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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 421386.0, MPI für Astronomie / Publikationen_mpia
Numerical color-magnitude diagram analysis of Sloan Digital Sky Survey data and application to the New Milky Way satellites
Authors:de Jong, J. T. A.; Rix, H. W.; Martin, N. F.; Zucker, D. B.; Dolphin, A. E.; Bell, E. F.; Belokurov, V.; Evans, N. W.
Language:English
Date of Publication (YYYY-MM-DD):2008
Title of Journal:The Astronomical Journal
Volume:135
Start Page:1361
End Page:1383
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We have tested the application to Sloan Digital Sky Survey (SDSS) data of the software package MATCH, which fits color-magnitude diagrams (CMDs) to estimate stellar population parameters and distances. These tests on a set of six globular clusters show that these techniques recover their known properties. New ways of using the CMD-fitting software enable us to deal with an extended distribution of stars along the line-of-sight, to constrain the overall properties of sparsely populated objects, and to detect the presence of stellar overdensities in wide-area surveys. We then also apply MATCH to CMDs for 12 recently discovered Milky Way satellites to derive in a uniform fashion their distances, ages, and metallicities. While the majority of them appear consistent with a single stellar population, CVn I, UMa II, and Leo T exhibit (from SDSS data alone) a more complex history with multiple epochs of star formation.
Free Keywords:galaxies: dwarf; galaxies: stellar content; methods: numerical; methods: statistical; surveys
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2008AJ....135.1361D [ID No:1]
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