Formaldehyde Densitometry of Starburst Galaxies
نویسندگان
چکیده
منابع مشابه
Formaldehyde Densitometry of Starburst Galaxies
With a goal toward deriving the physical conditions in external galaxies, we present a survey of the formaldehyde emission in a sample of starburst systems. By extending a technique used to derive the spatial density in star formation regions in our own Galaxy, we show how the relative intensity of the 110 − 111 and 211 − 212 K-doublet transitions of H2CO can provide an accurate densitometer fo...
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The nature of the starburst phenomenon in galaxies is investigated using a narrow band color system designed to study color evolution in distant clusters. Work on zero redshift, luminous far-IR galaxies, calibrated by starburst models, demonstrates the usefulness of this color system in isolating starburst from normal star-forming colors, and also demonstrates a strong correlation with far-IR c...
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Although starburst galaxies have relatively flat spectral energy distributions, their strong optical emission lines and near-UV continua make it very feasible to estimate their redshifts photometrically. In this work, I describe a photometric technique that simultaneously (1) identifies galaxies by star formation rate and (2) measures their redshifts with an accuracy of σz = 0.05 for objects at...
متن کاملThe History of Starburst Galaxies
Dusty galaxies with luminosities in excess of 10 L⊙ have been detected out to redshifts z ∼ 1 by the Infrared Space Observatory (ISO), and to higher redshifts using millimetre(mm)and submm-wave cameras on ground-based telescopes. The integrated properties of these more distant galaxies are also constrained by measurements of the intensity of the submm-wave background radiation. While it is gene...
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I review the properties of starburst galaxies in the nearby and distant universe to decipher their evolution as a distinct extragalactic class. The physical processes and environments of massive star-formation appear to be similar out to z ∼ 4, although the modes of triggering are likely quite different, varied, and still evolving. This is argued with the use of a structural system that measure...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2008
ISSN: 0004-637X,1538-4357
DOI: 10.1086/524354