Skip navigation
  • INAF logo
  • Home
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects
  • Explore by
    • Research outputs
    • Researchers
    • Organization units
    • Projects
  • Login:
    • My DSpace
    • Receive email
      updates
    • Edit Account details
  • Italian
  • English

  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31677
Title: Gaia-ESO Survey: Detailed elemental abundances in red giants of the peculiar globular cluster NGC 1851
Authors: Tautvaisiene, G.
Drazdauskas, A.
BRAGAGLIA, Angela 
Martell, S. L.
PANCINO, ELENA 
Lardo, C.
Mikolaitis, S.
Minkeviciute, R.
Stonkute, E.
Ambrosch, M.
Bagdonas, V.
Chorniy, Y.
SANNA, Nicoletta 
FRANCIOSINI, Elena 
Smiljanic, R.
RANDICH, Maria Sofia 
Gilmore, G.
Bensby, T.
Bergemann, M.
Gonneau, A.
Guiglion, G.
Carraro, G.
Heiter, U.
Korn, A.
MAGRINI, LAURA 
MORBIDELLI, LORENZO 
ZAGGIA, Simone 
Issue Date: 2022
Journal: ASTRONOMY & ASTROPHYSICS 
Number: 658
First Page: A80
Abstract: Context. NGC 1851 is one of several globular clusters for which multiple stellar populations of the subgiant branch have been clearly identified and a difference in metallicity detected. A crucial piece of information on the formation history of this cluster can be provided by the sum of A(C+N+O) abundances. However, these values have lacked a general consensus thus far. The separation of the subgiant branch can be based on age and/or A(C+N+O) abundance differences. Aims. Our main aim was to determine carbon, nitrogen, and oxygen abundances for evolved giants in the globular cluster NGC1851 in order to check whether or not the double populations of stars are coeval. Methods. High-resolution spectra, observed with the FLAMES-UVES spectrograph on the ESO VLT telescope, were analysed using a differential model atmosphere method. Results. We provide abundances of up to 29 chemical elements for a sample of 45 giants in NGC 1851. The investigated stars can be separated into two populations with a difference of 0.07 dex in the mean metallicity, 0.3 dex in the mean C/N, and 0.35 dex in the mean s-process dominated element-to-iron abundance ratios [s/Fe]. No significant difference was determined in the mean values of A(C+N+O) as well as in abundance to iron ratios of carbon, alpha- and iron-peak-elements, and of europium. Conclusions. As the averaged A(C+N+O) values between the two populations do not differ, additional evidence is given that NGC 1851 is composed of two clusters, the metal-rich cluster being by about 0.6 Gyr older than the metal-poor one. A global overview of NGC 1851 properties and the detailed abundances of chemical elements favour its formation in a dwarf spheroidal galaxy that was accreted by the Milky Way.
URI: http://hdl.handle.net/20.500.12386/31677
URL: https://www.aanda.org/articles/aa/abs/2022/02/aa42234-21/aa42234-21.html
ISSN: 0004-6361
DOI: 10.1051/0004-6361/202142234
Bibcode ADS: 2022A&A...658A..80T
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat
2022_A+A_658_A80.pdfPdf editoriale879.5 kBAdobe PDFView/Open
Show full item record

Page view(s)

7
checked on Jun 24, 2022

Download(s)

1
checked on Jun 24, 2022

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are published in Open Access, unless otherwise indicated.


Explore by
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects

Informazioni e guide per autori

https://openaccess-info.inaf.it: tutte le informazioni sull'accesso aperto in INAF

Come si inserisce un prodotto: le guide a OA@INAF

La Policy INAF sull'accesso aperto

Documenti e modelli scaricabili

Feedback
Built with DSpace-CRIS - Extension maintained and optimized by Logo 4SCIENCE