AGB Stars in WLM

Details AGB Stars in WLM AGB Stars in WLM

2010-11-10

arxiv.org/abs/1011.2495v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

2 pages, proceedings for "Why Galaxies Care about AGB Stars II" conference (Vienna, Aug. 2010); to be published in ASP Confere

Scientific paper

We investigate the star formation history and metallicity of the Local Group irregular dwarf galaxy WLM using wide-field JHK near-infrared imaging, spanning a region of approximately 1 sq. degree, obtained with WFCAM on UKIRT. JHK photometry clearly reveals the tip of the red giant branch, allowing a new estimate of the distance, and allows ready identification of C-type and M-type AGB stars. The C/M ratio was used to produce a surface map of the metallicity distribution which is compared to previous studies. Multi-wavelength spectral energy distributions (SEDs) were constructed for some AGB stars.

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