The emergence of the red sequence at z~2, seen through galaxy clustering in the UKIDSS UDS

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• Will Hartley (University of Nottingham)
• Wednesday 21 March 2012, 14:00-15:00
• Physics Library, Physics West Building.

If you have a question about this talk, please contact Alastair Sanderson.

One of the longest-standing problems in extra-Galactic astronomy is the emergence of the red sequence of galaxies. Made up of predominantly passively-evolving systems, the origin of the red sequence is a problem that has never been fully answered. We are now in the era of exquisite multi-wavelength surveys and able to tackle this problem in ways that were not previously possible. With its unique K-band depth and Spitzer coverage (plus very deep data at shorter wavelengths) the UKIDSS Ultra-Deep Survey (UDS) is the ideal survey for studying the z~2 universe, and in particular the few faint, passive objects that exist at this redshift. This epoch is crucial for study as it is when the first significant populations of passive galaxies are observed. Using measurements of the large-scale structure of such samples I will show where these galaxies are located in the Universe (i.e. their host dark matter halo mass) and what this can tell us about the process of transformation from star-forming to passive.

This talk is part of the Astrophysics Talks Series series.

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• Astrophysics Talks Series
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