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• W3103212746 endingPage "113" @default.
• W3103212746 startingPage "113" @default.
• W3103212746 abstract "We present a size analysis of a sample of $sim$ 49,000 galaxies from the CANDELS GOODS North and South fields using redshift-independent relative surface brightness metrics to determine an unbiased measure of the differential size evolution of galaxies at $1 leq z leq 7$. We introduce a novel method of removing foreground objects from distant galaxy ($z > 3$) images that makes use of the Lyman-break at 912{AA}, in what we call `2-D Lyman-Break Imaging'. The images used are in the rest-frame optical at $z < 3$ and progressively bluer bands at $z > 3$. They are therefore subject to K-correction and cosmological dimming effects which are tested and corrected for. We separately consider a mass-selected sample (with masses in the range 10$^9$M$_{odot}$$leq$M$_*$$leq$10$^{10.5}$M$_{odot}$) and a number density selected sample (using a constant number density of $n = 1times10^{-4}$Mpc$^{-3}$). Instead of utilising the commonly used, but potentially biased, effective radii for size measurements, we measure the redshift-independent Petrosian radius, defined by the parameter $eta$, for each galaxy for three values of $eta$ and use this as a proxy for size. The evolution of the measured radii can be described by a power-law of the form $R_{Petr} = alpha(1+z)^beta$kpc where $beta < 0$. We find that the outer radius increases more rapidly, suggesting that as a galaxy grows mass is added to its outer regions via an inside-out growth. This growth is stronger for the number density selected sample, with a growth rate of nearly three in the outer radii compared to the inner. We test and confirm these results using a series of image simulations." @default.
• W3103212746 created "2020-11-23" @default.
• W3103212746 creator A5030584627 @default.
• W3103212746 creator A5034769481 @default.
• W3103212746 creator A5040407587 @default.
• W3103212746 creator A5044244886 @default.
• W3103212746 date "2019-12-16" @default.
• W3103212746 modified "2023-10-16" @default.
• W3103212746 title "Unbiased Differential Size Evolution and the Inside-out Growth of Galaxies in the Deep CANDELS GOODS Fields at 1 ≤ <i>z</i> ≤ 7" @default.
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• W3103212746 doi "https://doi.org/10.3847/1538-4357/ab53d4" @default.
• W3103212746 hasPublicationYear "2019" @default.
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