Aaron Barth (UCI) gave our seminar today, about reverberation mapping to get black-hole masses in galaxies with active nuclei. He showed results on attempts to truly invert the problem of the distribution of gas; Brendon Brewer (UCSB), who will be visiting me next week, has been doing some great stuff there with his collaborators at UCSB. Barth emphasized that reverberation mapping is not a precise tool, but it seems to me that with serious modeling of a serious spectroscopic observing program, it perhaps could be.
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