The baryonic Tully-Fisher relation of HI-bearing low-surface brightness galaxies implies their formation mechanism
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866916652971458560 |
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| author | Hua, Zichen Rong, Yu Hu, Hui-jie |
| author_facet | Hua, Zichen Rong, Yu Hu, Hui-jie |
| contents | We investigate the baryonic Tully-Fisher relation in low surface brightness galaxies selected from the Arecibo Legacy Fast ALFA survey. We find that the $\rm HI$-bearing low surface brightness galaxies still follow the baryonic Tully-Fisher relation of typical late-type galaxies, with a slope of approximately 4 in the baryonic mass versus rotational velocity diagram on the logarithmic scale, i.e., $M_{\rm{b}}\propto v_{\rm{rot}}^4$. Our findings suggest that the matter distributions in low surface brightness galaxies may resemble that of general late-type galaxies, and hint that low surface brightness galaxies may not originate from dark matter halos of low densities or stronger/weaker feedback processes, but may emerge from dark matter halos with high spin values. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2403_16754 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The baryonic Tully-Fisher relation of HI-bearing low-surface brightness galaxies implies their formation mechanism Hua, Zichen Rong, Yu Hu, Hui-jie Astrophysics of Galaxies We investigate the baryonic Tully-Fisher relation in low surface brightness galaxies selected from the Arecibo Legacy Fast ALFA survey. We find that the $\rm HI$-bearing low surface brightness galaxies still follow the baryonic Tully-Fisher relation of typical late-type galaxies, with a slope of approximately 4 in the baryonic mass versus rotational velocity diagram on the logarithmic scale, i.e., $M_{\rm{b}}\propto v_{\rm{rot}}^4$. Our findings suggest that the matter distributions in low surface brightness galaxies may resemble that of general late-type galaxies, and hint that low surface brightness galaxies may not originate from dark matter halos of low densities or stronger/weaker feedback processes, but may emerge from dark matter halos with high spin values. |
| title | The baryonic Tully-Fisher relation of HI-bearing low-surface brightness galaxies implies their formation mechanism |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2403.16754 |