Intrinsic Morphology of The Stellar Components in HI-bearing Dwarf Galaxies and The Dependence on Mass
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866912010779754496 |
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| author | Rong, Yu He, Min Hu, Huijie Zhang, Hong-Xin Wang, Hui-Yuan |
| author_facet | Rong, Yu He, Min Hu, Huijie Zhang, Hong-Xin Wang, Hui-Yuan |
| contents | The intrinsic morphology of stellar components within HI-bearing dwarf galaxies remains a topic of uncertainty. Leveraging the galaxy dataset derived from the cross-matched catalog of the Arecibo Legacy Fast Arecibo L-band Feed Array HI 21cm line survey and the Sloan Digital Sky Survey, we employ a Markov Chain Monte Carlo methodology and assume a triaxial model to scrutinize the inherent stellar distributions of these HI-bearing dwarf galaxies. Our analysis indicates a preference for oblate-triaxial models with $C<B\lesssim A$, indicative of thick stellar disks, characterizing the stellar components in these HI-bearing dwarfs with stellar masses ranging between $10^7\--10^{9.5}\ M_{\odot}$. The average thickness of the stellar components in HI-bearing dwarf galaxies approximates $C/A\sim 0.4$. Furthermore, we observe that the thickness of the stellar disks exhibits weak or negligible dependence on the stellar masses of HI-bearing galaxies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_00944 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Intrinsic Morphology of The Stellar Components in HI-bearing Dwarf Galaxies and The Dependence on Mass Rong, Yu He, Min Hu, Huijie Zhang, Hong-Xin Wang, Hui-Yuan Astrophysics of Galaxies The intrinsic morphology of stellar components within HI-bearing dwarf galaxies remains a topic of uncertainty. Leveraging the galaxy dataset derived from the cross-matched catalog of the Arecibo Legacy Fast Arecibo L-band Feed Array HI 21cm line survey and the Sloan Digital Sky Survey, we employ a Markov Chain Monte Carlo methodology and assume a triaxial model to scrutinize the inherent stellar distributions of these HI-bearing dwarf galaxies. Our analysis indicates a preference for oblate-triaxial models with $C<B\lesssim A$, indicative of thick stellar disks, characterizing the stellar components in these HI-bearing dwarfs with stellar masses ranging between $10^7\--10^{9.5}\ M_{\odot}$. The average thickness of the stellar components in HI-bearing dwarf galaxies approximates $C/A\sim 0.4$. Furthermore, we observe that the thickness of the stellar disks exhibits weak or negligible dependence on the stellar masses of HI-bearing galaxies. |
| title | Intrinsic Morphology of The Stellar Components in HI-bearing Dwarf Galaxies and The Dependence on Mass |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2409.00944 |