Computer Science
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989msngr..57...57t&link_type=abstract
The Messenger, vol. 57, p. 57-60
Computer Science
3
Dwarf Galaxies: Star Formation, Irregular Galaxies: Star Formation
Scientific paper
Contrary to the more spectacular and appealing Spiral and Elliptical Galaxies, for a long time Irregular Galaxies have not been considered to deserve detailed studies. Only in the last decade, the difficulty found in the interpretation of the major evolutionary processes taking place in bigger, more complicated galaxies, has led to new interest in Irregulars, which should be easier to understand, for a number of circumstances. he structures of Irregular Galaxies appear, in fact, to be simple, with no omblnatlon of halo and disk phases and no special evidence of dynamical ~henomena playing an important role. ehey contain a large amount of gas, aSlly detected by radio telescopes wh' , Ich means that they are in a relatively ~h~rIY stage .of the evolution. Besides s, their vIsible stellar content is young enOugh to indicate that Star Formation rISe a.ct'Ive .In these galaxies, several H11 glons are present and allow the derivation of the metallicity even at large distances.For all these reasons Irreguar Galaxies seem to offer a suitable ground for studying the basic phenomena Controlling the evolution of galaxies.
Focardi Paola
Greggio Laura
Marconi Gianni
Tosi Mia
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