Cumulative Oxygen Abundances of Spiral Galaxies

Autor:	Dack, Stuart, McCall, Marshall L.
Rok vydání:	2012
Předmět:	Astrophysics - Galaxy Astrophysics
Zdroj:	2012, ApJ, 750, 167
Druh dokumentu:	Working Paper
DOI:	10.1088/0004-637X/750/2/167
Popis:	Studying the global evolution of spiral galaxies requires determining their overall chemical compositions. However, since spirals tend to possess gradients in their chemical compositions, determining their overall chemical abundances poses a challenge. In this study, the framework for a newly proposed method for determining the overall oxygen abundance of a disk is established. By separately integrating the absolute amounts of hydrogen and oxygen out to large radii, the cumulative oxygen abundance is shown to approach an asymptotic value. In this manner, a reliable account of the overall chemical state of a disk is revealed. Comment: 14 pages, 7 figures, 5 tables
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1204.1744 Zobrazit plný text záznamu View this record from Arxiv