Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-28T02:46:00.810Z Has data issue: false hasContentIssue false
  • English
  • Français

Simulations of Cosmic Chemical Enrichment with Hypernova

Published online by Cambridge University Press:  21 April 2007

E. Emsellem ,
H. Wozniak ,
G. Massacrier ,
J.-F. Gonzalez ,
J. Devriendt ,
N. Champavert  and
C. Kobayashi
C. Kobayashi*
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka-shi, Tokyo 181-8588, Japan
*
[email protected]
Get access

Abstract

We simulate cosmic chemical enrichment with a hydrodynamical model including supernova and hypernova feedback.We find that the majority of stars in present-day massive galaxies formed in much smaller galaxies at high redshifts, despite their late assembly times. The hypernova feedback drives galactic outflows efficiently in low mass galaxies, and these winds eject heavy elements into the intergalactic medium. The ejected baryon fraction is larger for less massive galaxies, correlates well with stellar metallicity.The observed mass-metallicity relation is well reproduced as a result of the mass-dependent galactic winds.We also predict the cosmic supernova and gamma-ray burst rate histories.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 24: CRAL-2006. Chemodynamics: From First Stars to Local Galaxies , 2007 , pp. 245 - 250
Copyright
© EAS, EDP Sciences, 2007

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)