2005-09-23

quads, dark energy, galaxy simulations, axis ratios

Sam and I discussed ways to prioritize quads, both at index time and at test time in the automated astrometry project. I started to make him a list of astrometric standards that is tailored (somewhat) to GALEX data.

Sheldon led a very nice—and lively—group meeting. He talked about the Dark Energy Survey, and, more importantly, dark energy.

Fabio Governato gave an impressive talk about making galaxies in N-body simulations, with approximate treatments of star formation and stellar-driven feedback. Among other things, he showed that the thick disk is likely to have been thickened by a merger, and the age of its stars is likely to be indicative of the cosmic time of that last major merger. I discouraged him from trying to match morphological type fractions in his simulations, since no two people agree on any galaxy's morphological type!

Ari Maller, Blanton, and I discussed the dependencies of observed galaxy properties on axis ratio.

1 comment:

  1. Rather than prioritizing quads, I'm looking for way to balance quads and hamstrings for a more defined upper leg. Also, I'd like to read any research you've done on the hard-to-hit vastus medials.

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