SIMBAD references

2016MNRAS.460.1846Y - Mon. Not. R. Astron. Soc., 460, 1846-1853 (2016/August-1)

Confirming the intrinsic abundance spread in the globular cluster NGC 6273 (M19) with calcium triplet spectroscopy.


Abstract (from CDS):

We present metallicities for red giant stars in the globular cluster NGC 6273 based on intermediate resolution GMOS-S spectra of the calcium triplet region. For the 42 radial velocity members with reliable calcium triplet line strength measurements, we obtain metallicities, [Fe/H], using calibrations established from standard globular clusters. We confirm the presence of an intrinsic abundance dispersion identified by Johnson et al. The total range in [Fe/H] is ∼1.0 dex and after taking into account the measurement errors, the intrinsic abundance dispersion is σ_int[Fe/H]=0.17 dex. Among the Galactic globular clusters, the abundance dispersion in NGC 6273 is only exceeded by ω Cen, which is regarded as the remnant of a disrupted dwarf galaxy, and M54, which is the nuclear star cluster of the Sagittarius dwarf galaxy. If these three globular clusters share the same formation mechanism, then NGC 6273 may also be the remnant nucleus of a disrupted dwarf galaxy.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: abundances - stars: Population II - globular clusters: general - globular clusters: individual: NGC 6273 - globular clusters: individual: NGC 6273

Status at CDS : Large table(s) of objects being ingested in VizieR.

Simbad objects: 36

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