IZw18, or the picture of Dorian Gray: the more you watch it, the older it gets

Details IZw18, or the picture of Dorian Gray: the more you watch it, the older it gets IZw18, or the picture of Dorian Gray: the more you watch it, the older it gets

2006-09-25

arxiv.org/abs/astro-ph/0609659v1

Astronomy and Astrophysics

Astrophysics

2 pages, 3 figs, needs iaus.cls. Proceedings of the IAU Symp. 235 "Galaxies across the Hubble Time", held in Prague in August

Scientific paper

IZw18 has been recurrently claimed to be a young galaxy, but stars of
increasingly older ages are found every time deeper magnitude levels are
reached with high-resolution photometry: from the original few Myrs to,
possibly, several Gyrs. We summarize the history of IZw18's age and an HST
project which will allow us to derive both its distance and age.

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