Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-02T19:05:29.654Z Has data issue: false hasContentIssue false

How surface density of galaxy disks affects metallicity? Outflow and Accretion

Published online by Cambridge University Press:  12 September 2016

Po-Feng Wu
Affiliation:
University of Hawaii, Institute for Astronomy, 2680 Woodlawn Drive, HI 96822, USA
Rolf-Peter Kudritzki
Affiliation:
University of Hawaii, Institute for Astronomy, 2680 Woodlawn Drive, HI 96822, USA University Observatory Munich, Scheinerstr. 1, D-81679 Munich, Germany
R. Brent Tully
Affiliation:
University of Hawaii, Institute for Astronomy, 2680 Woodlawn Drive, HI 96822, USA
J. D. Neill
Affiliation:
California Institute of Technology, 1200 E. California Blvd. MC 278-17, Pasadena, CA 91125, USA
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In this study, we examine the effect of surface density of disks on chemical evolution of galaxies. We find that, higher surface brightness galaxies on average possess higher gas-phase metallicity compared to lower surface brightness galaxies with the same stellar and gas mass. The surface brightness effect is more significant for low-mass galaxies. Using an analytical model of chemical evolution involving gas outflow and accretion, we find that the surface brightness dependence can be attributed to the strength of inflowing pristine gas. Galaxies with lower surface brightness experience stronger inflow than galaxies with a higher surface brightness of a similar mass.

Type
Poster Papers
Copyright
Copyright © International Astronomical Union 2016 

References

Bigiel, F., & Blitz, L. 2012, ApJ, 756, 183 Google Scholar
Ellison, S. L., Patton, D. R., Simard, L., & McConnachie, A. W. 2008, ApJL, 672, 107 CrossRefGoogle Scholar
Kudritzki, R.-P., Ho, I.-T., Schruba, A., et al. 2015, MNRAS 450, 342 Google Scholar
Wright, E., Eisenhardt, P. R. M., Mainzer, A. K., et al. 2010, AJ, 140, 1868 CrossRefGoogle Scholar
Pilyugin, L. S., Grebel, E. K., & Kiniazev, A. Y. 2014, AJ, 147, 131 Google Scholar