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Mapping low-latitude stellar substructure with SEGUE photometry

Published online by Cambridge University Press:  01 June 2008

Jelte T. A. de Jong ,
Brian Yanny ,
Hans-Walter Rix ,
Eric F. Bell  and
Andrew E. Dolphin
Jelte T. A. de Jong
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany email: dejong@mpia.de
Brian Yanny
Affiliation:
Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, United States
Hans-Walter Rix
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany email: dejong@mpia.de
Eric F. Bell
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany email: dejong@mpia.de
Andrew E. Dolphin
Affiliation:
Raytheon Corporation, 870 Winter Street, Waltham, MA 02451, United States
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Abstract

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Encircling the Milky Way at low latitudes, the Low Latitude Stream is a large stellar structure, the origin of which is as yet unknown. As part of the SEGUE survey, several photometric scans have been obtained that cross the Galactic plane, spread over a longitude range of 50° to 203°. These data allow a systematic study of the structure of the Galaxy at low latitudes, where the Low Latitude Stream resides. We apply colour-magnitude diagram fitting techniques to map the stellar (sub)structure in these regions, enabling the detection of overdensities with respect to smooth models. These detections can be used to distinguish between different models of the Low Latitude Stream, and help to shed light on the nature of the system.

Keywords

Galaxy: stellar content — Galaxy: structure
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Issue S254: The Galaxy Disk in Cosmological Context , June 2008 , pp. 121 - 126
Copyright
Copyright © International Astronomical Union 2009

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