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- W2046265369 abstract "Recently, there has been great progress toward observationally determining the mean star formation history of the universe. When accurately known, the cosmic star formation rate could provide much information about Galactic evolution, if the Milky Way's star formation rate is representative of the average cosmic star formation history. A simple hypothesis is that our local star formation rate is proportional to the cosmic mean. In addition, to specify a star formation history, one must also adopt an initial mass function (IMF); typically it is assumed that the IMF is a smooth function, which is constant in time. We show how to test directly the compatibility of all these assumptions by making use of the local (solar neighborhood) star formation record encoded in the present-day stellar mass function. Present data suggest that at least one of the following is false: (1) the local IMF is constant in time; (2) the local IMF is a smooth (unimodal) function; and/or (3) star formation in the Galactic disk was representative of the cosmic mean. We briefly discuss how to determine which of these assumptions fail and also improvements in observations, which will sharpen this test." @default.
- W2046265369 created "2016-06-24" @default.
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- W2046265369 date "1999-04-20" @default.
- W2046265369 modified "2023-09-25" @default.
- W2046265369 title "Testing the Relation between the Local and Cosmic Star Formation Histories" @default.
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- W2046265369 doi "https://doi.org/10.1086/307033" @default.
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