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An Upper Limit to the Age of the Galactic Bar
Cole, AA and Weinberg, MD (2002) An Upper Limit to the Age of the Galactic Bar. The Astrophysical Journal Letters, 574. pp. 43-46.
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Using data from the Two Micron All Sky Survey, we identify a population of infrared carbon stars with J-Ks ≥ 2 in the Milky Way. These stars are shown to trace the stellar bar previously identified in IR and optical S surveys. The properties of C stars strongly suggest that they are of intermediate age. We conclude that the bar is likely to have formed more recently than 3 Gyr ago and must be younger than 6 Gyr. Implications and further tests of this conclusion are briefly discussed
|Keywords:||Galaxy: disk—Galaxy: structure—stars: carbon|
|Journal or Publication Title:||The Astrophysical Journal Letters|
|Page Range:||pp. 43-46|
|Date Deposited:||22 Nov 2007 02:40|
|Last Modified:||18 Nov 2014 03:25|
|Item Statistics:||View statistics for this item|
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