Sarah Pearson (NYU), Adrian Price-Whelan (Flatiron), and I met today to discuss fitting tidal streams (and especially cold stellar streams) discovered around external galaxies. We are starting with the concept of the stream track, and therefore we need to turn imaging we have of external galaxies into some description of the stream track in some coordinate system that makes sense. We spent time discussing that. We're going to start with some hacks. This isn't unrelated to the work I have been discussing on microscopy of robots: We want to make very precise measurements, but in very heterogeneous, complex imaging.
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