作者: M. Aravena , S. C. Chapman , S. C. Chapman , S. C. Chapman , D. P. Marrone
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摘要: The South Pole Telescope (SPT) has systematically identified 81 high-redshift, strongly gravitationally lensed, dusty star-forming galaxies (DSFGs) in a 2500 square degree cosmological mm-wave survey. We present the final spectroscopic redshift survey of this flux-limited ($S_{870\, \mathrm{\mu m}} > 25\, \mathrm{mJy}$) sample, initially selected at $1.4$ mm. was conducted with Atacama Large Millimeter/submillimeter Array across $3$ mm spectral window, targeting carbon monoxide line emission. By combining these measurements ancillary data, SPT sample is now spectroscopically complete, redshifts spanning $1.9$$<$$z$$<$$6.9$ and median $z=3.9 \pm 0.2$. through far-infrared photometry energy density fits for all sources, along their inferred intrinsic properties. Comparing properties sources to unlensed DSFG population, we demonstrate that SPT-selected DSFGs represent most extreme infrared-luminous galaxies, even after accounting strong gravitational lensing. have star formation rate $2.3(2)\times 10^3\, \mathrm{M_\odot yr^{-1}}$ dust mass $1.4(1)\times10^9\, \mathrm{M_\odot}$. However, gas depletion timescales are comparable those DSFGs, once taken into account. This contains roughly half known confirmed $z$$>$$5$, making largest high-redshift to-date, enabling "high-redshift tail" extremely luminous be measured. Though galaxy models struggle account distribution, larger statistics from complete well-defined will help inform future theoretical efforts.