Tao Jiang (NYU) brought me back up to date on his project to measure very small-scale galax–galaxy cross-correlation functions in the SDSS Main sample (that is, normal, low-redshift galaxies). His goal is to measure the merger rate as a function of mass, color, and mass ratio.
In the rest of my research time today I worked on some crazy celestial mechanics ideas; conversations with Christian Schwab (Heidelberg Sternwarte) got me thinking about how one explores the space of possible model fits to exoplanet radial velocity data.
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