局部体积中星系的运动距离

IF 0.6 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS

Astrophysics Pub Date : 2025-01-17 DOI:10.1007/s10511-025-09842-9

I. D. Karachentsev, A. A. Popova

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引用次数: 0

摘要

我们考虑了基于Cosmic-flow-3巡天数据的数值作用法（Numerical Action Method， NAM）得到的邻近星系的运动距离。将nama距离与哈勃空间望远镜采用红巨星分支尖端（TRGB）方法测量的418个高精度距离进行了比较。我们估计了平均差值<；DNAM - DTRGB >；= -0.30±0.08 Mpc，标准差为1.57 Mpc。与通过已知星系群的成员关系或从Tully-Fisher关系获得的较不精确的距离估计相比，在距离尺度上获得了大致相同的差异。我们得出的结论是，在局部体积内，NAM方法提供的距离估计精度为20%，这对约90%的天空有效，除了室女座星系团和Coma-I群的区域。

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Kinematic Distances of Galaxies in the Local Volume

We consider the kinematic distances to nearby galaxies obtained by the Numerical Action Method (NAM) based on the Cosmic-flow-3 survey data. NAM-distances are compared with 418 high-precision distances measured by the Tip of the Red Giant Branch (TRGB) method using the Hubble Space Telescope. We estimated the average difference <D_NAM - D_TRGB > = -0.30 ± 0.08 Mpc and the standard deviation of 1.57 Mpc. Approximately the same difference in the distance scale is obtained in comparison with less accurate distance estimates through the membership of galaxies in known groups or from the Tully-Fisher relation. We conclude that the NAM method provides distance estimates with an accuracy of 20% within the Local Volume, which is valid for ~90% of the sky, except for the regions of the Virgo cluster and the Coma-I group.

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来源期刊

Astrophysics 地学天文-天文与天体物理

CiteScore

0.90

自引率

20.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Astrophysics (Ap) is a peer-reviewed scientific journal which publishes research in theoretical and observational astrophysics. Founded by V.A.Ambartsumian in 1965 Astrophysics is one of the international astronomy journals. The journal covers space astrophysics, stellar and galactic evolution, solar physics, stellar and planetary atmospheres, interstellar matter. Additional subjects include chemical composition and internal structure of stars, quasars and pulsars, developments in modern cosmology and radiative transfer.