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• W1972726718 startingPage "115" @default.
• W1972726718 abstract "We use a robust sample of 11 z ∼ 7 galaxies (z850 dropouts) to estimate the stellar mass density (SMD) of the universe when it was only ∼750 Myr old. We combine the very deep optical to near-infrared photometry from the Hubble Space Telescope Advanced Camera for Surveys and NICMOS cameras with mid-infrared Spitzer Infrared Array Camera (IRAC) imaging available through the GOODS program. After carefully removing the flux from contaminating foreground sources, we have obtained reliable photometry in the 3.6 μm and 4.5 μm IRAC channels. The spectral shapes of these sources, including their rest-frame optical colors, strongly support their being at z ∼ 7 with a mean photometric redshift of 〈z〉 = 7.2 ± 0.5. We use Bruzual & Charlot synthetic stellar population models to constrain their stellar masses and star formation histories. We find stellar masses that range over (0.1–12) × 109 M☉ and average ages from 20 Myr to 425 Myr with a mean of ∼300 Myr, suggesting that in some of these galaxies most of the stars were formed at z > 8 (and probably at z ≳ 10). The best fits to the observed SEDs are consistent with little or no dust extinction, in agreement with recent results at z ∼ 4–8. The star formation rates (SFRs) are in the range from 5 to 20 M☉ yr-1. From this sample, we measure an SMD of 6.6+5.4−3.3 × 105 M☉ Mpc-3 to a limit of MUV,AB < −20 (or 0.4L*z = 3). Combined with a fiducial lower limit for their ages (80 Myr), this implies a maximum SFR density of 0.008 M☉ yr−1 Mpc−3. This is well below the critical level needed to reionize the universe at z ∼ 8 using standard assumptions. However, this result is based on luminous sources (>L*) and does not include the dominant contribution of the fainter galaxies. Strikingly, we find that the specific SFR is constant from z ∼ 7 to z ∼ 2 but drops substantially at more recent times." @default.
• W1972726718 created "2016-06-24" @default.
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• W1972726718 date "2010-03-18" @default.
• W1972726718 modified "2023-09-27" @default.
• W1972726718 title "THE STELLAR MASS DENSITY AND SPECIFIC STAR FORMATION RATE OF THE UNIVERSE AT<i>z</i>∼ 7" @default.
• W1972726718 cites W1554821233 @default.
• W1972726718 cites W1572126587 @default.
• W1972726718 cites W1602680202 @default.
• W1972726718 cites W1787231361 @default.
• W1972726718 cites W1964084977 @default.
• W1972726718 cites W1964995422 @default.
• W1972726718 cites W1969070606 @default.
• W1972726718 cites W1969291367 @default.
• W1972726718 cites W1970333333 @default.
• W1972726718 cites W1972232491 @default.
• W1972726718 cites W1973313810 @default.
• W1972726718 cites W1983192361 @default.
• W1972726718 cites W1988827343 @default.
• W1972726718 cites W1993491708 @default.
• W1972726718 cites W1994671833 @default.
• W1972726718 cites W2005411300 @default.
• W1972726718 cites W2012035798 @default.
• W1972726718 cites W2013199462 @default.
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• W1972726718 cites W2021147156 @default.
• W1972726718 cites W2022930874 @default.
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• W1972726718 cites W2025458316 @default.
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• W1972726718 cites W2040441522 @default.
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• W1972726718 cites W2048195627 @default.
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• W1972726718 cites W2068368465 @default.
• W1972726718 cites W2074037441 @default.
• W1972726718 cites W2077742828 @default.
• W1972726718 cites W2079227246 @default.
• W1972726718 cites W2082592033 @default.
• W1972726718 cites W2083365390 @default.
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• W1972726718 cites W2142238829 @default.
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• W1972726718 cites W2591733255 @default.
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• W1972726718 doi "https://doi.org/10.1088/0004-637x/713/1/115" @default.
• W1972726718 hasPublicationYear "2010" @default.
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