Large Diffuse Dwarfs in the Dynamically Cold Triple Galaxy Systems

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

Astrophysics Pub Date : 2024-10-11 DOI:10.1007/s10511-024-09832-3

I. D. Karachentsev, A. E. Nazarova, V. E. Karachentseva

引用次数: 0

Abstract

We report on the discovery of three large diffuse dwarf (LDD) galaxies located in isolated triple systems. They have effective diameters of 3.6 ÷ 10.0 kpc and effective surface brightness of 26.2 ÷ 27.3 ^m/sq. arcsec. We note that the LDD galaxies tend to occur in small groups with a very low dispersion of radial velocities. The total (orbital) mass of the triplets approximately equals to their integral stellar mass within velocity measurement errors. The presence of LDD galaxies in cold multiple systems seems mysterious.

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动态冷三重星系系统中的大型漫射矮星

我们报告了在孤立的三重星系中发现的三个大型弥漫矮星系（LDD）。它们的有效直径为 3.6 ÷ 10.0 千帕，有效表面亮度为 26.2 ÷ 27.3 米/平方角秒。我们注意到，LDD星系往往以小星系群的形式出现，其径向速度的离散度非常低。在速度测量误差范围内，三胞胎的总（轨道）质量大约等于它们的恒星质量。LDD星系出现在冷多星系中似乎很神秘。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.