Preliminary Exploration of Areal Density of Angular Momentum for Spiral Galaxies
Abstract
The specific angular momenta (jt) of stars, baryons as a whole and dark matter haloes 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) (jt~M/4Rd2) as an indication for the existence of jet in spiral galaxies. The percentage of spiral galaxies having jet(s) shows strong correlation with the ADAM, although the present sample is incomplete.
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