Two newly identified, relatively old star clusters in the Small Magellanic Cloud
| Autor: | M. Wischnjewsky, Andrés E. Piatti, Doug Geisler, Carme Gallart, Ata Sarajedini |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Physics
Star formation Metallicity Ciencias Físicas Astronomy Astronomy and Astrophysics Astrophysics purl.org/becyt/ford/1.3 [https] Galaxy Photometry (optics) Astronomía purl.org/becyt/ford/1 [https] Star cluster Space and Planetary Science Cluster (physics) Small Magellanic Cloud CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| DOI: | 10.1111/j.1745-3933.2007.00373.x |
| Popis: | We present the results on the age and metallicity estimates of the Small Magellanic Cloud (SMC) clusters L110, L112 and L113 obtained from CCD Washington CT1 photometry. We confirm L113 as a relatively old and metal-poor cluster, and report for the first time that L110 and 112 are also relatively old clusters (t ~ 6.5 Gyr). Their derived ages and metallicities reinforce previous suggestions that the farther a cluster is from the centre of the galaxy, the older and more metal-poor it is, with some dispersion. In addition, the bursting star formation model still appears to be the most probable paradigm to describe the SMC´s star formation history. We call attention to a second possible burst at ~6-7 Gyr, besides the known burst at ~3 Gyr. Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina Fil: Sarajedini, Ata. University of Florida; Estados Unidos Fil: Geisler, Doug. Universidad de Concepción; Chile Fil: Gallart, Carme. Instituto de Astrof´ısica de Canarias; España Fil: Wischnjewsky, Marina. |
| Databáze: | OpenAIRE |
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