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Title: DEPENDENCE OF NEBULAR HEAVY-ELEMENT ABUNDANCE ON H I CONTENT FOR SPIRAL GALAXIES

We analyze the galactic H I content and nebular log (O/H) for 60 spiral galaxies in the Moustakas et al. (2006a) spectral catalog. After correcting for the mass-metallicity relationship, we show that the spirals in cluster environments show a positive correlation for log (O/H) on DEF, the galactic H I deficiency parameter, extending the results of previous analyses of the Virgo and Pegasus I clusters. Additionally, we show for the first time that galaxies in the field obey a similar dependence. The observed relationship between H I deficiency and galactic metallicity resembles similar trends shown by cosmological simulations of galaxy formation including inflows and outflows. These results indicate the previously observed metallicity-DEF correlation has a more universal interpretation than simply a cluster's effects on its member galaxies. Rather, we observe in all environments the stochastic effects of metal-poor infall as minor mergers and accretion help to build giant spirals.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. Department of Astronomy, University of Texas, Austin, TX 78712 (United States)
  2. Astronomy Department, University of Arizona, Tucson, AZ 85721 (United States)
  3. Carnegie Observatories, Pasadena, CA 91101-1292 (United States)
Publication Date:
OSTI Identifier:
22140313
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 773; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CATALOGS; CORRELATIONS; ELEMENT ABUNDANCE; GALAXIES; MASS; METALS; NEBULAE; SIMULATION; SPIRAL CONFIGURATION; STOCHASTIC PROCESSES