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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sty539.pdf | PDF editoriale | 4.6 MB | Adobe PDF | View/Open |
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