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An Upper Limit to the Age of the Galactic Bar

Citation

Cole, AA and Weinberg, MD, An Upper Limit to the Age of the Galactic Bar, The Astrophysical Journal, 574, (1) pp. L43-L46. ISSN 0004-637X (2002) [Refereed Article]

DOI: doi:10.1086/342278

Abstract

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 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.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical and Space Sciences
Research Field:Galactic Astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Physical Sciences
Author:Cole, AA (Dr Andrew Cole)
ID Code:45320
Year Published:2002
Web of Science® Times Cited:45
Deposited By:Physics
Deposited On:2007-11-26
Last Modified:2007-11-26
Downloads:0

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