New HST WFC3/UVIS observations augment the stellar-population complexity of omega Centauri
Bellini A. (1,2), Bedin L. R. (2), Piotto G. (1), Milone A. P. (1),, Marino A. F. (1,3), Villanova S. (4) ((1) Univ. Padova, (2) STScI, (3) Univ., Catolica Chile, (4) Univ. Concepcion Chile)
TL;DR
This study uses new HST WFC3/UVIS observations combined with existing data to reveal an even more complex stellar population in omega Centauri than previously known, enhancing understanding of its stellar diversity.
Contribution
The paper presents new ultraviolet-optical CMDs of omega Centauri, showing increased complexity in its stellar populations compared to prior studies.
Findings
Revealed more complex stellar populations in omega Centauri
Combined UV and optical data for detailed CMD analysis
Identified intricate morphology of the cluster's stellar populations
Abstract
We used archival multi-band Hubble Space Telescope observations obtained with the Wide-Field Camera 3 in the UV-optical channel to present new important observational findings on the color-magnitude diagram (CMD) of the Galactic globular cluster omega Centauri. The ultraviolet WFC3 data have been coupled with available WFC/ACS optical-band data. The new CMDs, obtained from the combination of colors coming from eight different bands, disclose an even more complex stellar population than previously identified. This paper discusses the detailed morphology of the CMDs.
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