Scholarlink

Abstract <p>A significant fraction of galaxies show warps in their discs, usually noticeable at its periphery. The exact origin of this phenomenon is not fully established, although multiple warp formation mechanisms are proposed. In this study, we create a sample of more than 1000 distant (<InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(z\lesssim 2.5\)</EquationSource> <!--BPhysMGU2570149Chugunov-m3--> </InlineEquation>) edge-on galaxies imaged by HST and JWST. For these galaxies, we measured characteristics of warps and finally analyze how their parameters and frequency change with time. We focus on our main result that galaxies with strong warps were more prevalent in the past compared to the modern epoch. We check how selection effects and varying image quality between objects in our sample could influence our results and conclude that varying fraction of warped galaxies is not caused by observational effects, but represents a genuine evolution. Such a trend may be consistent with mergers and interactions between galaxies being the primary mechanism of warp formation, as number density of galaxies decreases with time, implying higher rate of mergers and interactions in the past.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Galactic Disc Warps from \(\boldsymbol{z=2.5}\) to Modern Epoch: Ruling Out Observational Effects

  • 期刊论文

  • 发表日期：

    2025年12月1日

查看全文
  • I. V. Chugunov,
  • V. P. Reshetnikov,
  • A. A. Marchuk

摘要

Abstract

A significant fraction of galaxies show warps in their discs, usually noticeable at its periphery. The exact origin of this phenomenon is not fully established, although multiple warp formation mechanisms are proposed. In this study, we create a sample of more than 1000 distant ( \(z\lesssim 2.5\) ) edge-on galaxies imaged by HST and JWST. For these galaxies, we measured characteristics of warps and finally analyze how their parameters and frequency change with time. We focus on our main result that galaxies with strong warps were more prevalent in the past compared to the modern epoch. We check how selection effects and varying image quality between objects in our sample could influence our results and conclude that varying fraction of warped galaxies is not caused by observational effects, but represents a genuine evolution. Such a trend may be consistent with mergers and interactions between galaxies being the primary mechanism of warp formation, as number density of galaxies decreases with time, implying higher rate of mergers and interactions in the past.