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The ACS LCID project: overview and first results

Published online by Cambridge University Press:  01 December 2006

Carme Gallart
Carme Gallart
Affiliation:
Instituto de Astrofísica de Canarias, C/Vía Láctea s/n, 38200 La Laguna, Tenerife, Spain email: carme@iac.es
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Abstract

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The star formation history (SFH) of Local Group galaxies is a powerful tool for studying their evolution, including chemical enrichment histories and stellar population gradients, which in turn may shed light on the role of reionization or Supernovae feedback in galaxy formation and evolution. In particular, isolated dwarfs are ideal laboratories since their evolution has not been complicated by the vicinity of giant galaxies. In this paper, we present the project Local Cosmology from Isolated Dwarfs (LCID), aimed at deriving detailed SFHs for a sample of Local Group isolated dwarf galaxies. To accomplish this goal we have collected, using the ACS on board the HST, color-magnitude diagrams (CMD) reaching their oldest main sequence turnoff (V≃ 28 or MV ≃ + 3.5) with good photometric accuracy. Some preliminary results from the CMDs are shown and briefly discussed.

Keywords

galaxies: dwarfstellar contentformationevolutionLocal Groupearly universe
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S241: Stellar Populations as Building Blocks of Galaxies , December 2006 , pp. 290 - 294
Copyright
Copyright © International Astronomical Union 2007

References

Aparicio, A. & Gallart, C. 2004, AJ, 128, 1465CrossRefGoogle Scholar
Bertelli, G. & Nasi, E. 2001, AJ, 121, 1013CrossRefGoogle Scholar
Blitz, L. & Robishaw, T. 2000, ApJ, 541, 675CrossRefGoogle Scholar
Cole, A.A. et al. 2007, ApJ Letters, in pressGoogle Scholar
Gallart, C., Freedman, W.L., Aparicio, A., Bertelli, G. & Chiosi, C. 1999, AJ, 118, 2245CrossRefGoogle Scholar
Gallart, C., Zoccali, M. & Aparicio, A. 2005, ARAA, 43, 387CrossRefGoogle Scholar
Hidalgo, S.L., Aparicio, A., Martínez-Delgado, D. 2006, ApJ, submittedGoogle Scholar
Mayer, L., Mastropietro, C., Wadsley, J., Stadel, J. & Moore, B. 2006, MNRAS, 369, 1021CrossRefGoogle Scholar
Mayer, L. 2005, in IAU Col. 198, Near-field Cosmology with Dwarf Elliptical Galaxies, ed. Jerjen, H. & Binggeli, B., 220Google Scholar
Pietrinferni, A., Cassisi, S., Salaris, M., Castelli, F. 2004, ApJ, 612, 168CrossRefGoogle Scholar
Skillman, E. D., Tolstoy, E., Cole, A. A., Dolphin, A. E., Saha, A., Gallagher, J. S., Dohm-Palmer, R. C. & Mateo, M. 2003, ApJ, 596, 253CrossRefGoogle Scholar