A Systematic Search for Galaxies with Extended Emission Line and Potential Outflows in JADES Medium-Band Images
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arXiv
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| Natura: | Preprint |
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2024
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| author | Zhu, Yongda Rieke, Marcia J. Ji, Zhiyuan Simmonds, Charlotte Sun, Fengwu Sun, Yang Alberts, Stacey Bhatawdekar, Rachana Bunker, Andrew J. Cargile, Phillip A. Carniani, Stefano de Graaff, Anna Hainline, Kevin Helton, Jakob M. Jones, Gareth C. Lyu, Jianwei Rieke, George H. Rinaldi, Pierluigi Robertson, Brant Scholtz, Jan Übler, Hannah Williams, Christina C. Willmer, Christopher N. A. |
| author_facet | Zhu, Yongda Rieke, Marcia J. Ji, Zhiyuan Simmonds, Charlotte Sun, Fengwu Sun, Yang Alberts, Stacey Bhatawdekar, Rachana Bunker, Andrew J. Cargile, Phillip A. Carniani, Stefano de Graaff, Anna Hainline, Kevin Helton, Jakob M. Jones, Gareth C. Lyu, Jianwei Rieke, George H. Rinaldi, Pierluigi Robertson, Brant Scholtz, Jan Übler, Hannah Williams, Christina C. Willmer, Christopher N. A. |
| contents | For the first time, we present a systematic search for galaxies with extended emission line and potential outflow features using \textit{JWST} medium-band images in the GOODS-S field. This is done by comparing the morphology in medium-band images to adjacent continuum and UV bands. We look for galaxies that have a maximum extent 50\% larger, an excess area 30\% greater, or an axis ratio difference of more than 0.3 in the medium band compared to the reference bands. After visual inspection, we find 326 candidate galaxies at $1.4 < z < 8.4$, with a peak in the population near cosmic noon, benefiting from the good coverage of the medium-band filters. By fitting their SEDs, we find that the candidate galaxies are at least 20\% more bursty in their star-forming activity and have 50\% more young stellar populations compared to a control sample selected based on the continuum band flux. Additionally, these candidates exhibit a significantly higher production rate of ionizing photons. We further find that candidates hosting known AGN produce extended emission that is more anisotropic compared to non-AGN candidates. A few of our candidates have been spectroscopically confirmed to have prominent outflow signatures through NIRSpec observations, showcasing the robustness of the photometric selection. Future spectroscopic follow-up will better help verify and characterize the kinematics and chemical properties of these systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_11464 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A Systematic Search for Galaxies with Extended Emission Line and Potential Outflows in JADES Medium-Band Images Zhu, Yongda Rieke, Marcia J. Ji, Zhiyuan Simmonds, Charlotte Sun, Fengwu Sun, Yang Alberts, Stacey Bhatawdekar, Rachana Bunker, Andrew J. Cargile, Phillip A. Carniani, Stefano de Graaff, Anna Hainline, Kevin Helton, Jakob M. Jones, Gareth C. Lyu, Jianwei Rieke, George H. Rinaldi, Pierluigi Robertson, Brant Scholtz, Jan Übler, Hannah Williams, Christina C. Willmer, Christopher N. A. Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics For the first time, we present a systematic search for galaxies with extended emission line and potential outflow features using \textit{JWST} medium-band images in the GOODS-S field. This is done by comparing the morphology in medium-band images to adjacent continuum and UV bands. We look for galaxies that have a maximum extent 50\% larger, an excess area 30\% greater, or an axis ratio difference of more than 0.3 in the medium band compared to the reference bands. After visual inspection, we find 326 candidate galaxies at $1.4 < z < 8.4$, with a peak in the population near cosmic noon, benefiting from the good coverage of the medium-band filters. By fitting their SEDs, we find that the candidate galaxies are at least 20\% more bursty in their star-forming activity and have 50\% more young stellar populations compared to a control sample selected based on the continuum band flux. Additionally, these candidates exhibit a significantly higher production rate of ionizing photons. We further find that candidates hosting known AGN produce extended emission that is more anisotropic compared to non-AGN candidates. A few of our candidates have been spectroscopically confirmed to have prominent outflow signatures through NIRSpec observations, showcasing the robustness of the photometric selection. Future spectroscopic follow-up will better help verify and characterize the kinematics and chemical properties of these systems. |
| title | A Systematic Search for Galaxies with Extended Emission Line and Potential Outflows in JADES Medium-Band Images |
| topic | Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2409.11464 |