A Sr-rich star on the main sequence of ω centauri

Laura M. Stanford; G. S. Da Costa; John E. Norris; Russell D. Cannon

doi:10.1086/510530

A Sr-rich star on the main sequence of ω centauri

Laura M. Stanford^*, G. S. Da Costa, John E. Norris, Russell D. Cannon

^*Corresponding author for this work

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

5 Citations (Scopus)

Abstract

Abundance ratios relative to iron for carbon, nitrogen, strontium, and barium are presented for a metal-rich main-sequence star ([Fe/H] = -0.74) in the globular cluster ω Centauri. This star, designated 2015448, shows depleted carbon and solar nitrogen but, more interestingly, shows an enhanced abundance ratio of strontium [Sr/Fe] ≈1.6 dex, while the barium abundance ratio is [Ba/Fe] ≤ 0.6 dex. At this metallicity one usually sees strontium and barium abundance ratios that are roughly equal. Possible formation scenarios of this peculiar object are considered.

Original language	English
Pages (from-to)	L117-L120
Journal	Astrophysical Journal
Volume	653
Issue number	2 II
DOIs	https://doi.org/10.1086/510530
Publication status	Published - 20 Dec 2006

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@article{1bcad3676c9d4f739f5aacc55e350902,

title = "A Sr-rich star on the main sequence of ω centauri",

abstract = "Abundance ratios relative to iron for carbon, nitrogen, strontium, and barium are presented for a metal-rich main-sequence star ([Fe/H] = -0.74) in the globular cluster ω Centauri. This star, designated 2015448, shows depleted carbon and solar nitrogen but, more interestingly, shows an enhanced abundance ratio of strontium [Sr/Fe] ≈1.6 dex, while the barium abundance ratio is [Ba/Fe] ≤ 0.6 dex. At this metallicity one usually sees strontium and barium abundance ratios that are roughly equal. Possible formation scenarios of this peculiar object are considered.",

keywords = "Globular clusters: General, Globular clusters: Individual (ω Centauri)",

author = "Stanford, \{Laura M.\} and \{Da Costa\}, \{G. S.\} and Norris, \{John E.\} and Cannon, \{Russell D.\}",

year = "2006",

month = dec,

day = "20",

doi = "10.1086/510530",

language = "English",

volume = "653",

pages = "L117--L120",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2 II",

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TY - JOUR

T1 - A Sr-rich star on the main sequence of ω centauri

AU - Stanford, Laura M.

AU - Da Costa, G. S.

AU - Norris, John E.

AU - Cannon, Russell D.

PY - 2006/12/20

Y1 - 2006/12/20

N2 - Abundance ratios relative to iron for carbon, nitrogen, strontium, and barium are presented for a metal-rich main-sequence star ([Fe/H] = -0.74) in the globular cluster ω Centauri. This star, designated 2015448, shows depleted carbon and solar nitrogen but, more interestingly, shows an enhanced abundance ratio of strontium [Sr/Fe] ≈1.6 dex, while the barium abundance ratio is [Ba/Fe] ≤ 0.6 dex. At this metallicity one usually sees strontium and barium abundance ratios that are roughly equal. Possible formation scenarios of this peculiar object are considered.

AB - Abundance ratios relative to iron for carbon, nitrogen, strontium, and barium are presented for a metal-rich main-sequence star ([Fe/H] = -0.74) in the globular cluster ω Centauri. This star, designated 2015448, shows depleted carbon and solar nitrogen but, more interestingly, shows an enhanced abundance ratio of strontium [Sr/Fe] ≈1.6 dex, while the barium abundance ratio is [Ba/Fe] ≤ 0.6 dex. At this metallicity one usually sees strontium and barium abundance ratios that are roughly equal. Possible formation scenarios of this peculiar object are considered.

KW - Globular clusters: General

KW - Globular clusters: Individual (ω Centauri)

UR - https://www.scopus.com/pages/publications/33846342495

U2 - 10.1086/510530

DO - 10.1086/510530

M3 - Article

SN - 0004-637X

VL - 653

SP - L117-L120

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 II

ER -

A Sr-rich star on the main sequence of ω centauri

Abstract

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