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- W2895983423 abstract "We report discovery of a molecular wind signature from a massive intensely star-forming clump of a few $10^9$ Msun, in strongly gravitationally lensed submillimeter galaxy the (PLCK_G165.7+49.0) at z=2.236. The Emerald is amongst brightest high-redshift galaxies on submillimeter sky, and was initially discovered with Planck satellite. The system contains two magnificient structures with projected lengths of 28.5 and 21 formed by multiple, near-infrared arcs, falling behind a massive galaxy cluster at z=0.35, as well as an adjacent filament that has so far escaped discovery in other wavebands. We used HST/WFC3 and CFHT optical and near-infrared imaging together with IRAM and SMA interferometry of CO(4-3) line and 850 $mu$m dust emission to characterize foreground lensing mass distribution, construct a lens model with Lenstool, and calculate gravitational magnification factors between 20 and 50 in most of source. The majority of star formation takes place within two massive star-forming clumps which are marginally gravitationally bound and embedded in a $9 times 10^{10}$ Msun, fragmented disk with 20% gas fraction. One of clumps shows a pronounced blue wing in CO(4-3) line profile, which we interpret as a wind signature. The mass outflow rates are high enough for us to suspect that clump might become unbound within a few tens of Myr, unless outflowing gas can be replenished by gas accretion from surrounding disk. The velocity offset of -200 km s$^{-1}$ is above escape velocity of clump, but not that of galaxy overall, suggesting that much of this material might ultimately rain back onto galaxy and contribute to fueling subsequent star formation." @default.
- W2895983423 created "2018-10-26" @default.
- W2895983423 creator A5011478014 @default.
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- W2895983423 creator A5087159933 @default.
- W2895983423 date "2018-11-27" @default.
- W2895983423 modified "2023-09-25" @default.
- W2895983423 title "Planck's dusty GEMS. V. Molecular wind and clump stability in a strongly lensed star-forming galaxy at z=2.2." @default.
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