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Fourteen candidate RR Lyrae star streams in the inner Galaxy

Mateu, Cecilia, Read, Justin I and Kawata, Daisuke (2017) Fourteen candidate RR Lyrae star streams in the inner Galaxy Monthly Notices of the Royal Astronomical Society, 474 (3). pp. 4112-4129.

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Abstract

We apply the GC3 stream-finding method to RR Lyrae stars (RRLSs) in the Catalina survey. We find 2 RRLS stream candidates at >4σ confidence and another 12 at >3.5σ confidence over the Galactocentric distance range 4 < D/kpc < 26. Of these, only two are associated with known globular clusters (NGC 1261 and Arp2). The remainder are candidate `orphan' streams, consistent with the idea that globular cluster streams are most visible close to dissolution. Our detections are likely a lower bound on the total number of dissolving globulars in the inner galaxy, since many globulars have few RRLSs, while only the brightest streams are visible over the Galactic RRLS background, particularly given the current lack of kinematical information. We make all of our candidate streams publicly available and provide a new galstreamsPYTHON library for the footprints of all known streams and overdensities in the Milky Way.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Mateu, Cecilia
Read, Justin Ij.read@surrey.ac.uk
Kawata, Daisuke
Date : 14 November 2017
Funders : Science and Technology Facilities Council (STFC)
DOI : 10.1093/mnras/stx2937
Copyright Disclaimer : © 2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Cecilia Mateu, Justin I Read, Daisuke Kawata; Fourteen candidate RR Lyrae star streams in the inner Galaxy, Monthly Notices of the Royal Astronomical Society, Volume 474, Issue 3, 1 March 2018, Pages 4112–4129, https://doi.org/10.1093/mnras/stx2937 is available online at: https://academic.oup.com/mnras/article/474/3/4112/4628071.
Uncontrolled Keywords : Methods: data analysis; Astronomical data bases: miscellaneous; Stars: variables: RR Lyrae; Galaxy:halo; Galaxy: structure; Astrophysics - Astrophysics of Galaxies
Depositing User : Clive Harris
Date Deposited : 20 Sep 2018 15:20
Last Modified : 11 Dec 2018 11:24
URI: http://epubs.surrey.ac.uk/id/eprint/849383

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