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Conference Paper

Star Formation History of the WLM dIrr

MPS-Authors

Hughes,  Joanne D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Stetson,  Peter B.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Leaman,  Ryan
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wallerstein,  George
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Cook,  Zalia
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

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Citation

Hughes, J. D., Stetson, P. B., Leaman, R., Wallerstein, G., & Cook, Z. (2019). Star Formation History of the WLM dIrr. In American Astronomical Society Meeting Abstracts #233.


Cite as: https://hdl.handle.net/21.11116/0000-0005-D0E2-0
Abstract
The HI-gas-rich, WLM dwarf irregular galaxy has been forming stars for at least 11 Gyr. It is one of the nearest examples of isolated, metal- poor star formation in the Local Group, and contains a single globular cluster. We explore the spatial distribution, ages, and chemical evolution of its stellar population, particularly in the metal-poor halo, compared to the rotating bulge/disk system. We present an extensive imaging survey in BVRI filters (based largely on archival data) as a supplement to previous spectroscopy of a limited sample of giants and supergiants. In addition, a Washington-C survey has been carried out along the rotation (minor) axis into the halo, where the Washington color, C-T1(where the R-filter can be used) can be up to 3 times more sensitive to metallicity than V-I for giant-branch populations.