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Globular Clusters Lost by the Sagittarius Dwarf Spheroidal Galaxy

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arxiv 2105.09850 v1 pith:MZCK2HID submitted 2021-05-20 astro-ph.GA

N. R. Arakelyan , S. V. Pilipenko , M. E. Sharina This is my paper · ORCID
classification astro-ph.GA
keywords clustersglobularstreamsagittariusterzantidalanalysisbelonging
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In this work a search was carried out for globular clusters belonging to the Sagittarius (Sgr) tidal stream using the analysis of spatial positions, radial velocities relative to the Galactic Standard of Rest (V_{GSR}),proper motions and ratio of "age -- metallicity" ([Fe/H]) for globular clusters and for stars in the tidal stream. As a result, three categories of globular clusters were obtained: A -- most certainly in the stream: Terzan 8, Whiting 1, Arp 2, NGC 6715, Terzan 7, Pal 12; B -- kinematic outliers: Pal 5, NGC 5904, NGC 5024, NGC 5053, NGC 5272, NGC 288; C -- lowest rank candidates: NGC 6864, NGC 5466, NGC 5897, NGC 7492, NGC 4147.

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  1. Neighbors, Not Kin: Kinematic evidence for tidal tails from NGC 7492 along the Sagittarius stream

    astro-ph.GA 2026-07 accept novelty 6.0 of 10

    GIRAFFE radial velocities and metallicities confirm NGC 7492 tidal tails extending ≥1.8 deg, kinematically and chemically distinct from the overlapping Sagittarius stream.

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