Academic Journal
The Large-scale Structure Supplies the Formation of Gas-star Misaligned Galaxies
| Title: | The Large-scale Structure Supplies the Formation of Gas-star Misaligned Galaxies |
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| Authors: | Min Bao, Yanmei Chen, Qiusheng Gu, Huiyuan Wang, Yong Shi, Peng Wang |
| Source: | The Astrophysical Journal Letters, Vol 982, Iss 1, p L29 (2025) |
| Publisher Information: | IOP Publishing, 2025. |
| Publication Year: | 2025 |
| Collection: | LCC:Astrophysics |
| Subject Terms: | Galaxy kinematics, Galaxy evolution, Astrophysics, QB460-466 |
| More Details: | Using the integral field unit data from the Mapping Nearby Galaxies at Apache Point Observatory survey, we build a sample of gas-star misaligned galaxies. The large-scale environment of misaligned galaxies is dominated by filaments and clusters, while it is less dense relative to the gas-star aligned control galaxies. The direction of the large-scale structure (LSS) is defined by its minor axis ( ${{\boldsymbol{e}}}_{{\bf{3}}}$ ), which indicates the slowest collapsing direction. For the aligned controls, the gas and stellar spins are preferentially perpendicular to ${{\boldsymbol{e}}}_{{\bf{3}}}$ , since these galaxies reside in high-mass host halos. For the misaligned galaxies, the gas spins also tend to be perpendicular to ${{\boldsymbol{e}}}_{{\bf{3}}}$ , suggesting that misaligned gas is recently accreted from the LSS. Meanwhile, there is no correlation between their stellar spins and ${{\boldsymbol{e}}}_{{\bf{3}}}$ . There are two possible explanations for this observational phenomenon: (1) the large-scale environments of misaligned galaxies evolve as they grow, with stellar angular momenta acquired in different environments having different orientations; (2) the correlation between stellar spins and the LSS is smeared out since a relatively higher portion of misaligned galaxies in sheet environments are statistically analyzed together with those in filament environments. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2041-8213 2041-8205 |
| Relation: | https://doaj.org/toc/2041-8205 |
| DOI: | 10.3847/2041-8213/adbc68 |
| Access URL: | https://doaj.org/article/97745b31dd7e4b5b8f6011da28d57988 |
| Accession Number: | edsdoj.97745b31dd7e4b5b8f6011da28d57988 |
| Database: | Directory of Open Access Journals |
| ISSN: | 20418213 20418205 |
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| DOI: | 10.3847/2041-8213/adbc68 |
| Published in: | The Astrophysical Journal Letters |
| Language: | English |