Results 51 to 60 of about 104,360 (261)
ChemPhysChem, EarlyView.In bulk carbonic acid (e.g., in interstellar icy dust grains) cluster formation produces two distinct UV‐Vis spectral features redshifted by ≈2 eV (25 nm) and by ≈5 eV (80 nm) compared to gas phase single molecule carbonic acid 's adiabatic ionization energy. Theory and experiment were used to investigate the origin of these shifts.
Dennis F. Dinu +7 more
wiley +1 more source
Models of the Interstellar Medium [PDF]
Highlights of Astronomy, 1980 AbstractUp-to-date models of the interstellar medium should account for the existence of at least three phases of the interstellar gas, a hot phase at ˜ 106 K (HICM), a warm phase at ˜ 104 K (WICM) and a cold phase at ≤ 102 K (clouds). Recent observations of interstellar absorption lines are used to derive information about the physical properties and ...
openaire +1 more source
Turbulence in the molecular interstellar medium [PDF]
Proceedings of the International Astronomical Union, 2006 AbstractThe observational record of turbulence within the molecular gas phase of the interstellar medium is summarized. We briefly review the analysis methods used to recover the velocity structure function from spectroscopic imaging and the application of these tools on sets of cloud data.
Christopher M. Brunt, Mark H. Heyer
openaire +3 more sources
Geostandards and Geoanalytical Research, EarlyView.Key Points Synchrotron nano‐imaging is necessary to locate elemental nanophases. Trace metal quantification requires high sensitivity nano‐XRF. Trace metal speciation relies on nano‐XANES using nano‐XRF. This chapter (Nano‐Imaging for Advanced X‐ray Fluorescence and Absorption Spectroscopy Applications) is a contribution to the Geostandards and ...
Alexandre S. Simionovici +1 more
wiley +1 more source
Variability of GRB Afterglows Due to Interstellar Turbulence [PDF]
, 1999 Gamma-Ray Burst (GRB) afterglows are commonly interpreted as synchrotron emission from a relativistic blast wave produced by a point explosion in an ambient medium, plausibly the interstellar medium of galaxies.
Abraham Loeb +3 more
core +2 more sources
The futuristic manifolds of REM sleep
Journal of Sleep Research, Volume 34, Issue 2, April 2025.Summary Since one of its first descriptions 70 years ago, rapid eye movement sleep has continually inspired and excited new generations of sleep researchers. Despite significant advancements in understanding its neurocircuitry, underlying mechanisms and microstates, many questions regarding its function, especially beyond the early neurodevelopment ...
Liborio Parrino, Ivana Rosenzweig
wiley +1 more source
Astrophysical Fractals: Interstellar Medium and Galaxies
, 1999 The interstellar medium is structured as a hierachy of gas clouds, that looks self-similar over 6 orders of magnitude in scales and 9 in masses. This is one of the more extended fractal in the Universe.
Combes, F.
core +2 more sources
Molecular cooling in the diffuse interstellar medium [PDF]
, 2013 We use a simple one-zone model of the thermal and chemical evolution of interstellar gas to study whether molecular hydrogen (H2) is ever an important coolant of the warm, diffuse interstellar medium (ISM).
Clark, P. C., Glover, S. C. O.
core +1 more source
Metallicity Dependence of Molecular Cloud Hierarchical Structure at Early Evolutionary Stages
The Astrophysical Journal, 2023 The formation of molecular clouds out of H i gas is the first step toward star formation. Its metallicity dependence plays a key role in determining star formation throughout cosmic history.
Masato I. N. Kobayashi +5 more
doaj +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract Meteorites are easily contaminated at the Earth's surface by microbial activity. Here, DNA extracts from two meteorite specimens and samples from curation laboratory surfaces are analyzed with amplicon sequencing, to understand microbial communities that contaminate meteorites and that may be resident in curation facilities.
Libby D. Tunney +4 more
wiley +1 more source