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s-Process elements in the M supergiant alpha Ori

Lundqvist, Martin LU and Wahlgren, Glenn LU (2005) In Nuclear Physics, Section A 758. p.304-307
Abstract
We present new results on a study of the weak s-process elemental abundances in the M supergiant alpha Ori (M2Iab). We have conducted the abundance analysis through comparison of synthetic with observed spectra in the two infrared spectral regions 0.7 - 1.1 mu m and 2.1 - 2.3 mu m, where the molecular and atomic line densities are less than in the optical region and where many of the relevant elements have strong tines. Our results show that there has been weak s-process production occurring during the life of the star and among the s-process elements is Sr the most, overabundant with 1.4 dex higher abundance than the sun. The abundance of Fe in alpha Ori is essentially solar. Other elements for which we have determined abundances are Rb,... (More)
We present new results on a study of the weak s-process elemental abundances in the M supergiant alpha Ori (M2Iab). We have conducted the abundance analysis through comparison of synthetic with observed spectra in the two infrared spectral regions 0.7 - 1.1 mu m and 2.1 - 2.3 mu m, where the molecular and atomic line densities are less than in the optical region and where many of the relevant elements have strong tines. Our results show that there has been weak s-process production occurring during the life of the star and among the s-process elements is Sr the most, overabundant with 1.4 dex higher abundance than the sun. The abundance of Fe in alpha Ori is essentially solar. Other elements for which we have determined abundances are Rb, Y and Zr. We compare our results to nuclear evolutionary stellar model calculations and discuss their relevance. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nuclear Physics, Section A
volume
758
pages
304 - 307
publisher
Elsevier
external identifiers
  • wos:000230660500065
  • scopus:20944431824
ISSN
0375-9474
DOI
10.1016/j.nuclphysa.2005.05.054
language
English
LU publication?
yes
id
6ca3e94f-a9fe-4712-92d3-f9c5cbb8c619 (old id 231980)
date added to LUP
2007-09-28 16:44:11
date last changed
2017-01-01 06:40:23
@article{6ca3e94f-a9fe-4712-92d3-f9c5cbb8c619,
  abstract     = {We present new results on a study of the weak s-process elemental abundances in the M supergiant alpha Ori (M2Iab). We have conducted the abundance analysis through comparison of synthetic with observed spectra in the two infrared spectral regions 0.7 - 1.1 mu m and 2.1 - 2.3 mu m, where the molecular and atomic line densities are less than in the optical region and where many of the relevant elements have strong tines. Our results show that there has been weak s-process production occurring during the life of the star and among the s-process elements is Sr the most, overabundant with 1.4 dex higher abundance than the sun. The abundance of Fe in alpha Ori is essentially solar. Other elements for which we have determined abundances are Rb, Y and Zr. We compare our results to nuclear evolutionary stellar model calculations and discuss their relevance.},
  author       = {Lundqvist, Martin and Wahlgren, Glenn},
  issn         = {0375-9474},
  language     = {eng},
  pages        = {304--307},
  publisher    = {Elsevier},
  series       = {Nuclear Physics, Section A},
  title        = {s-Process elements in the M supergiant alpha Ori},
  url          = {http://dx.doi.org/10.1016/j.nuclphysa.2005.05.054},
  volume       = {758},
  year         = {2005},
}