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- W2040797364 abstract "We report the discovery of a giant Lyα emitter (LAE) with a Spitzer/Infrared Array Camera (IRAC) counterpart near the reionization epoch at z = 6.595. The giant LAE is found from the extensive 1 deg2 Subaru narrowband survey for z = 6.6 LAEs in the Subaru/XMM-Newton Deep Survey (SXDS) field, and subsequently identified by deep spectroscopy of Keck/DEIMOS and Magellan/IMACS. Among our 207 LAE candidates, this LAE is not only the brightest narrowband object with L(Lyα) = 3.9 ± 0.2 × 1043 erg s−1 in our survey volume of 106 Mpc3, but also a spatially extended Lyα nebula with the largest isophotal area whose major axis is at least ≃3''. This object is more likely to be a large Lyα nebula with a size of ≳17 kpc than to be a strongly lensed galaxy by a foreground object. Our Keck spectrum with medium–high spectral and spatial resolutions suggests that the velocity width is vFWHM = 251 ± 21 km s−1, and that the line-center velocity changes by ≃60 km s−1 in a 10 kpc range. The stellar mass and star formation rate are estimated to be 0.9–5.0 × 1010 M☉ and >34 M☉ yr−1, respectively, from the combination of deep optical to infrared images of Subaru, UKIDSS-Ultra Deep Survey, and Spitzer/IRAC. Although the nature of this object is not yet clearly understood, this could be an important object for studying cooling clouds accreting onto a massive halo, or forming-massive galaxies with significant outflows contributing to cosmic reionization and metal enrichment of intergalactic medium." @default.
- W2040797364 created "2016-06-24" @default.
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- W2040797364 date "2009-04-22" @default.
- W2040797364 modified "2023-10-16" @default.
- W2040797364 title "DISCOVERY OF A GIANT Lyα EMITTER NEAR THE REIONIZATION EPOCH" @default.
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