Orientation of the spins of galaxies in the local volume

被引:0
|
作者
Karachentsev, I. D. [1 ]
Zozulia, V. D. [2 ]
机构
[1] Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, Karachay Cherke, Russia
[2] St Petersburg State Univ, Univ Skij Pr 28, St Petersburg 198504, Stary Peterhof, Russia
基金
俄罗斯科学基金会;
关键词
galaxies; kinematics and dynamics - galaxies; spiral; -; structure; cosmology; large-scale structure of Universe; ANGULAR-MOMENTUM; SPIRAL GALAXIES; MOLECULAR GAS; H-ALPHA; MASS-DISTRIBUTION; ROTATION CURVES; ALIGNMENT; KINEMATICS; FILAMENTS; SCALE;
D O I
10.1093/mnras/stad1279
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We estimated the angular momentum, J , of 720 galaxies in the Local Volume with distances r < 12 Mpc. The distribution of the average angular momentum along the Hubble sequence has a maximum at the morphological type T = 4 (Sbc), while the dispersion of the J-values for galaxies is minimal. Among the Local Volume population, 27 elite spiral galaxies stand out, with an angular momentum > 0.15 of the Milky Way, J > 0.15J(MW), making the main contribution ( > 90 per cent ) to the total angular momentum of galaxies in the considered volume. Using observational data on the kinematics and structure of these galaxies, we determined the direction of their spins. We present the first map of the distribution of the spins of 27 nearby massive spiral galaxies in the sky and note that their pattern does not exhibit significant alignment with respect to the Local Sheet plane. The relationship between the magnitude of the angular momentum and stellar mass of the local galaxies is well represented by a power law with an exponent of (5/3) over an interval of six orders of magnitude of the mass of galaxies.
引用
收藏
页码:4740 / 4747
页数:8
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