Numerical color-magnitude diagram analysis of sloan digital sky survey data and application to the new milky way satellites

被引：40

作者：

De Jong, J. T. A. ^{[1
]}

Rix, H. -W. ^{[1
]}

Martin, N. F. ^{[1
]}

Zucker, D. B. ^{[2
]}

Dolphin, A. E. ^{[3
]}

Bell, E. F. ^{[1
]}

Belokurov, V. ^{[2
]}

Evans, N. W. ^{[2
]}

机构：

[1] Max Planck Inst Astron, D-69117 Heidelberg, Germany

[2] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[3] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

来源：

ASTRONOMICAL JOURNAL | 2008年 / 135卷 / 04期

基金：

英国科学技术设施理事会;

关键词：

galaxies : dwarf; galaxies : stellar content; methods : numerical; methods : statistical; surveys;

D O I：

10.1088/0004-6256/135/4/1361

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：1361 / 1383

页数：23

共 75 条

[1]

ADELMANMCCARTHY, 2007, APJS, V172, P634

[2] The stellar content and the star formation history of the local group dwarf galaxy LGS 3 [J].

Aparicio, A ;

Gallart, C ;

Bertelli, G .

ASTRONOMICAL JOURNAL, 1997, 114 (02) :680-693

[3]

BEL EF, 2007, UNPUB APJ

[4] Cats and dogs, hair and a hero: A quintet of new Milky Way companions [J].

Belokurov, V. ;

Zucker, D. B. ;

Evans, N. W. ;

Kleyna, J. T. ;

Koposov, S. ;

Hodgkin, S. T. ;

Irwin, M. J. ;

Gilmore, G. ;

Wilkinson, M. I. ;

Fellhauer, M. ;

Bramich, D. M. ;

Hewett, P. C. ;

Vidrih, S. ;

De Jong, J. T. A. ;

Smith, J. A. ;

Rix, H. -W. ;

Bell, E. F. ;

Wyse, R. F. G. ;

Newberg, H. J. ;

Mayeur, P. A. ;

Yanny, B. ;

Rockosi, C. M. ;

Gnedin, O. Y. ;

Schneider, D. P. ;

Beers, T. C. ;

Barentine, J. C. ;

Brewington, H. ;

Brinkmann, J. ;

Harvanek, M. ;

Kleinman, S. J. ;

Krzesinski, J. ;

Long, D. ;

Nitta, A. ;

Snedden, S. A. .

ASTROPHYSICAL JOURNAL, 2007, 654 (02) :897-906

[5] A faint new milky way satellite in Bootes [J].

Belokurov, V. ;

Zucker, D. B. ;

Evans, N. W. ;

Wilkinson, M. I. ;

Irwin, M. J. ;

Hodgkin, S. ;

Bramich, D. M. ;

Irwin, J. M. ;

Gilmore, G. ;

Willman, B. ;

Vidrih, S. ;

Newberg, H. J. ;

Wyse, R. F. G. ;

Fellhauer, M. ;

Hewett, P. C. ;

Cole, N. ;

Bell, E. F. ;

Beers, T. C. ;

Rockosi, C. M. ;

Yanny, B. ;

Grebel, E. K. ;

Schneider, D. P. ;

Lupton, R. ;

Barentine, J. C. ;

Brewington, H. ;

Brinkmann, J. ;

Harvanek, M. ;

Kleinman, S. J. ;

Krzesinski, J. ;

Long, D. ;

Nitta, A. ;

Smith, J. A. ;

Snedden, S. A. .

ASTROPHYSICAL JOURNAL, 2006, 647 (02) :L111-L114

[6] The field of streams: Sagittarius and its siblings [J].

Belokurov, V. ;

Zucker, D. B. ;

Evans, N. W. ;

Gilmore, G. ;

Vidrih, S. ;

Bramich, D. M. ;

Newberg, H. J. ;

Wyse, R. F. G. ;

Irwin, M. J. ;

Fellhauer, M. ;

Hewett, P. C. ;

Walton, N. A. ;

Wilkinson, M. I. ;

Cole, N. ;

Yanny, B. ;

Rockosi, C. M. ;

Beers, T. C. ;

Bell, E. F. ;

Brinkmann, J. ;

Ivezic, Z. . ;

Lupton, R. .

ASTROPHYSICAL JOURNAL, 2006, 642 (02) :L137-L140

[7]

Borissova J, 1999, ASTRON ASTROPHYS, V343, P813

[8] Mapping the inner halo of the Galaxy with 2MASS-selected horizontal-branch candidates [J].

Brown, WR ;

Geller, MJ ;

Kenyon, SJ ;

Beers, TC ;

Kurtz, MJ ;

Roll, JB .

ASTRONOMICAL JOURNAL, 2004, 127 (03) :1555-1566

[9] Tracing galaxy formation with stellar halos. I. Methods [J].

Bullock, JS ;

Johnston, KV .

ASTROPHYSICAL JOURNAL, 2005, 635 (02) :931-949

[10]

Clem J.L., 2006, THESIS U VICTORIA

← 1 2 3 4 5 6 7 8 →