Molecular hydrogen emission in the interstellar medium of the Large Magellanic Cloud
نویسندگان
چکیده
منابع مشابه
Molecular hydrogen formation in the interstellar medium
We have developed a model for molecular hydrogen formation under astrophysically relevant conditions. This model takes fully into account the presence of both physisorbed and chemisorbed sites on the surface, allows quantum mechanical diffusion as well as thermal hopping for absorbed H-atoms, and has been benchmarked versus recent laboratory experiments on H2 formation on silicate surfaces. The...
متن کاملInfrared Emission from Interstellar Dust. Iii. the Small Magellanic Cloud
The infrared emission from interstellar dust in the Small Magellanic Cloud is modeled using a mixture of amorphous silicate and carbonaceous grains, including a population of polycyclic aromatic hydrocarbon (PAH) molecules. We show the following: (1) This dust model is able to reproduce the spectral energy distribution from near-IR to far-IR for the entire SMC Bar region, provided that the PAH ...
متن کاملThe Interstellar Medium in the Magellanic Bridge
HST ultra-violet and ground-based optical spectroscopy are presented for DI 1388, an early-type star in the Magellanic Bridge. These data have been supplemented with H I radio mapping of its environment. The spectroscopy shows interstellar components at LSR velocities of 0, 90 and 200 km s-l corresponding to the local ISM, a high velocity cloud and the Magellanic Bridge ISM, respectively. The l...
متن کاملThe Formation of Molecular Hydrogen in the Interstellar Medium
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متن کاملMolecular hydrogen in the diffuse interstellar medium at high redshift
The physical conditions within damped Lyα systems (DLAs) can reveal the star formation history, determine the chemical composition of the associated ISM, and hence document the first steps in the formation of present day galaxies. Here we present calculations that self-consistently determine the gas ionization, level populations (atomic fine-structure levels and rotational levels of H2), grain ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2014
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stu2276