Fredagskollokvium: Down the Dusty Road -- Gems from Large (sub-) millimetre Surveys

Thomas Rodriguez Greve, Department of Physics & Astronomy at UCL and  Cosmic  Dawn Centre in Copenhagen 

portrait photo of a man

Thomas Rodriguez Greve, co-director for Cosmic Dawn Center (DAWN), DTU-Space/UCL.

Foto: T. Greve

In the last decade, single-dish (sub-)millimetre surveys covering 100-1000 square degrees on the sky have allowed for the harvesting of 100s of strongly gravitationally lensed (magnification factors >10) high-z dusty starburst galaxies -- objects that due to their lensing-configuration are too rare to be uncovered in significant numbers in smaller surveys. 

These objects, owing to their brightness, are 'easy pickings' for follow-up observations with ALMA and Hubble, and have proven to be a treasure for studying the most extreme dusty starburst galaxies back to 800 million years after the Big Bang. 

In this talk I will present the latest results from the South Pole Telescope Submillimeter Galaxy Survey (SPT-SMG), which has produced the largest and best-studied sample of lensed starburst galaxies in the young Universe. 

Finally, I will talk about plans to conduct large mm-surveys from the Arctic, using the 12meter Greenland Telescope, currently located at Thule Airbase.

Bildet kan inneholde: astronomisk objekt, himmel, stemning, verdensrommet, astronomi.
Artist’s impression of one of the SPT-discovered sources based on observation by ALMA and Hubble Space Telescope (HST). The massive central galaxy (in blue, seen by HST) bends the light of a more distant, submillimeter-bright galaxy, forming a ring-like image of the background galaxy that is observed by ALMA (red). Credit: Y. Hezaveh.

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Emneord: fredagskollokvium, Seminar, telescopes, Observations, extragalactic astronomy
Publisert 10. nov. 2019 07:44 - Sist endret 2. juni 2020 15:29