 more
wiley +1 more source
Molecular Deuterations in Massive Starless Clump Candidates
The Astrophysical Journal Supplement SeriesDeuterated molecules are valuable probes for investigating the evolution and the kinematics in the earliest stages of star formation. In this study, we conduct a comprehensive investigation by performing a single-point survey of 101 starless clump ...
Kai Yang +3 more
doaj +1 more source
The Barium Star HD204075: Iron Abundance and the Absence of Evidence for Accretion
Journal of Astronomy and Space Sciences, 2019 Spectroscopic observations of barium star ζ Capricornus (HD204075) obtained at the 8.2 m telescope of the European Southern Observatory, with a spectral resolving power R = 80,000 and signal to noise ratio greater than 300, were used to refine the ...
Yeuncheol Jeong +2 more
doaj +1 more source
ChemPhysChem, Volume 27, Issue 6, 27 March 2026.Laser irradiation of a 2,3‐diaminomaleonitrile (DAMN) molecule (white) induces decomposition into the highlighted products (yellow). The laptop denotes a computational simulation designed to mimic the laser ablation experiment. We investigate the fragmentation chemistry of 2,3‐diaminomaleonitrile (DAMN), a key hydrogen cyanide (HCN) tetramer in ...
Marta Castiñeira Reis +1 more
wiley +1 more source
The abundant elements in interstellar dust
The Astrophysical Journal, 1994 We explore the incorporation of the cosmically abundant species O, C, N, Mg, Si, Fe, and S into interstellar dust. Column densities based on Goddard High Resolution Spectrograph 3.5 km/s resolution measurements from the literature for eight individual absorbing regions toward five lines of sight are used.
Ulysses J. Sofia +2 more
openaire +1 more source
On the Formation of CO2 and Other Interstellar Ices
, 2011 We investigate the formation and evolution of interstellar dust-grain ices under dark-cloud conditions, with a particular emphasis on CO2. We use a three-phase model (gas/surface/mantle) to simulate the coupled gas--grain chemistry, allowing the ...
Garrod, Robin T., Pauly, Tyler
core +1 more source
Carbon Isotope Fractionation of Complex Organic Molecules in Star-forming Cores
The Astrophysical JournalRecent high-resolution and sensitivity Atacama Large Millimeter/submillimeter Array observations have unveiled the carbon isotope ratios ( ^12 C/ ^13 C) of complex organic molecules (COMs) in a low-mass protostellar source. To understand the ^12 C/ ^13 C
Ryota Ichimura +2 more
doaj +1 more source