Anomalous Neutral Hydrogen Column Densities in Local Interstellar Medium Clouds
The Astrophysical JournalAnalysis 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
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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. +1 more
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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 ...
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Atomic and Molecular Gas in the Milky Way. I. Structure Decomposition
The Astrophysical JournalWe 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
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Efficient stabilization of cyanonaphthalene by fast radiative cooling and implications for the resilience of small PAHs in interstellar clouds. [PDF]
Nat Commun, 2023 Stockett MH +8 more
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Isomer-specific kinetics of the C+ + H2O reaction at the temperature of interstellar clouds. [PDF]
Sci Adv, 2021 Yang T +7 more
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INTERSTELLAR CLOUDS BY SEARCHLIGHT
The Astronomical Journal, 2009 Interpretation of high-resolution observations of absorption by interstellar clouds of radiation from extragalactic sources should include the effect of the Earth's motion with respect to the source. High-resolution H I absorption profiles that are not heavily blended have been published for eight sources.
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Abundances of Chemical Elements in Open Star Clusters as Indicators of their Nature
Open Astronomy, 2015 Applying a compilled catalog, we find that the relative abundances of α-elements in open clusters and in field stars of the thin disk of the Galaxy show different dependencies on metallicity, age and parameters of their Galactic orbits.
Marsakov V. A. +3 more
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Evidence for Spatially Distinct Galactic Dust Populations
The Astrophysical JournalWe present an implementation of a Bayesian mixture model using Hamiltonian Monte Carlo techniques to search for the spatial separation of Galactic dust populations. Utilizing intensity measurements from the Planck High Frequency Instrument, we apply this
Corwin Shiu +7 more
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Photodissociation of OH in Interstellar Clouds
The Astrophysical Journal, 1984 Calculations are presented of the lifetime of OH against photodissociation by the interstellar radiation field as a function of depth into interstellar clouds containing grains of various scattering properties. The effectiveness of the different photodissociation channels changes with depth into a cloud. Absorption into the repulsive - state is usually
Dishoeck, E.F. van, Dalgarno, A.
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