"High-redshift star formation under the cosmic microscope" by Joaquin Vieira (University of Illinois at Urbana-Champaign)

Date: 
Thursday, February 22, 2018 - 4:00pm to 5:00pm
Series: 
Physics and Astronomy Colloquium

Thursdays, 4:00-5:00 pm

1-434 Physics and Astronomy (map)
Reception from 3:30-4:00 p.m.
(unless otherwise posted)

 

Guest Speaker:

 

Joaquin Vieira (University of Illinois at Urbana-Champaign)

Talk Title:  “High-redshift star formation under the cosmic microscope”

Abstract:

Recent facilities such as the South Pole Telescope (SPT), the Herschel Space Observatory, and the Atacama Large Millimeter Array (ALMA) have opened a window to the millimeter (mm) sky and revealed a unique and unprecedented view of the dusty Universe. In a 2500 square degree cosmological survey, SPT has systematically identified a large number (>100) of high-redshift strongly gravitationally lensed starburst galaxies. We have completed a unique spectroscopic redshift survey with ALMA, targeting carbon monoxide line emission in these sources, across the 3mm spectral window. We have obtained spectroscopic redshifts for 82 sources from 1.8 < z < 6.9, with a median of z=3.9. This sample comprises 70% of the total spectroscopically confirmed DSFGs at z>4 and extends into the epoch of re-ionization. We are systematically measuring low-J CO, [CII], and [NII] for these sources with ATCA, APEX, and ALMA, making this the largest and most well-studied samples of high-redshift starburst galaxies. We are also using the lensing magnification to study these sources at the highest possible resolution with CO, [CII], and H2O. We are undertaking a comprehensive and systematic followup campaign to use these ``cosmic magnifying glasses'' to study the physical conditions and chemical evolution of the dust-obscured universe in unprecedented detail. I will describe our team’s latest science results and discuss the scientific potential of these strongly lensed starburst galaxies within the context of future instruments and facilities.

 

For more information, contact Jay Hauser

 

We thank the following people for their contributions to the wine fund for the post-colloquium reception:
Prof. Dolores Bozovic, Prof. Robijn Bruinsma, Prof. Wesley Campbell, Prof. Bob Cousins, Prof. Jay Hauser, Prof. Eric Hudson, Robert Huff, Prof. HongWen Jiang, Prof. Alex Kusenko, Prof. John Miao, Prof. George Morales, Prof. Pietro Musumeci, Prof. Christoph Niemann, Prof. Rene Ong, Prof. James Rosenzweig, Prof. David Saltzberg, and Prof. Jean Turner.

Location: 
1-434 PAB