The evolution of carbon, sulphur and titanium isotopes from high redshift to the local Universe
Por:
Hughes G.L., Gibson B.K., Carigi L., Sánchez-Blázquez P., Chavez J.M., Lambert D.L.
Publicada:
11 nov 2008
Resumen:
Recent observations of carbon, sulphur and titanium isotopes at redshifts z similar to 1 and in the local stellar disc and halo have opened a new window into the study of isotopic abundance patterns and the origin of the chemical elements. Using our Galactic chemical evolution code GETOOL, we have examined the evolution of these isotopes within the framework of a Milky Way-like system. We have three aims in this work: first, to test the claim that novae are required, in order to explain the carbon isotope patterns in the Milky Way; secondly, to test the claim that sulphur isotope patterns at high redshift require an initial mass function (IMF) biased towards massive stars; and thirdly, to test extant chemical evolution models against new observations of titanium isotopes that suggest an anti-correlation between trace-to-dominant isotopes with metallicity. Based upon our dual-infall galactic chemical evolution modelling of a Milky Way-like system and the subsequent comparison with these
Filiaciones:
Hughes G.L.:
University of Central Lancashire, Centre for Astrophysics, Preston, PR1 2HE, United Kingdom
Gibson B.K.:
University of Central Lancashire, Centre for Astrophysics, Preston, PR1 2HE, United Kingdom
Carigi L.:
Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico
Sánchez-Blázquez P.:
University of Central Lancashire, Centre for Astrophysics, Preston, PR1 2HE, United Kingdom
Chavez J.M.:
University of Texas, Department of Astronomy, Austin, TX 78712, United States
Lambert D.L.:
University of Texas, Department of Astronomy, Austin, TX 78712, United States
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