Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Is sulphur a typical alpha element?

Ryde, Nils LU orcid ; Jönsson, Henrik LU orcid and Matrozis, Elvijs (2014) In Memorie della Societa Astronomica Italiana 85(269). p.269-271
Abstract
Observationally, the galactic chemical evolution of sulphur shows a complex pattern. Some studies find no correlation between [S/Fe] and [Fe/H] at halo metallcities, which is typical for alpha -elements, others find [S/Fe] increasing towards lower metallicities, and still others find a combination of the two. Each scenario has different implications for the Galactic chemical evolution of sulphur. Here, we briefly summarise our results \citep{henrik:11,matrozis:13} from investigations where we derive stellar sulphur abundances from the [SI] lambda1082 nm line, a atomic transition which hardly shows any departures from local thermodynamic equilibrium, or LTE. Our results argue for a chemical evolution of sulphur that is typical for alpha... (More)
Observationally, the galactic chemical evolution of sulphur shows a complex pattern. Some studies find no correlation between [S/Fe] and [Fe/H] at halo metallcities, which is typical for alpha -elements, others find [S/Fe] increasing towards lower metallicities, and still others find a combination of the two. Each scenario has different implications for the Galactic chemical evolution of sulphur. Here, we briefly summarise our results \citep{henrik:11,matrozis:13} from investigations where we derive stellar sulphur abundances from the [SI] lambda1082 nm line, a atomic transition which hardly shows any departures from local thermodynamic equilibrium, or LTE. Our results argue for a chemical evolution of sulphur that is typical for alpha -elements, contrary to some previous studies that have found high sulphur abundances ([S/Fe]gtrsim0 .6) for stars with -2.5<[Fe/H]<-1. (Less)
Please use this url to cite or link to this publication:
author
; and
organization
alternative title
Is sulphur a typical alpha element?
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Stars: abundances, Stars: atmospheres, Stars: Population II, Infrared: stars
in
Memorie della Societa Astronomica Italiana
volume
85
issue
269
article number
85
pages
3 pages
language
English
LU publication?
yes
id
20a0d39d-990f-4930-b546-61e04895b75d
date added to LUP
2016-09-14 10:00:24
date last changed
2021-03-22 17:54:59
@article{20a0d39d-990f-4930-b546-61e04895b75d,
  abstract     = {{Observationally, the galactic chemical evolution of sulphur shows a complex pattern. Some studies find no correlation between [S/Fe] and [Fe/H] at halo metallcities, which is typical for alpha -elements, others find [S/Fe] increasing towards lower metallicities, and still others find a combination of the two. Each scenario has different implications for the Galactic chemical evolution of sulphur. Here, we briefly summarise our results \citep{henrik:11,matrozis:13} from investigations where we derive stellar sulphur abundances from the [SI] lambda1082 nm line, a atomic transition which hardly shows any departures from local thermodynamic equilibrium, or LTE. Our results argue for a chemical evolution of sulphur that is typical for alpha -elements, contrary to some previous studies that have found high sulphur abundances ([S/Fe]gtrsim0 .6) for stars with -2.5&lt;[Fe/H]&lt;-1.}},
  author       = {{Ryde, Nils and Jönsson, Henrik and Matrozis, Elvijs}},
  keywords     = {{Stars: abundances; Stars: atmospheres; Stars: Population II; Infrared: stars}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{269}},
  pages        = {{269--271}},
  series       = {{Memorie della Societa Astronomica Italiana}},
  title        = {{Is sulphur a typical alpha element?}},
  volume       = {{85}},
  year         = {{2014}},
}