Physics
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993egte.conf..187p&link_type=abstract
In NASA. Ames Research Center, The Evolution of Galaxies and Their Environment p 187-188 (SEE N93-26706 10-90)
Physics
1
Dwarf Galaxies, Far Infrared Radiation, Irregular Galaxies, Magellanic Clouds, Massive Stars, Solar Neighborhood, Spiral Galaxies, Stellar Winds, Ultraviolet Radiation, Energy Budgets, Hydrogen, Infrared Radiation, Metallicity
Scientific paper
Irregular dwarf galaxies are about ten times more widespread in the universe than regular spiral galaxies. They are characterized by a relatively low metallicity, i.e., lower abundance of the heavier elements (metals) with respect to hydrogen than in the solar neighborhood. These heavier elements in the form of molecules, atoms, or ions, which have radiative transitions in the infrared play a decisive role in the energy balance of the ISM and thereby for the formation of stars. Dwarf galaxies are thus model cases for the physical conditions in the early phase of the universe. Large Magellanic Cloud: 30 Doradus. The two nearest dwarf galaxies are the Magellanic clouds at a distance approximately 50 kpc. The LMC contains 30 Dor, a region with young, extremely massive stars which strongly interact with the surrounding ISM on account of their stellar winds and intense UV radiation. 30 Dor is the brightest object in the LMC at almost all wavelengths.
Geis Norbert
Genzel Reinhard
Herrmann Fabian
Madden Suzanne C.
Poglitsch Albrecht
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