Preliminary Exploration of Areal Density of Angular Momentum for Spiral Galaxies  

作　　者：Lan Zhang Feilu Wang Xiangxiang Xue David Salzmann Baifei Shen Zehao Zhong Gang Zhao 

机构地区：[1]CAS Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [2]School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 101408,China [3]Institute for Frontiers in Astronomy and Astrophysics,Beijing Normal University,Beijing 102206,China [4]Department of Physics,Shanghai Normal University,Shanghai 200234,China

出　　处：《Research in Astronomy and Astrophysics》2023年第8期1-4,共4页天文和天体物理学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC,grant Nos.11988101 and 12073043);National Key Research and Development Program of China No.2019YFA0405500;the support from CAS Project for Young Scientists in Basic Research grant No.YSBR-062。

摘　　要：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_(*)/(2R_(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.

关 键 词：GALAXIES jets-galaxies spiral-galaxies STATISTICS 

分 类 号：P157.6[天文地球—天文学]