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• W2078484744 endingPage "3908" @default.
• W2078484744 startingPage "3892" @default.
• W2078484744 abstract "We present a new near-field cosmological probe of the initial mass function (IMF) of the first stars. Specifically, we constrain the lower mass limit of the Population III (Pop III) IMF with the total number of stars in large, unbiased surveys of the Milky Way. We model the early star formation history in a Milky Way-like halo with a semi-analytic approach, based on Monte Carlo sampling of dark matter merger trees, combined with a treatment of the most important feedback mechanisms. Assuming a logarithmically flat Pop III IMF and varying its low-mass limit, we derive the number of expected survivors of these first stars, using them to estimate the probability to detect any such Pop III fossil in stellar archaeological surveys. Following our analysis, the most promising region to find possible Pop III survivors is the stellar halo of the Milky Way, which is the best target for future surveys. We find that if no genuine Pop III survivor is detected in a sample size of 4 × 106 (2 × 107) halo stars with well-controlled selection effects, then we can exclude the hypothesis that the primordial IMF extended down below 0.8 M⊙ at a confidence level of 68 per cent (99 per cent). With the sample size of the Hamburg/European Southern Observatory survey, we can tentatively exclude Pop III stars with masses below 0.65 M⊙ with a confidence level of 95 per cent, although this is subject to significant uncertainties. To fully harness the potential of our approach, future large surveys are needed that employ uniform, unbiased selection strategies for high-resolution spectroscopic follow-up." @default.
• W2078484744 created "2016-06-24" @default.
• W2078484744 creator A5029548567 @default.
• W2078484744 creator A5046201168 @default.
• W2078484744 creator A5062809181 @default.
• W2078484744 creator A5086780511 @default.
• W2078484744 date "2015-01-29" @default.
• W2078484744 modified "2023-10-10" @default.
• W2078484744 title "Constraining the primordial initial mass function with stellar archaeology" @default.
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