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• W4226372785 endingPage "4463" @default.
• W4226372785 startingPage "4451" @default.
• W4226372785 abstract "ABSTRACT We determine the [O III]λ5007 equivalent width (EW) distribution of $1.700lt rm {z}lt 2.274$ rest-frame ultraviolet (UV)-selected (MUV &lt; −19) star-forming galaxies in the GOODS North and South fields. We make use of deep HDUV broad-band photometry catalogues for selection and 3D-HST WFC3/IR grism spectra for measurement of line properties. The [O III]λ5007 EW distribution allows us to measure the abundance of extreme emission line galaxies (EELGs) within this population. We model a lognormal distribution to the [O III]λ5007 rest-frame EWs of galaxies in our sample, with location parameter μ = 4.24 ± 0.07 and variance parameter σ = 1.33 ± 0.06. This EW distribution has a mean [O III]λ5007 EW of 168 ± 1 Å. The fractions of $rm {z}sim 2$ rest-UV-selected galaxies with [O III]λ5007 EWs greater than 500, 750, and 1000 Å are measured to be $6.8^{+1.0}_{-0.9}{{ rm per cent}}$, $3.6^{+0.7}_{-0.6}{{ rm per cent}}$, and $2.2^{+0.5}_{-0.4}{{ rm per cent}}$, respectively. The EELG fractions do not vary strongly with UV luminosity in the range (−21.6 &lt; MUV &lt; −19.0) considered in this paper, consistent with findings at higher redshifts. We compare our results to $rm {z}sim 5$ and $rm {z}sim 7$ studies, where candidate EELGs have been discovered through Spitzer/IRAC colours, and we identify rapid evolution with redshift in the fraction of star-forming galaxies observed in an extreme emission line phase (a rise by a factor ∼10 between $rm {z}sim 2$ and $rm {z}sim 7$). This evolution is consistent with an increased incidence of strong bursts in the galaxy population of the reionization era. While this population makes a sub-dominant contribution of the ionizing emissivity at $rm {z}simeq 2$, EELGs are likely to dominate the ionizing output in the reionization era." @default.
• W4226372785 created "2022-05-05" @default.
• W4226372785 creator A5044523987 @default.
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• W4226372785 creator A5077019414 @default.
• W4226372785 creator A5079172029 @default.
• W4226372785 creator A5083991070 @default.
• W4226372785 date "2022-04-25" @default.
• W4226372785 modified "2023-10-14" @default.
• W4226372785 title "The [O III]λ5007 equivalent width distribution at z ∼ 2: the redshift evolution of the extreme emission line galaxies" @default.
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