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The Magellanic Inter-Cloud Project (MAGIC) III: First spectroscopic evidence of a dwarf stripping a dwarf

Carrera, Ricardo, Conn, Blair C., Noel, Noelia, Read, Justin and Sánchez, Ángel R López (2017) The Magellanic Inter-Cloud Project (MAGIC) III: First spectroscopic evidence of a dwarf stripping a dwarf Monthly Notices of the Royal Astronomical Society.

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Abstract

The Magellanic Bridge (MB) is a gaseous stream that links the Large (LMC) and Small (SMC) Magellanic Clouds. Current simulations suggest that the MB forms from a recent interaction between the Clouds. In this scenario, the MB should also have an associated stellar bridge formed by stars tidally stripped from the SMC by the LMC. There are several observational evidences for these stripped stars, from the presence of intermediate age populations in the MB and carbon stars, to the recent observation of an over-density of RR Lyrae stars offset from the MB. However, spectroscopic confirmation of stripped stars in the MB remains lacking. In this paper, we use medium resolution spectra to derive the radial velocities and metallicities of stars in two fields along the MB. We show from both their chemistry and kinematics that the bulk of these stars must have been tidally stripped from the SMC. This is the first spectroscopic evidence for a dwarf galaxy being tidally stripped by a larger dwarf.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Carrera, RicardoUNSPECIFIEDUNSPECIFIED
Conn, Blair C.UNSPECIFIEDUNSPECIFIED
Noel, Noelian.noel@surrey.ac.ukUNSPECIFIED
Read, Justinj.read@surrey.ac.ukUNSPECIFIED
Sánchez, Ángel R LópezUNSPECIFIEDUNSPECIFIED
Date : 28 July 2017
Identification Number : 10.1093/mnras/stx1932
Copyright Disclaimer : © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
Uncontrolled Keywords : Galaxies: interactions; Local Group; Magellanic Clouds
Depositing User : Clive Harris
Date Deposited : 15 Aug 2017 13:17
Last Modified : 15 Aug 2017 13:40
URI: http://epubs.surrey.ac.uk/id/eprint/841921

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