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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/27609
Title: A survey for dwarf galaxy remnants around 14 globular clusters in the outer halo
Authors: SOLLIMA, ANTONIO LUIGI 
Martínez Delgado, D.
Muñoz, R. R.
Carballo-Bello, J. A.
Valls-Gabaud, D.
Grebel, E. K.
Santana, F. A.
Côté, P.
Djorgovski, S. G.
Issue Date: 2018
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 476
Issue: 4
First Page: 4814
Abstract: 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 d<SUB>GC</SUB> > 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<SUB>V, lim</SUB> = 30-32 mag arcsec<SUP>-2</SUP>. 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.
URI: http://hdl.handle.net/20.500.12386/27609
URL: https://academic.oup.com/mnras/article/476/4/4814/4919626
ISSN: 0035-8711
DOI: 10.1093/mnras/sty539
Bibcode ADS: 2018MNRAS.476.4814S
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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