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Molecular Hydrogen in Star-forming regions: implementation of its micro-physics in Cloudy

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arxiv astro-ph/0501485 v1 pith:HPOS72ZC submitted 2005-01-22 astro-ph

classification astro-ph
keywords environmentsastrophysicalhydrogenimportantmolecularaccuratebalancebaryonic
verification ladder T0 review T1 audit T2 compute T3 formal

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Much of the baryonic matter in the Universe is in the form of H2 which includes most of the gas in galactic and extragalactic interstellar clouds. Molecular hydrogen plays a significant role in establishing the thermal balance in many astrophysical environments and can be important as a spectral diagnostic of the gas. Modeling and interpretation of observations of such environments requires a quantitatively complete and accurate treatment of H2. Using this micro-physical model of H2, illustrative calculations of prototypical astrophysical environments are presented. This work forms the foundation for future investigations of these and other environments where H2 is an important constituent.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Resolving dense photo-dissociation regions: the structure of photochemical fronts in three-dimensional gas distributions

    astro-ph.GA 2026-08 conditional novelty 7.0 of 10

    A three-dimensional PDR model shows that overlapping H2 dissociation and C+ recombination fronts, plus the arc-like H2 emission seen in the Orion Bar, arise from shadowing by dense clumps in a fractal gas distribution.

  2. HydroX, a light dark matter search with hydrogen-doped liquid xenon time projection chambers

    hep-ex 2025-05 conditional novelty 7.0 of 10

    HydroX, a proposed hydrogen-doped liquid xenon TPC, projects sensitivity to sub-GeV dark matter through enhanced proton-recoil signals in a large xenon detector.

  3. Unveiling Metal Mixing in a Grand-Design Spiral: A UV-optical multiphase spatially resolved study of M83

    astro-ph.GA 2026-08 conditional novelty 6.0 of 10

    Multiphase abundance mapping of M83 reveals a persistent roughly 1.5 dex nitrogen excess in ionized gas relative to neutral gas around young clusters, indicating slow metal mixing in a massive spiral.

  4. Direct Collapse Black Hole Candidates from Decaying Dark Matter

    hep-ph 2025-09 unverdicted novelty 6.0 of 10

    Axion dark matter decay injects 1-13.6 eV photons that suppress H2, enabling atomic cooling halos and direct collapse black hole seeds for axion masses 24.5-26.5 eV and couplings down to 4e-12/GeV.

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