Bubble mapping with the Square Kilometre Array – I. Detecting galaxies with Euclid, JWST, WFIRST, and ELT within ionized bubbles in the intergalactic medium at z > 6
Bubble mapping with the Square Kilometre Array – I. Detecting galaxies with Euclid, JWST, WFIRST, and ELT within ionized bubbles in the intergalactic medium at z > 6
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使用平方公里阵列绘制气泡图 â I 使用 Euclid、JWST、WFIRST 和 ELT 检测 z > 6 处星系际介质中电离气泡内的星系
DOI:
10.1093/mnras/staa098
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发表时间:
2020
影响因子:
4.8
通讯作者:
Zackrisson
中科院分区:
文献类型:
--
作者:
Zackrisson
The Square Kilometre Array (SKA) is expected to provide the first tomographic observations of the neutral intergalactic medium at redshiftsz> 6 and pinpoint the locations of individual ionized bubbles during early stages of cosmic reionization. In scenarios where star-forming galaxies provide most of the ionizing photons required for cosmic reionization, one expects the first ionized bubbles to be centred on overdensities of such galaxies. Here, we model the properties of galaxy populations within isolated, ionized bubbles that SKA-1 should be able to resolve atz≈ 7–10, and explore the prospects for galaxy counts within such structures with various upcoming near-infrared telescopes. We find that, for the bubbles that are within reach of SKA-1 tomography, the bubble volume is closely tied to the number of ionizing photons that have escaped from the galaxies within. In the case of galaxy-dominated reionization, galaxies are expected to turn up above the spectroscopic detection threshold ofJWSTand ELT in even the smallest resolvable bubbles atz≤ 10. The prospects of detecting galaxies within these structures in purely photometric surveys withEuclid, WFIRST, JWST, or ELT are also discussed. While spectroscopy is preferable towards the end of reionization to provide a robust sample of bubble members, multiband imaging may be a competitive option for bubbles atz≈ 10, due to the very small number of line-of-sight interlopers expected at these redshifts.
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DOI:
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发表时间:
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期刊:
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Monthly Notices of the Royal Astronomical Society Letter
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