Open Access Repository

An Upper Limit to the Age of the Galactic Bar


Downloads per month over past year

Cole, AA and Weinberg, MD 2002 , 'An Upper Limit to the Age of the Galactic Bar' , The Astrophysical Journal Letters, vol. 574 , pp. 43-46 .

[img] PDF
16382.web.pdf | Request a copy
Full text restricted
Available under University of Tasmania Standard License.


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

Item Type: Article
Authors/Creators:Cole, AA and Weinberg, MD
Keywords: Galaxy: disk—Galaxy: structure—stars: carbon
Journal or Publication Title: The Astrophysical Journal Letters
Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page