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Fluorine in the Solar neighborhood : No evidence for the neutrino process

Jönsson, H. LU ; Ryde, N. LU ; Spitoni, E.; Matteucci, F.; Cunha, K.; Smith, V. V.; Hinkle, K H and Schultheis, M. (2017) In Astrophysical Journal 835(1).
Abstract

Asymptotic giant branch (AGB) stars are known to produce "cosmic" fluorine, but it is uncertain whether these stars are the main producers of fluorine in the solar neighborhood or if any of the other proposed formation sites, Type II supernovae (SNe II) and/or Wolf-Rayet (W-R) stars, are more important. Recent articles have proposed both AGB stars and SNe II as the dominant sources of fluorine in the solar neighborhood. In this paper we set out to determine the fluorine abundance in a sample of 49 nearby, bright K giants for which we previously have determined the stellar parameters, as well as alpha abundances homogeneously from optical high-resolution spectra. The fluorine abundance is determined from a 2.3 μm HF molecular line... (More)

Asymptotic giant branch (AGB) stars are known to produce "cosmic" fluorine, but it is uncertain whether these stars are the main producers of fluorine in the solar neighborhood or if any of the other proposed formation sites, Type II supernovae (SNe II) and/or Wolf-Rayet (W-R) stars, are more important. Recent articles have proposed both AGB stars and SNe II as the dominant sources of fluorine in the solar neighborhood. In this paper we set out to determine the fluorine abundance in a sample of 49 nearby, bright K giants for which we previously have determined the stellar parameters, as well as alpha abundances homogeneously from optical high-resolution spectra. The fluorine abundance is determined from a 2.3 μm HF molecular line observed with the spectrometer Phoenix. We compare the fluorine abundances with those of alpha-elements mainly produced in SNe II and find that fluorine and the alpha-elements do not evolve in lockstep, ruling out SNe II as the dominating producers of fluorine in the solar neighborhood. Furthermore, we find a secondary behavior of fluorine with respect to oxygen, which is another evidence against the SNe II playing a large role in the production of fluorine in the solar neighborhood. This secondary behavior of fluorine will put new constraints on stellar models of the other two suggested production sites: AGB stars and W-R stars.

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organization
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type
Contribution to journal
publication status
published
subject
keywords
Galaxy: abundances, solar neighborhood, stars: abundances
in
Astrophysical Journal
volume
835
issue
1
publisher
University of Chicago Press
external identifiers
  • scopus:85011303912
  • wos:000393455400050
ISSN
0004-637X
DOI
10.3847/1538-4357/835/1/50
language
English
LU publication?
yes
id
2256a309-4910-41ba-98ed-52693cfea81b
date added to LUP
2017-02-15 08:46:58
date last changed
2018-01-07 11:49:52
@article{2256a309-4910-41ba-98ed-52693cfea81b,
  abstract     = {<p>Asymptotic giant branch (AGB) stars are known to produce "cosmic" fluorine, but it is uncertain whether these stars are the main producers of fluorine in the solar neighborhood or if any of the other proposed formation sites, Type II supernovae (SNe II) and/or Wolf-Rayet (W-R) stars, are more important. Recent articles have proposed both AGB stars and SNe II as the dominant sources of fluorine in the solar neighborhood. In this paper we set out to determine the fluorine abundance in a sample of 49 nearby, bright K giants for which we previously have determined the stellar parameters, as well as alpha abundances homogeneously from optical high-resolution spectra. The fluorine abundance is determined from a 2.3 μm HF molecular line observed with the spectrometer Phoenix. We compare the fluorine abundances with those of alpha-elements mainly produced in SNe II and find that fluorine and the alpha-elements do not evolve in lockstep, ruling out SNe II as the dominating producers of fluorine in the solar neighborhood. Furthermore, we find a secondary behavior of fluorine with respect to oxygen, which is another evidence against the SNe II playing a large role in the production of fluorine in the solar neighborhood. This secondary behavior of fluorine will put new constraints on stellar models of the other two suggested production sites: AGB stars and W-R stars.</p>},
  articleno    = {50},
  author       = {Jönsson, H. and Ryde, N. and Spitoni, E. and Matteucci, F. and Cunha, K. and Smith, V. V. and Hinkle, K H and Schultheis, M.},
  issn         = {0004-637X},
  keyword      = {Galaxy: abundances,solar neighborhood,stars: abundances},
  language     = {eng},
  month        = {01},
  number       = {1},
  publisher    = {University of Chicago Press},
  series       = {Astrophysical Journal},
  title        = {Fluorine in the Solar neighborhood : No evidence for the neutrino process},
  url          = {http://dx.doi.org/10.3847/1538-4357/835/1/50},
  volume       = {835},
  year         = {2017},
}