SIMBAD references

2018MNRAS.476.4814S - Mon. Not. R. Astron. Soc., 476, 4814-4829 (2018/June-1)

A survey for dwarf galaxy remnants around 14 globular clusters in the outer halo.

SOLLIMA A., MARTINEZ DELGADO D., MUNOZ R.R., CARBALLO-BELLO J.A., VALLS-GABAUD D., GREBEL E.K., SANTANA F.A., COTE P. and DJORGOVSKI S.G.

Abstract (from CDS):

We report the results of a systematic photometric survey of the peripheral regions of a sample of 14 globular clusters in the outer halo of the Milky Way at distances dGC > 25 kpc from the Galactic Centre. The survey is aimed at searching for the remnants of the host satellite galaxies where these clusters could originally have been formed before being accreted on to the Galactic halo. The limiting surface brightness varies within our sample, but reaches µ_V, lim_ = 30-32 mag arcsec–2. For only two globular clusters (NGC 7492 and Whiting 1; already suggested to be associated with the Sagittarius galaxy), we detect extended stellar populations that cannot be associated with either the clusters themselves or with the surrounding Galactic field population. We show that the lack of substructures around globular clusters at these Galactocentric distances is still compatible with the predictions of cosmological simulations whereby in the outer halo the Galactic globular cluster system is built up through hierarchical accretion at early epochs.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: observational - techniques: photometric - stars: Population II - globular clusters: general - Galaxy: halo - Galaxy: structure

Status at CDS:  

Simbad objects: 24

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2020.06.01-07:39:26

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