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Abstract <p>The study is devoted to comparing the parameters of the interstellar medium of HII regions in the Kongiu and Groves catalogs for the galaxy NGC 628. The article analyzes the characteristics of star-forming regions, including a comparison of radiation fluxes in the ranges of 7.7 and 21 <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\mu\)</EquationSource> <!--BPhysMGU2570151Smirnova-m1--> </InlineEquation>m and in the H<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\alpha\)</EquationSource> <!--BPhysMGU2570151Smirnova-m2--> </InlineEquation>, H<InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\beta\)</EquationSource> <!--BPhysMGU2570151Smirnova-m3--> </InlineEquation>, OIII, and CO lines, calculating the kinematic parameters (FWHM) for the lines, and analyzing the spatial distribution of regions for both catalogs. The results of the study showed that the regions from the Groves catalog demonstrate higher line widths compared to the Kongiu catalog. Signs of possible misidentified classification of some regions from the Groves catalog were revealed: there is a possibility that some of them are not HII regions, but shock ionization regions.</p>

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HII Regions in NGC 628: The View of Two Catalogs

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • K. I. Smirnova,
  • D. S. Wiebe

摘要

Abstract

The study is devoted to comparing the parameters of the interstellar medium of HII regions in the Kongiu and Groves catalogs for the galaxy NGC 628. The article analyzes the characteristics of star-forming regions, including a comparison of radiation fluxes in the ranges of 7.7 and 21 \(\mu\) m and in the H \(\alpha\) , H \(\beta\) , OIII, and CO lines, calculating the kinematic parameters (FWHM) for the lines, and analyzing the spatial distribution of regions for both catalogs. The results of the study showed that the regions from the Groves catalog demonstrate higher line widths compared to the Kongiu catalog. Signs of possible misidentified classification of some regions from the Groves catalog were revealed: there is a possibility that some of them are not HII regions, but shock ionization regions.