Image of Alice in Wonderland at the Mad Hatter's tea party You are cordially invited to afternoon tea and biscuits wine and chocolate

Astronomy Tea Talks at Caltech

Mondays, Hameetman auditorium (Cahill)
Tea:  4.00pm
Talk: 4.15pm

Organized by:

2010 - 2011 season:
29 Nov 2010 Stephanie Juneau (University of Arizona)

'Linking Starbursts, Major Mergers, and Absorbed AGNs at Redshift~0.7'

I will present a detailed study of the occurrence of star formation, active galactic nuclei (AGNs), and galaxy mergers in a sample of 70-micron selected galaxies from the Far-Infrared Deep Extragalactic Legacy survey (FIDEL). Deep multiwavelength observations reveal a complex connection between starburst, AGN, dust obscuration, and gas outflows.

We find a higher AGN fraction in 70-micron selected galaxies compared to previous studies. This difference may be due to 70-micron galaxies hosting AGNs that are heavily absorbed (Compton-thick). I present evidence that these systems are ideal test-beds for merger scenarios in which gas-rich galaxies merge, go through a deeply-embedded ULIRG phase before emerging as an X-ray and optically identified AGN. I compile galaxies at different evolutionary stages allowing us to witness this process at redshift ~ 0.7. Lastly, I will highlight the potential of future multi-wavelength studies to constrain such evolutionary scenarios.

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Last modified on 20th Jul 2011 by Dominik A. Riechers.  

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