NGC 5694: another extra-galactic globular cluster

A. Mucciarelli; M. Bellazzini; M. Catelan; P. Amigo; M. Correnti; C. Cortés; E. Dalessandro; V. D'Orazi

NGC 5694

another extra-galactic globular cluster

A. Mucciarelli, M. Bellazzini, M. Catelan, P. Amigo, M. Correnti, C. Cortés, E. Dalessandro, V. D'Orazi

Department of Physics and Astronomy

Research output: Contribution to journal › Article

Abstract

We discuss the chemical composition of six giant stars of the outer Halo globular cluster NGC5694, through the analysis of UVES@FLAMES high-resolution spectra. The cluster has an average iron content [Fe/H]=--1.83+-0.01, solar-scaled [alpha/Fe] ratios and a very low Ba abundance ([Ba/Fe]=--0.71+-0.06). These anomalous abundance patterns are different from those observed in other Halo globular clusters but similar to those of the metal-poor stars in typical dwarf spheroidal galaxies. These findings suggest an extra-galactic origin for NGC5694, likely from a dwarf spheroidal galaxy.

Original language	English
Pages (from-to)	244-247
Number of pages	4
Journal	Journal of the Italian Astronomical Society
Volume	84
Issue number	1
Publication status	Published - 2013

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http://sait.oat.ts.astro.it/MSAIt840113/

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title = "NGC 5694: another extra-galactic globular cluster",

abstract = "We discuss the chemical composition of six giant stars of the outer Halo globular cluster NGC5694, through the analysis of UVES@FLAMES high-resolution spectra. The cluster has an average iron content [Fe/H]=--1.83+-0.01, solar-scaled [alpha/Fe] ratios and a very low Ba abundance ([Ba/Fe]=--0.71+-0.06). These anomalous abundance patterns are different from those observed in other Halo globular clusters but similar to those of the metal-poor stars in typical dwarf spheroidal galaxies. These findings suggest an extra-galactic origin for NGC5694, likely from a dwarf spheroidal galaxy.",

author = "A. Mucciarelli and M. Bellazzini and M. Catelan and P. Amigo and M. Correnti and C. Cort{\'e}s and E. Dalessandro and V. D'Orazi",

year = "2013",

language = "English",

volume = "84",

pages = "244--247",

journal = "Journal of the Italian Astronomical Society",

issn = "1824-016X",

publisher = "Societa Astronomica Italiana",

number = "1",

}

TY - JOUR

T1 - NGC 5694

T2 - another extra-galactic globular cluster

AU - Mucciarelli, A.

AU - Bellazzini, M.

AU - Catelan, M.

AU - Amigo, P.

AU - Correnti, M.

AU - Cortés, C.

AU - Dalessandro, E.

AU - D'Orazi, V.

PY - 2013

Y1 - 2013

N2 - We discuss the chemical composition of six giant stars of the outer Halo globular cluster NGC5694, through the analysis of UVES@FLAMES high-resolution spectra. The cluster has an average iron content [Fe/H]=--1.83+-0.01, solar-scaled [alpha/Fe] ratios and a very low Ba abundance ([Ba/Fe]=--0.71+-0.06). These anomalous abundance patterns are different from those observed in other Halo globular clusters but similar to those of the metal-poor stars in typical dwarf spheroidal galaxies. These findings suggest an extra-galactic origin for NGC5694, likely from a dwarf spheroidal galaxy.

AB - We discuss the chemical composition of six giant stars of the outer Halo globular cluster NGC5694, through the analysis of UVES@FLAMES high-resolution spectra. The cluster has an average iron content [Fe/H]=--1.83+-0.01, solar-scaled [alpha/Fe] ratios and a very low Ba abundance ([Ba/Fe]=--0.71+-0.06). These anomalous abundance patterns are different from those observed in other Halo globular clusters but similar to those of the metal-poor stars in typical dwarf spheroidal galaxies. These findings suggest an extra-galactic origin for NGC5694, likely from a dwarf spheroidal galaxy.

M3 - Article

VL - 84

SP - 244

EP - 247

JO - Journal of the Italian Astronomical Society

JF - Journal of the Italian Astronomical Society

SN - 1824-016X

IS - 1

ER -