SPT2349-56: the most massive and active proto-cluster known at z=4.3
As part of the follow-up of bright 1.4mm sources from the South Pole Telescope 2500 square degree survey, we have identified a unique proto-cluster at z=4.3. Using ALMA CO(4-3) and [CII] spectroscopy, we have spectroscopically confirmed at least 12 members within a radius of 13 arcseconds. These 12...
Main Authors: | , , |
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Format: | Conference Object |
Language: | unknown |
Published: |
Zenodo
2017
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Subjects: | |
Online Access: | https://doi.org/10.5281/zenodo.830191 |
Summary: | As part of the follow-up of bright 1.4mm sources from the South Pole Telescope 2500 square degree survey, we have identified a unique proto-cluster at z=4.3. Using ALMA CO(4-3) and [CII] spectroscopy, we have spectroscopically confirmed at least 12 members within a radius of 13 arcseconds. These 12 members have a combined star formation rate of 6800 M_sol/yr, which may increase up to 22000 M_sol/yr if the entire LABOCA 870µm flux of 100 mJy is accounted for. The 12 members have a velocity dispersion of 500 km/s, implying a virial mass of ~2x10 13 M_sol. This makes SPT2349-56 a truly unique proto-cluster both in terms of mass and star-formation rate. Poster presentation at GCF2017. |
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