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Two New Halo Debris Streams in the Sloan Digital Sky Survey

Grillmair, C. J. (2014) Two New Halo Debris Streams in the Sloan Digital Sky Survey. Astrophysical Journal Letters, 790 (1). Art. No. L10. ISSN 2041-8205.

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Using photometry from Data Release 10 of the northern footprint of the Sloan Digital Sky Survey, we detect two new stellar streams with lengths of between 25° and 50°. The streams, which we designate Hermus and Hyllus, are at distances of between 15 and 23 kpc from the Sun and pass primarily through Hercules and Corona Borealis. Stars in the streams appear to be metal-poor, with [Fe/H]   ~   − 2.3, though we cannot rule out metallicities as high as [Fe/H] = −1.2. While Hermus passes within 1° (in projection) of the globular cluster NGC 6229, a roughly one magnitude difference in distance modulus, combined with no signs of connecting with NGC 6229's Roche lobe, argue against any physical association between the two. Though the two streams almost certainly had different progenitors, similarities in preliminary orbit estimates suggest that those progenitors may themselves have been a product of a single accretion event.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Grillmair, C. J.0000-0003-4072-169X
Additional Information:© 2014 The American Astronomical Society. Received 2014 April 30; accepted 2014 June 23; published 2014 July 9. We are grateful to an anonymous referee for a careful reading and many useful comments that significantly improved the final manuscript. Funding for the creation and distribution of the SDSS Archive has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Aeronautics and Space Administration, the National Science Foundation, the U.S. Department of Energy, the Japanese Monbukagakusho, and the Max Planck Society. Facility: Sloan - Sloan Digital Sky Survey Telescope
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Alfred P. Sloan FoundationUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Japanese MonbukagakushoUNSPECIFIED
Max Planck SocietyUNSPECIFIED
Subject Keywords:Galaxy: halo; Galaxy: structure; globular clusters: general
Issue or Number:1
Record Number:CaltechAUTHORS:20140829-083847943
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Official Citation:Two New Halo Debris Streams in the Sloan Digital Sky Survey C. J. Grillmair 2014 ApJ 790 L10
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49046
Deposited By: Jason Perez
Deposited On:29 Aug 2014 19:42
Last Modified:03 Oct 2019 07:10

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