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/20.500.12386/29180
Title: Hubble Space Telescope analysis of stellar populations within the globular cluster G1 (Mayall II) in M 31
Authors: Nardiello, D.
Piotto, G.
Milone, A. P.
Rich, R. M.
CASSISI, Santi 
BEDIN, Luigi 
Bellini, A.
Renzini, A.
Issue Date: 2019
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 485
Issue: 3
First Page: 3076
Abstract: In this paper, we present a multiwavelength analysis of the complex stellar populations within the massive globular cluster Mayall II (G1), a satellite of the nearby Andromeda galaxy projected at a distance of 40 kpc. We used images collected with the Hubble Space Telescope in UV, blue and optical filters to explore the multiple stellar populations hosted by G1. The m<SUB>F438W</SUB> versus m<SUB>F438W</SUB> - m<SUB>F606W</SUB> colour-magnitude diagram shows a significant spread of the red giant branch, that divides 1 mag brighter than the red clump. A possible explanation is the presence of two populations with different iron abundance or different C+N+O content, or different helium content, or a combination of the three causes. A similar red giant branch split is observed also for the Galactic globular cluster NGC 6388. Our multiwavelength analysis gives also the definitive proof that G1 hosts stars located on an extended blue horizontal branch. The horizontal branch of G1 exhibits similar morphology as those of NGC 6388 and NGC 6441, which host stellar populations with extreme helium abundance (Y > 0.33). As a consequence, we suggest that G1 may also exhibit large star-to-star helium variations.
URI: http://hdl.handle.net/20.500.12386/29180
URL: https://academic.oup.com/mnras/article/485/3/3076/5369634
ISSN: 0035-8711
DOI: 10.1093/mnras/stz629
Bibcode ADS: 2019MNRAS.485.3076N
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat 
1903.00488.pdfpreprint4.49 MBAdobe PDFView/Open
stz629.pdfpdf editoriale5.54 MBAdobe PDFView/Open
Show full item record

Page view(s)

5
checked on Jan 19, 2021

Download(s)

1
checked on Jan 19, 2021

Google ScholarTM

Check

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