Malmö University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Adding the s-Process Element Cerium to the APOGEE Survey: Identification and Characterization of Ce II Lines in the H-band Spectral Window
Univ Arizona, Tucson, AZ 85719 USA.;Observ Nacl, Rio De Janeiro, Brazil..ORCID iD: 0000-0001-6476-0576
Natl Opt Astron Observ, Tucson, AZ 85719 USA..ORCID iD: 0000-0002-0134-2024
New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA..
Observ Nacl, Rio De Janeiro, Brazil..ORCID iD: 0000-0002-7883-5425
Show others and affiliations
2017 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 844, no 2, article id 145Article in journal (Refereed) Published
Abstract [en]

Nine Ce II lines have been identified and characterized within the spectral window observed by the Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey (between lambda 1.51 and 1.69 mu m). At solar metallicities, cerium is an element that is produced predominantly as a result of the slow capture of neutrons (the s-process) during asymptotic giant branch stellar evolution. The Ce II lines were identified using a combination of a high-resolution (R = lambda/delta lambda = 100,000) Fourier Transform Spectrometer (FTS) spectrum of a Boo and an APOGEE spectrum (R. =. 22,400) of a metal-poor, but s-process enriched, red giant (2M16011638-1201525). Laboratory oscillator strengths are not available for these lines. Astrophysical gf-values were derived using alpha Boo as a standard star, with the absolute cerium abundance in alpha Boo set by using optical Ce II lines that have precise published laboratory gf-values. The near-infrared Ce II lines identified here are also analyzed, as consistency checks, in a small number of bright red giants using archival FTS spectra, as well as a small sample of APOGEE red giants, including two members of the open cluster NGC 6819, two field stars, and seven metal-poor N-and Al-rich stars. The conclusion is that this set of Ce II lines can be detected and analyzed in a large fraction of the APOGEE red giant sample and will be useful for probing chemical evolution of the s-process products in various populations of the Milky Way.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2017. Vol. 844, no 2, article id 145
Keywords [en]
stars: abundances
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:mau:diva-65211DOI: 10.3847/1538-4357/aa7bebISI: 000406652900023Scopus ID: 2-s2.0-85027328996OAI: oai:DiVA.org:mau-65211DiVA, id: diva2:1829605
Available from: 2024-01-19 Created: 2024-01-19 Last updated: 2024-01-19Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records

Jönsson, Henrik

Search in DiVA

By author/editor
Cunha, KatiaSmith, Verne V.Souto, DiogoShetrone, Matthew D.Allende Prieto, CarlosBizyaev, DmitryFrinchaboy, PeterHoltzman, JonJönsson, HenrikNidever, DavidSchiavon, Ricardo P.Sobeck, JenniferZamora, OlgaZasowski, Gail
In the same journal
Astrophysical Journal
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 44 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf