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) (jtM⋆/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.
@article{arxiv.2308.10519,
title = {Preliminary Exploration of Areal Density of Angular Momentum for Spiral Galaxies},
author = {Lan Zhang and Feilu Wang and Xiangxiang Xue and David Salzmann and Baifei Shen and Zehao Zhong and Gang Zhao},
journal= {arXiv preprint arXiv:2308.10519},
year = {2023}
}