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

Abstract

Asymptotic Giant Branch 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 and/or Wolf-Rayet stars, are more important. Recent articles have proposed both Asymptotic Giant Branch stars as well as type II supernovae 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 $\mu$m HF molecular line observed with the spectrometer Phoenix. We compare the fluorine abundances with those of alpha elements mainly produced in type II supernovae and find that fluorine and the alpha-elements do not evolve in lock-step, ruling out type II supernovae 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 type II supernovae 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: Asymptotic Giant Branch stars and Wolf-Rayet stars.

Accepted for publication in ApJ

References in corpus (6)

• A strong case for fast stellar rotation at very low metallicities
• Effects of nuclear cross sections on ${}^{19}$F nucleosynthesis at low metallicities
• The Chemical Evolution of Fluorine in the Bulge - High-resolution K-band spectra of giants in three fields
• Fluorine in the solar neighborhood - is it all produced in AGB-stars?
• A new solar fluorine abundance and a fluorine determination in the two open clusters M 67 and NGC 6404
• Detection of Fluorine in the Halo Planetary Nebula BoBn 1: Evidence For a Binary Progenitor Star

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• Constraining $\nu$-Process Production of Fluorine through Cosmic Ray Nucleosynthesis
• Fluorine Abundances in the Galactic Disk
• Chemical Evolution of Fluorine in the Milky Way
• Fluorine Abundances in the Galactic Nuclear Star Cluster
• M Giants with IGRINS II. Chemical Evolution of Fluorine at High Metallicities
• The Lowest Broad Alpha Cluster Resonances in ${}^{19}$F
• First detection of AlF line emission towards M-type AGB stars
• Detection of fluorine in hot Extreme Helium Stars
• Exploring fluorine chemical evolution in the Galactic disk: the open cluster perspective
• Fluorine Abundances in Local Stellar Populations