Building Massive Galaxies: Measuring Hierarchical Assembly with BOSS

Details Building Massive Galaxies: Measuring Hierarchical Assembly with BOSS Building Massive Galaxies: Measuring Hierarchical Assembly with BOSS

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21930706b&link_type=abstract

American Astronomical Society, AAS Meeting #219, #307.06

Astronomy and Astrophysics

Astronomy

Scientific paper

The physical processes that regulate the growth of massive galaxies remain poorly understood. Globally, it is expected that such galaxies assemble at late times, but this basic prediction of hierarchical models is largely untested because cosmic variance in the small volumes sampled by current high-z surveys swamps any potential signal. I will discuss first results from measurements of galaxy assembly with the Baryon Oscillation Spectroscopic Survey (BOSS). After carefully combining near-IR photometry from the UKIDSS Large Area Survey in order to robustly measure stellar mass, I will show how at redshifts less than 0.5, BOSS is able to track differential growth at the highest masses for the first time.

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