A Deep Large Binocular Telescope View of the Canes Venatici I Dwarf Galaxy
A Deep Large Binocular Telescope View of the Canes Venatici I Dwarf Galaxy
复制标题
深部大型双筒望远镜观察 Canes Venatici I 矮星系
DOI:
10.1086/525559
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发表时间:
2008
期刊:
影响因子:
--
通讯作者:
J. T. A
中科院分区:
文献类型:
--
作者:
Martin;Coleman;De Jong;J. T. A
We present the first deep color-magnitude diagram of the Canes Venatici I (CVn I) dwarf galaxy from observations with the wide-field Large Binocular Camera on the Large Binocular Telescope. Reaching down to the main-sequence turnoff of the oldest stars, it reveals a dichotomy in the stellar populations of CVn I: it harbors an old (≳ 10 Gyr), metal-poor ([\mathrm {Fe}\,/\mathrm {H}\,]\sim-2.0), and spatially extended population along with a much younger (∼ 1.4-2.0 Gyr), 0.5 dex more metal-rich, and spatially more concentrated population. These young stars are also offset by 64^{+ 40} _ {-20} pc to the east of the galaxy center. The data suggest that this young population, which represents∼ 3%-5% of the stellar mass of the galaxy within its half-light radius, should be identified with the kinematically cold stellar component found in a recent spectroscopic survey. CVn I therefore follows the behavior of the other remote MW dwarf spheroidals, which all contain intermediate-age and/or young populations: a complex star formation history is possible in extremely low mass galaxies.
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DOI:
10.1086/375522
发表时间:
2003-04
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
J. Kleyna;M. Wilkinson;G. Gilmore;N. Evans
通讯作者:
J. Kleyna;M. Wilkinson;G. Gilmore;N. Evans
DOI:
10.1088/0004-6256/135/4/1361
发表时间:
2007-08
期刊:
The Astronomical Journal
影响因子:
--
作者:
J. D. Jong;H. Rix;N. F. Martin;D. Zucker;A. Dolphin;E. F. Bell;V. Belokurov;N. W. E. Mpia;Heidelberg IoA;Cambridge Steward Obs.;Tucson
通讯作者:
J. D. Jong;H. Rix;N. F. Martin;D. Zucker;A. Dolphin;E. F. Bell;V. Belokurov;N. W. E. Mpia;Heidelberg IoA;Cambridge Steward Obs.;Tucson
DOI:
10.1086/522672
发表时间:
2007-10
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
M. Coleman;J. D. Jong;N. Martin;H. Rix;D. Sand;E. Bell;R. Pogge;D. Thompson;H. Hippelein;E. Giallongo;R. Ragazzoni;A. DiPaola;J. Farinato;R. Smareglia;V. Testa;J. Bechtold;J. Hill;P. Garnavich;R. Green
通讯作者:
M. Coleman;J. D. Jong;N. Martin;H. Rix;D. Sand;E. Bell;R. Pogge;D. Thompson;H. Hippelein;E. Giallongo;R. Ragazzoni;A. DiPaola;J. Farinato;R. Smareglia;V. Testa;J. Bechtold;J. Hill;P. Garnavich;R. Green
DOI:
10.1086/529137
发表时间:
2007-09
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
C. Kuehn;K. Kinemuchi;V. Ripepi;G. Clementini;M. Dall’ora;L. Di Fabrizio;C. Rodgers;C. Greco;M. Marconi;I. Musella;H. Smith;M. Catelán;T. Beers;B. Pritzl
通讯作者:
C. Kuehn;K. Kinemuchi;V. Ripepi;G. Clementini;M. Dall’ora;L. Di Fabrizio;C. Rodgers;C. Greco;M. Marconi;I. Musella;H. Smith;M. Catelán;T. Beers;B. Pritzl
DOI:
10.1086/518025
发表时间:
2007-03
期刊:
The Astrophysical Journal
影响因子:
--
作者:
R. Wyse;G. Gilmore
通讯作者:
R. Wyse;G. Gilmore