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The role of spiral arms in the chemical evolution of galactic disks

Published online by Cambridge University Press:  23 December 2005

Jacques R. D. Lépine ,
Yuri N. Mishurov  and
Irina A. Acharova
Jacques R. D. Lépine
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosf., Universidade de São Paulo, 01065-970 São Paulo/SP, Brazil email: jacques@astro.iag.usp.br
Yuri N. Mishurov
Affiliation:
Department of Space Research, Rostov State University, 5, Zorge Street, Rostov-on-Don, 344090, Russia
Irina A. Acharova
Affiliation:
Department of Space Research, Rostov State University, 5, Zorge Street, Rostov-on-Don, 344090, Russia
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Abstract

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In grand design spiral galaxies, spiral arms play a dominant role in the oxygen enrichment rate, since type II supernovae are the main source of oxygen, and these supernovae only appear in spiral arms. The connection between the spiral structure and the star formation rate explains oxygen abundance gradients that rise outward, in the external regions of a number of galaxies.

Keywords

Galaxies: abundancesgalaxies: spiral
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Symposium S228: From Lithium to Uranium: Elemental Tracers of Early Cosmic Evolution , May 2005 , pp. 595 - 596
Copyright
© 2005 International Astronomical Union