CaltechAUTHORS
  A Caltech Library Service

Detection of a 63 degrees cold stellar stream in the Sloan Digital Sky Survey

Grillmair, C. J. and Dionatos, O. (2006) Detection of a 63 degrees cold stellar stream in the Sloan Digital Sky Survey. Astrophysical Journal Letters, 643 (1). L17-L20. ISSN 2041-8205. https://resolver.caltech.edu/CaltechAUTHORS:GRIapjl06b

[img]
Preview
PDF - Published Version
See Usage Policy.

234Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:GRIapjl06b

Abstract

We report on the detection in Sloan Digital Sky Survey data of a 63°-long tidal stream of stars, extending from Ursa Major to Cancer. The stream has no obvious association with the orbit of any known cluster or galaxy. The contrast of the detected stream is greatest when using a star count filter that is matched to the color-magnitude distribution of stars in M13, which suggests that the stars making up the stream are old and metal-poor. The visible portion of the stream is very narrow and about 8.5 kpc above the Galactic disk, suggesting that the progenitor is or was a globular cluster. While the surface density of the stream varies considerably along its length, its path on the sky is very smooth and uniform, showing no evidence of perturbations by large mass concentrations in the nearby halo. While definitive constraints cannot be established without radial velocity information, the stream's projected path and estimates of its distance suggest that we are observing the stream near the perigalacticon of its orbit.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1086/505111DOIArticle
http://www.iop.org/EJ/abstract/1538-4357/643/1/L17/PublisherArticle
ORCID:
AuthorORCID
Grillmair, C. J.0000-0003-4072-169X
Additional Information:© 2006 American Astronomical Society. Received 2006 March 17; accepted 2006 April 14; published 2006 May 2. Print publication: Issue 1 (2006 May 20). We are grateful to Helio Rocha-Pinto for comments that significantly improved the 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 US Department of Energy, the Japanese Monbukagakusho, and the Max Planck Society. Facilities: Sloan
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
Alfred P. Sloan FoundationUNSPECIFIED
Participating InstitutionsUNSPECIFIED
NASAUNSPECIFIED
NSFUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Japanese MonbukagakushoUNSPECIFIED
Max Planck SocietyUNSPECIFIED
Subject Keywords:GLOBULAR-CLUSTER PALOMAR-5; GALACTIC MASS-DISTRIBUTION; DWARF SPHEROIDAL GALAXY; TIDAL TAILS; HALO SUBSTRUCTURE; PROPER MOTION; MILKY-WAY; ORBITS; NGC-5466; DEBRIS
Issue or Number:1
Record Number:CaltechAUTHORS:GRIapjl06b
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:GRIapjl06b
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:12578
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:12 Jan 2009 20:43
Last Modified:03 Oct 2019 00:29

Repository Staff Only: item control page