Discovery of tidal debris stars from G1/Mayall-II in M31

Michael D Gregg,Michael J West,Brian C Lemaux,Andreas H W Küpper

Monthly Notices of the Royal Astronomical Society（2021）

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摘要

The object Mayall II or G1 is the brightest globular cluster belonging to M31. Because of its extreme properties for a globular cluster, it has been speculated that G1 is the remnant nucleus of a dwarf galaxy that has been stripped by the tidal field of M31. Using the Keck DEIMOS spectrograph, we have conducted a survey for tidally stripped stars from G1, obtaining a sample of 351 stellar velociti...

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关键词

globular clusters: individual,galaxies: evolution,Local Group,galaxies: star clusters: individual

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