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Major substructure in the M31 outer halo: The East Cloud

McMonigal, Brendan; Bate, N. F.; Conn, Anthony; Mackey, Dougal; Lewis, G F; Irwin, M. J.; Martin, N F; McConnachie, Alan W; Ferguson, A. M. N.; Ibata, Rodrigo A; Huxor, A


We present the first detailed analysis of the East Cloud, a highly disrupted diffuse stellar substructure in the outer halo of M31. The core of the substructure lies at a projected distance of ∼100 kpc from the centre of M31 in the outer halo, with possible extensions reaching right into the inner halo. Using Pan-Andromeda Archaeological Survey photometry of red giant branch stars, we measure the distance, metallicity and brightness of the cloud. Using Hubble Space Telescope data, we...[Show more]

CollectionsANU Research Publications
Date published: 2016
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/stv2690
Access Rights: Open Access


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