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Title: A radial velocity survey of low Galactic latitude structures - III. The Monoceros Ring in front of the Carina and Andromeda galaxies
Authors: Martin, N. F.
Ibata, R. A.
Martin, N. F.
Irwin, M. J.
Conn, B. C.
Lewis, G. F.
Bellazzini, M.
Chapman, S.
Tanvir, N.
First Published: 1-Mar-2006
Publisher: Royal Astronomical Society (RAS)
Citation: Monthly Notices of the Royal Astronomical Society: LETTERS, 2006, 367 (1)
Abstract: As part of our radial velocity survey of low Galactic latitude structures that surround the Galactic disc, we report the detection of the so-called Monoceros Ring in the foreground of the Carina dwarf galaxy at Galactic coordinates (l, b) = (260°, −22°) based on Very Large Telescope/Fibre Large Array Multi Element Spectrograph observations of the dwarf galaxy. At this location, 20° in longitude greater than previous detections, the Ring has a mean radial velocity of 145 ± 5 km s−1 and a velocity dispersion of only 17 ± 5 km s−1. Based on Keck/Deep Imaging Multi-Object Spectrograph observations, we also determine that the Ring has a mean radial velocity of −75 ± 4 km s−1 in the foreground of the Andromeda galaxy at (l, b) ∼ (122°, −22°), along with a velocity dispersion of 26 ± 3 km s−1. These two kinematic detections are both highly compatible with known characteristics of the structure and, along with previous detections, provide radial velocity values of the Ring over the 120° < l < 260° range. This should place strong constraints on numerical models of the accretion of the dwarf galaxy that is believed to be the progenitor of the Ring.
DOI Link: 10.1111/j.1745-3933.2006.00142.x
ISSN: 1745-3933
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2006 the authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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