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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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