The chemical composition of the low-mass Galactic globular cluster NGC 6362

D. Massari; A. Mucciarelli; E. Dalessandro; M. Bellazzini; S. Cassisi; G. Fiorentino; R. A. Ibata; C. Lardo; M. Salaris

doi:10.1093/mnras/stx549

The chemical composition of the low-mass Galactic globular cluster NGC 6362

D. Massari
, A. Mucciarelli
, E. Dalessandro
, M. Bellazzini
, S. Cassisi
, G. Fiorentino
, R. A. Ibata
, C. Lardo
, M. Salaris

Astronomy

Research output: Contribution to journal › Article › Academic › peer-review

37 Citations (Scopus)

243 Downloads (Pure)

Abstract

We present chemical abundances for 17 elements in a sample of 11 red giant branch stars in NGC 6362 from UVES spectra. NGC 6362 is one of the least massive globulars where multiple populations have been detected, yet its detailed chemical composition has not been investigated so far. NGC 6362 turns out to be a metal-intermediate ([Fe/H] = -1.07 ± 0.01 dex) cluster, with its α-peak and Fe-peak elements content compatible with that observed in clusters with similar metallicity. It also displays an enhancement in its s-process element abundances. Among the light elements involved in the multiple populations phenomenon, only [Na/Fe] shows star-to-star variations, while [Al/Fe] and [Mg/Fe] do not show any evidence for abundance spreads. A differential comparison with M4, a globular cluster with similar mass and metallicity, reveals that the two clusters share the same chemical composition. This finding suggests that NGC 6362 is indeed a regular cluster, formed from gas that has experienced the same chemical enrichment of other clusters with similar metallicity.

Original language	English
Pages (from-to)	1249-1258
Journal	Monthly Notices of the Royal Astronomical Society
Volume	468
Issue number	1
DOIs	https://doi.org/10.1093/mnras/stx549
Publication status	Published - Jun-2017

Keywords

techniques: spectroscopic
stars: abundances
globular clusters: individual: (NGC 6362)
FIELD STARS
S-ELEMENTS
STAR ABUNDANCE VARIATIONS
MULTIPLE STELLAR POPULATIONS
MILKY-WAY SATELLITES
GIANT BRANCH STARS
METAL-POOR STARS
UV LEGACY SURVEY
47 TUCANAE
BRIGHT GIANTS

Access to Document

10.1093/mnras/stx549

The chemical composition of the low-mass GalacticFinal publisher's version, 768 KBLicence: Unspecified

http://adsabs.harvard.edu/abs/2017MNRAS.468.1249M

Handle.net

Persistent link

Cite this

@article{c9418bbaef5847f6b7a4f3863c39e248,

title = "The chemical composition of the low-mass Galactic globular cluster NGC 6362",

abstract = "We present chemical abundances for 17 elements in a sample of 11 red giant branch stars in NGC 6362 from UVES spectra. NGC 6362 is one of the least massive globulars where multiple populations have been detected, yet its detailed chemical composition has not been investigated so far. NGC 6362 turns out to be a metal-intermediate ([Fe/H] = -1.07 ± 0.01 dex) cluster, with its α-peak and Fe-peak elements content compatible with that observed in clusters with similar metallicity. It also displays an enhancement in its s-process element abundances. Among the light elements involved in the multiple populations phenomenon, only [Na/Fe] shows star-to-star variations, while [Al/Fe] and [Mg/Fe] do not show any evidence for abundance spreads. A differential comparison with M4, a globular cluster with similar mass and metallicity, reveals that the two clusters share the same chemical composition. This finding suggests that NGC 6362 is indeed a regular cluster, formed from gas that has experienced the same chemical enrichment of other clusters with similar metallicity.",

keywords = "techniques: spectroscopic, stars: abundances, globular clusters: individual: (NGC 6362), FIELD STARS, S-ELEMENTS, STAR ABUNDANCE VARIATIONS, MULTIPLE STELLAR POPULATIONS, MILKY-WAY SATELLITES, GIANT BRANCH STARS, METAL-POOR STARS, UV LEGACY SURVEY, 47 TUCANAE, BRIGHT GIANTS",

author = "D. Massari and A. Mucciarelli and E. Dalessandro and M. Bellazzini and S. Cassisi and G. Fiorentino and Ibata, \{R. A.\} and C. Lardo and M. Salaris",

year = "2017",

month = jun,

doi = "10.1093/mnras/stx549",

language = "English",

volume = "468",

pages = "1249--1258",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "1",

}

TY - JOUR

T1 - The chemical composition of the low-mass Galactic globular cluster NGC 6362

AU - Massari, D.

AU - Mucciarelli, A.

AU - Dalessandro, E.

AU - Bellazzini, M.

AU - Cassisi, S.

AU - Fiorentino, G.

AU - Ibata, R. A.

AU - Lardo, C.

AU - Salaris, M.

PY - 2017/6

Y1 - 2017/6

N2 - We present chemical abundances for 17 elements in a sample of 11 red giant branch stars in NGC 6362 from UVES spectra. NGC 6362 is one of the least massive globulars where multiple populations have been detected, yet its detailed chemical composition has not been investigated so far. NGC 6362 turns out to be a metal-intermediate ([Fe/H] = -1.07 ± 0.01 dex) cluster, with its α-peak and Fe-peak elements content compatible with that observed in clusters with similar metallicity. It also displays an enhancement in its s-process element abundances. Among the light elements involved in the multiple populations phenomenon, only [Na/Fe] shows star-to-star variations, while [Al/Fe] and [Mg/Fe] do not show any evidence for abundance spreads. A differential comparison with M4, a globular cluster with similar mass and metallicity, reveals that the two clusters share the same chemical composition. This finding suggests that NGC 6362 is indeed a regular cluster, formed from gas that has experienced the same chemical enrichment of other clusters with similar metallicity.

AB - We present chemical abundances for 17 elements in a sample of 11 red giant branch stars in NGC 6362 from UVES spectra. NGC 6362 is one of the least massive globulars where multiple populations have been detected, yet its detailed chemical composition has not been investigated so far. NGC 6362 turns out to be a metal-intermediate ([Fe/H] = -1.07 ± 0.01 dex) cluster, with its α-peak and Fe-peak elements content compatible with that observed in clusters with similar metallicity. It also displays an enhancement in its s-process element abundances. Among the light elements involved in the multiple populations phenomenon, only [Na/Fe] shows star-to-star variations, while [Al/Fe] and [Mg/Fe] do not show any evidence for abundance spreads. A differential comparison with M4, a globular cluster with similar mass and metallicity, reveals that the two clusters share the same chemical composition. This finding suggests that NGC 6362 is indeed a regular cluster, formed from gas that has experienced the same chemical enrichment of other clusters with similar metallicity.

KW - techniques: spectroscopic

KW - stars: abundances

KW - globular clusters: individual: (NGC 6362)

KW - FIELD STARS

KW - S-ELEMENTS

KW - STAR ABUNDANCE VARIATIONS

KW - MULTIPLE STELLAR POPULATIONS

KW - MILKY-WAY SATELLITES

KW - GIANT BRANCH STARS

KW - METAL-POOR STARS

KW - UV LEGACY SURVEY

KW - 47 TUCANAE

KW - BRIGHT GIANTS

U2 - 10.1093/mnras/stx549

DO - 10.1093/mnras/stx549

M3 - Article

SN - 0035-8711

VL - 468

SP - 1249

EP - 1258

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

The chemical composition of the low-mass Galactic globular cluster NGC 6362

Abstract

Keywords

Access to Document

Handle.net

Fingerprint

Cite this