Sub-galactic scaling relations with T$_{\rm e}$-based metallicity of low metallicity regions in galaxies: metal-poor gas inflow may have important effects?

Yao Yao; Haiyang Liu; Xu Kong; Yulong Gao; Guangwen Chen; Xinkai Chen; Zhixiong Liang; Zesen Lin; Yimeng Tang; Hongxin Zhang

doi:10.3847/1538-4357/ac3b55

paper

Sub-galactic scaling relations with T $_{e}$ -based metallicity of low metallicity regions in galaxies: metal-poor gas inflow may have important effects?

arXiv:2111.10748 · doi:10.3847/1538-4357/ac3b55

Abstract

The scaling relationship is a fundamental probe of the evolution of galaxies. Using the integral field spectroscopic data from the Mapping Nearby Galaxies at Apache Point Observatory survey, we select 1698 spaxels with significant detection of the auroral emission line \oiii $λ$ 4363 from 52 galaxies to investigate the scaling relationships at the low-metallicity end. We find that our sample's star formation rate is higher and its metallicity is lower in the scaling relationship than the star-forming sequence after removing the contribution of the Fundamental Metallicity Relation.We also find that the stellar ages of our sample are younger ( $<$ 1 Gyr) and the stellar metallicities are also lower. Morphological parameters from Deep Learning catalog indicate that our galaxies are more likely to be merger. These results suggest that their low metallicity regions may be related to interaction, the inflow of metal-poor gas may dilute the interstellar medium and form new metal-poor stars in these galaxies during interaction.

12 pages, 10 figures, accepted in ApJ

Sub-galactic scaling relations with T $_{e}$ -based metallicity of low metallicity regions in galaxies: metal-poor gas inflow may have important effects?

Abstract

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Sub-galactic scaling relations with Te​-based metallicity of low metallicity regions in galaxies: metal-poor gas inflow may have important effects?

Abstract

References in corpus (9)

Cited by in corpus (2)

Sub-galactic scaling relations with T $_{e}$ -based metallicity of low metallicity regions in galaxies: metal-poor gas inflow may have important effects?