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Mapping the tidally disrupting Andromeda XXVII and its stellar stream

Published online by Cambridge University Press:  21 March 2017

Janet Preston ,
Michelle Collins ,
Ana Bonaca ,
Rodrigo Ibata ,
Erik Tollerud ,
Marla Geha  and
the PAndAS collaboration
Janet Preston
Affiliation:
Department of Physics, University of Surrey, Guildford, GU2 7XH, Surrey, UK. email: j.preston@surrey.ac.uk
Michelle Collins
Affiliation:
Department of Physics, University of Surrey, Guildford, GU2 7XH, Surrey, UK
Ana Bonaca
Affiliation:
Astronomy Department, Yale University, New Haven, CT 06520, USA
Rodrigo Ibata
Affiliation:
Observatoire de Strasbourg, 11, rue de l’Université, F-67000, Strasbourg
Erik Tollerud
Affiliation:
Space Telescope Science Institute, Baltimore, MD 21218, U.S.A
Marla Geha
Affiliation:
Astronomy Department, Yale University, New Haven, CT 06520, USA
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Abstract

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Andromeda XXVII is a dwarf spheroidal galaxy in the outskirts of the Andromeda galaxy (M31). It appears to be dissolving in to the Northern arc of M31, and could be the remnant of a strong tidal disruption. In the upcoming months, our spectroscopic program, which has measured velocities for multiple stars within both the dwarf galaxy progenitor and its stream (using the Keck II DEIMOS telescope, as part of the PAndAS survey), will determine velocity dispersions, scale radii and metallicities of both the dwarf and the stream. This in turn may enable us to ascertain the progenitor mass profile and determine whether it is cusped or cored.

Keywords

galaxies: dwarfkinematics and dynamics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S321: Formation and Evolution of Galaxy Outskirts , March 2016 , pp. 46 - 47
Copyright
Copyright © International Astronomical Union 2017 

References

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