Author:
Zhang Lan,Wang Feilu,Xue Xiangxiang,Salzmann David,Shen Baifei,Zhong Zehao,Zhao Gang
Abstract
Abstract
The specific angular momenta (j
t
) 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 j
t
, and introduce a new quantity, e.g., areal density of angular momentum (ADAM) (
j
t
M
⋆
/
(
2
R
d
)
2
) 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.
Subject
Space and Planetary Science,Astronomy and Astrophysics