Double-peaked Narrow Emission-Line Galaxies in SDSS-IV MaNGA
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866916361428533248 |
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| author | Qiu, Jiajie Shen, Shiyin Feng, Shuai Chen, Yanmei Chang, Ruixiang Zhao, Qianwen Zeng, Qi |
| author_facet | Qiu, Jiajie Shen, Shiyin Feng, Shuai Chen, Yanmei Chang, Ruixiang Zhao, Qianwen Zeng, Qi |
| contents | Narrow emission lines in a galaxy's spectrum that show double peaks indicate the presence of distinct gas components with different velocities, and its physical origin remains uncertain. This study uses galaxies from the final MaNGA data release to detect double-peaked narrow emission-line spaxels (DPSs) by examining the double Gaussian profiles of the H$ α$-[N \uppercase\expandafter{\romannumeral2}] doublets across all MaNGA spaxels. A total of 5,420 DPSs associated with 304 double-peaked narrow emission-line galaxies (DPGs) are identified, each DPG containing a minimum of 5 DPSs and being free from overlap with other galaxies. We find that DPSs can be categorized into three groups according to their central distance $r/R_e$ and the velocity difference $Δv$ between their two components: the inner low-$Δv$, inner high-$Δv$ and outer DPSs. By incorporating the physical characteristics of the DPGs into their DPSs, we demonstrate for the first time the existence of statistical correlations between barred DPGs and inner low-$Δv$ DPSs, AGN-hosting DPGs and inner high-$Δv$ DPSs, as well as tidal DPGs and outer DPSs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_09750 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Double-peaked Narrow Emission-Line Galaxies in SDSS-IV MaNGA Qiu, Jiajie Shen, Shiyin Feng, Shuai Chen, Yanmei Chang, Ruixiang Zhao, Qianwen Zeng, Qi Astrophysics of Galaxies Narrow emission lines in a galaxy's spectrum that show double peaks indicate the presence of distinct gas components with different velocities, and its physical origin remains uncertain. This study uses galaxies from the final MaNGA data release to detect double-peaked narrow emission-line spaxels (DPSs) by examining the double Gaussian profiles of the H$ α$-[N \uppercase\expandafter{\romannumeral2}] doublets across all MaNGA spaxels. A total of 5,420 DPSs associated with 304 double-peaked narrow emission-line galaxies (DPGs) are identified, each DPG containing a minimum of 5 DPSs and being free from overlap with other galaxies. We find that DPSs can be categorized into three groups according to their central distance $r/R_e$ and the velocity difference $Δv$ between their two components: the inner low-$Δv$, inner high-$Δv$ and outer DPSs. By incorporating the physical characteristics of the DPGs into their DPSs, we demonstrate for the first time the existence of statistical correlations between barred DPGs and inner low-$Δv$ DPSs, AGN-hosting DPGs and inner high-$Δv$ DPSs, as well as tidal DPGs and outer DPSs. |
| title | Double-peaked Narrow Emission-Line Galaxies in SDSS-IV MaNGA |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2408.09750 |