Preliminary Exploration of Areal Density of Angular Momentum for Spiral Galaxies

Lan Zhang, Feilu Wang, Xiangxiang Xue, David Salzmann, Baifei Shen, Zehao Zhong and Gang Zhao


The specific angular momenta (jt) of stars, baryons as a whole and dark matter halos contain clues of vital importance about how galaxies form and evolve. Using a sample of 70 spiral galaxies, we perform a preliminary analysis of jt, and introduce a new quantity, e.g., areal density of angular momentum (ADAM) () as an indication for the existence of jet(s) in spiral galaxies. The percentage of spiral galaxies having jet(s) shows a strong correlation with ADAM, although the present sample is incomplete.


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