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Fluorine in the Sol...
Fluorine in the Solar Neighborhood : The Need for Several Cosmic Sources
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- Ryde, Nils (författare)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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- Jönsson, Henrik (författare)
- Malmö University,Lund University,Lunds universitet,Malmö universitet,Institutionen för materialvetenskap och tillämpad matematik (MTM),Lund Univ, Dept Astron & Theoret Phys, Lund Observ, Box 43, SE-22100 Lund, Sweden.,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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- Mace, Gregory (författare)
- Univ Texas Austin, Dept Astron, RLM 15308, Austin, TX 78712 USA.;Univ Texas Austin, McDonald Observ, Austin, TX 78712 USA.,University of Texas at Austin
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- Cunha, Katia (författare)
- Observ Nacl San CristOvao, Rio De Janeiro, Brazil.;Univ Arizona, Tucson, AZ 85719 USA.,University of Arizona,National Observatory Brazil
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- Spitoni, Emanuele (författare)
- Aarhus Univ, Stellar Astrophys Ctr, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus C, Denmark.,Aarhus University
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- Afsar, Melike (författare)
- Ege Univ, Dept Astron & Space Sci, TR-35100 Izmir, Turkey.,Ege University
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- Jaffe, Daniel (författare)
- Univ Texas Austin, Dept Astron, RLM 15308, Austin, TX 78712 USA.;Univ Texas Austin, McDonald Observ, Austin, TX 78712 USA.,University of Texas at Austin
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- Forsberg, Rebecca (författare)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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- Kaplan, Kyle F. (författare)
- Univ Space Res Assoc, SOFIA Sci Ctr, NASA, Ames Res Ctr, MS 232-12, Moffett Field, CA 94035 USA.,NASA Ames Research Center
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- Kidder, Benjamin T. (författare)
- Univ Texas Austin, Dept Astron, RLM 15308, Austin, TX 78712 USA.;Univ Texas Austin, McDonald Observ, Austin, TX 78712 USA.,University of Texas at Austin
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- Lee, Jae-Joon (författare)
- Korea Astron & Space Sci Inst, 776 Daedeok Daero, Daejeon 34055, South Korea.,Korea Astronomy and Space Science Institute (KASI)
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- Oh, Heeyoung (författare)
- Univ Texas Austin, Dept Astron, RLM 15308, Austin, TX 78712 USA.;Korea Astron & Space Sci Inst, 776 Daedeok Daero, Daejeon 34055, South Korea.,Korea Astronomy and Space Science Institute (KASI),University of Texas at Austin
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- Smith, Verne V. (författare)
- Natl Opt Astron Observ, Tucson, AZ 85719 USA.,National Optical Astronomy Observatory
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- Sneden, Christopher (författare)
- Univ Texas Austin, Dept Astron, RLM 15308, Austin, TX 78712 USA.;Univ Texas Austin, McDonald Observ, Austin, TX 78712 USA.,University of Texas at Austin
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- Sokal, Kimberly R. (författare)
- Univ Texas Austin, Dept Astron, RLM 15308, Austin, TX 78712 USA.;Univ Texas Austin, McDonald Observ, Austin, TX 78712 USA.,University of Texas at Austin
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- Strickland, Emily (författare)
- Univ Texas Austin, Dept Astron, RLM 15308, Austin, TX 78712 USA.;Univ Texas Austin, McDonald Observ, Austin, TX 78712 USA.,University of Texas at Austin
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- Thorsbro, Brian (författare)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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(creator_code:org_t)
- 2020-04-14
- 2020
- Engelska.
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Ingår i: Astrophysical Journal. - : Institute of Physics (IOP). - 0004-637X .- 1538-4357. ; 893:1
- Relaterad länk:
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https://iopscience.i...
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- The cosmic origin of fluorine is still not well constrained. Several nucleosynthetic channels at different phases of stellar evolution have been suggested, but these must be constrained by observations. For this, the fluorine abundance trend with metallicity spanning a wide range is required. Our aim is to determine stellar abundances of fluorine for -1.1 < [Fe H] < +0.4. We determine the abundances from HF lines in infrared K-band spectra ( 2.3 mm) of cool giants, observed with the IGRINS and Phoenix high-resolution spectrographs. We derive accurate stellar parameters for all our observed K giants, which is important as the HF lines are very temperaturesensitive. We find that [F/Fe] is flat as a function of metallicity at [ F/Fe]0, but increases as the metallicity increases. The fluorine slope shows a clear secondary behavior in this metallicity range. We also find that the [F/ Ce] ratio is relatively flat for -0.6 < [Fe H] < 0, and that for two metal-poor ([Fe H] < - 0.8), s-process element-enhanced giants, we do not detect an elevated fluorine abundance. We interpret all of these observational constraints as indications that several major processes are at play for the cosmic budget of fluorine over time: from those in massive stars at low metallicities, through the asymptotic giant branch star contribution at -0.6 < [Fe H] < 0, to processes with increasing yields with metallicity at supersolar metallicities. The origins of the latter, and whether or not Wolf-Rayet stars and/or novae could contribute at supersolar metallicities, is currently not known. To quantify these observational results, theoretical modeling is required. More observations in the metal-poor region are required to clarify the processes there.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
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Ryde, Nils
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Jönsson, Henrik
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Mace, Gregory
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Cunha, Katia
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Spitoni, Emanuel ...
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Afsar, Melike
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visa fler...
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Jaffe, Daniel
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Forsberg, Rebecc ...
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Kaplan, Kyle F.
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Kidder, Benjamin ...
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Lee, Jae-Joon
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Oh, Heeyoung
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Smith, Verne V.
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Sneden, Christop ...
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Sokal, Kimberly ...
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Strickland, Emil ...
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Thorsbro, Brian
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Malmö universitet
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Lunds universitet