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Documents on clusters of galaxies
astro/ph
IFU观测表明晕的质量很大,suggesting that dark matter halos may play a major role in regulating the growth of the supermassive black holes.
arXiv:1203.1651:
Advanced Camera for Surveys General Catalog (ACS-GC). 490,000 astronomical sources (stars + galaxies) ,r edshifts (spectroscopic and photometric) for a considerable fraction (~71%) of the imaging sample. Includes color postage stamps, Galfit residual images, and photometry, structural parameters, and redshifts combined into a single catalog.
arXiv:1203.1693
Bar fraction和星系的颜色,质量有关,与是否AGN没关系。