Study of Star-Forming Regions in the Peculiar Galaxies NGC 660, NGC 1512, NGC 4395, and NGC 4618

TL;DR

This study analyzes star-forming regions in four peculiar galaxies, revealing that IR fluxes are lower than in normal galaxies due to differences in surface brightness and size, influenced by galaxy interactions and morphology.

Contribution

It provides a comparative analysis of SFR characteristics in peculiar galaxies, highlighting how interactions and morphology affect star formation indicators.

Findings

IR fluxes from SFRs are lower than in normal galaxies

Differences in IR fluxes are due to surface brightness and size variations

Star formation processes are influenced by galaxy morphology and interaction signs

Abstract

The star-forming regions (SFRs) in the peculiar galaxies NGC 660, NGC 1512, NGC 4395 and NGC 4618 are studied. The relationships between such characteristics of star forming regions as UV, nearand far-IR fluxes, as well as in the Halpha and HI lines, surface brightness in these ranges, and the scatter of the radial velocities of ionized and neutral hydrogen are considered. It is shown that in all the galaxies considered, the IR fluxes from SFRs are less than in the "normal" galaxies, but for different reasons: in the galaxies with signs of recent interaction NGC 660 and NGC 1512, this is due to the low surface brightness of SFRs; in the lopsided galaxies NGC 4395 and NGC 4618, the low brightness of SFRs in the infrared range is due to their compact size. These differences indicate that the star formation process depends not only on the morphological type of a galaxy, but also on many other factors.