Estimating gas masses and dust-to-gas ratios from optical spectroscopy
نویسندگان
چکیده
منابع مشابه
Estimating gas masses and dust-to-gas ratios from optical spectroscopy
We present a method to estimate the total gas column density, dust-to-gas and dust-tometal ratios of distant galaxies from rest-frame optical spectra. The technique exploits the sensitivity of certain optical lines to changes in depletion of metals onto dust grains and uses photo-ionization models to constrain these physical ratios along with the metallicity and dust column density. We compare ...
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Comparison of dust-to-gas ratios in luminous, ultraluminous, and hyperluminous infrared galaxies
The dust-to-gas ratios in three different samples of luminous, ultraluminous, and hyperluminous infrared galaxies are calculated by modelling their radio to soft X-ray spectral energy distributions (SED) using composite models which account for the photoionizing radiation from HII regions, starbursts, or AGNs, and for shocks. The models are limited to a set which broadly reproduces the mid-IR f...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2013
ISSN: 1365-2966,0035-8711
DOI: 10.1093/mnras/stt551