Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/30119
Title: | Identification of the long stellar stream of the prototypical massive globular cluster ω Centauri | Authors: | Ibata, Rodrigo A. BELLAZZINI, Michele Malhan, Khyati Martin, Nicolas Bianchini, Paolo |
Issue Date: | 2019 | Journal: | NATURE ASTRONOMY | Number: | 3 | First Page: | 667 | Abstract: | Omega Centauri (ω Cen) is the Milky Way's most massive globular cluster, and has long been suspected of being the remnant core of an accreted dwarf galaxy. If this scenario is correct, ω Cen should be tidally limited and tidal debris should be spread along its orbit. Here we use N-body simulations to show that the recently discovered `Fimbulthul' structure is the long-sought-for tidal stream of ω Cen, extending up to 28° from the cluster. Follow-up high-resolution spectroscopy of five stream stars shows that they are closely grouped in velocity, and have metallicities consistent with having originated in that cluster. Informed by our N-body simulations, we devise a selection filter that we apply to Gaia mission data to also uncover the stream in the highly contaminated and crowded field within 10° of ω Cen. Further modelling of the stream may help to constrain the dynamical history of the dwarf galaxy progenitor of this disrupting system and guide future searches for its remnant stars in the Milky Way. | URI: | http://hdl.handle.net/20.500.12386/30119 | URL: | https://www.nature.com/articles/s41550-019-0751-x https://arxiv.org/pdf/1902.09544.pdf |
ISSN: | 2397-3366 | DOI: | 10.1038/s41550-019-0751-x | Bibcode ADS: | 2019NatAs...3..667I | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
preprint 1902.09544.pdf | preprint | 1.65 MB | Adobe PDF | View/Open |
s41550-019-0751-x.pdf | [Administrators only] | 2.71 MB | Adobe PDF |
Page view(s)
53
checked on Apr 27, 2024
Download(s)
19
checked on Apr 27, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.