SwePub
Sök i LIBRIS databas

  Extended search

onr:"swepub:oai:DiVA.org:su-228904"
 

Search: onr:"swepub:oai:DiVA.org:su-228904" > Multiple population...

  • 1 of 1
  • Previous record
  • Next record
  •    To hitlist
  • Usman, Sam A. (author)

Multiple populations and a CH star found in the 300S globular cluster stellar stream

  • Article/chapterEnglish2024

Publisher, publication year, extent ...

  • 2024
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-228904
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-228904URI
  • https://doi.org/10.1093/mnras/stae185DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Milky Way globular clusters (GCs) display chemical enrichment in a phenomenon called multiple stellar populations (MSPs). While the enrichment mechanism is not fully understood, there is a correlation between a cluster’s mass and the fraction of enriched stars found therein. However, present-day GC masses are often smaller than their masses at the time of formation due to dynamical mass-loss. In this work, we explore the relationship between mass and MSPs using the stellar stream 300S. We present the chemical abundances of eight red giant branch member stars in 300S with high-resolution spectroscopy from Magellan/MIKE. We identify one enriched star characteristic of MSPs and no detectable metallicity dispersion, confirming that the progenitor of 300S was a GC. The fraction of enriched stars (12.5 per cent) observed in our 300S stars is less than the 50 per cent of stars found enriched in Milky Way GCs of comparable present-day mass (∼104.5 M⊙⁠). We calculate the mass of 300S’s progenitor and compare it to the initial masses of intact GCs, finding that 300S aligns well with the trend between the system mass at formation and enrichment. 300S’s progenitor may straddle the critical mass threshold for the formation of MSPs and can therefore serve as a benchmark for the stellar enrichment process. Additionally, we identify a CH star, with high abundances of s-process elements, probably accreted from a binary companion. The rarity of such binaries in intact GCs may imply stellar streams permit the survival of binaries that would otherwise be disrupted.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Ji, Alexander P. (author)
  • Li, Ting S. (author)
  • Pace, Andrew B. (author)
  • Cullinane, Lara R. (author)
  • Da Costa, Gary S. (author)
  • Koposov, Sergey E. (author)
  • Lewis, Geraint F. (author)
  • Zucker, Daniel B. (author)
  • Belokurov, Vasily (author)
  • Bland-Hawthorn, Joss (author)
  • Ferguson, Peter S. (author)
  • Thidemann Hansen, Terese,1983-Stockholms universitet,Institutionen för astronomi(Swepub:su)teha2005 (author)
  • Limberg, Guilherme (author)
  • Martell, Sarah L. (author)
  • Mckenzie, Madeleine (author)
  • Simon, Joshua D. (author)
  • Stockholms universitetInstitutionen för astronomi (creator_code:org_t)

Related titles

  • In:Monthly notices of the Royal Astronomical Society529:3, s. 2413-24270035-87111365-2966

Internet link

Find in a library

To the university's database

  • 1 of 1
  • Previous record
  • Next record
  •    To hitlist

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view