Ionized-gas Metallicity of the Strong [O iii]λ5007 Emission-line Compact Galaxies in the LAMOST Survey
This article reports a sample of 1830 strong [O iii ] λ 5007 emission-line compact galaxies discovered with the LAMOST spectroscopic survey and the photometric catalog of the Sloan Digital Sky Survey. We newly identify 402 spectra of 346 strong [O iii ] λ 5007 emission-line compact galaxies by findi...
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| Format: | Article |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal Supplement Series |
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| Online Access: | https://doi.org/10.3847/1538-4365/acd69c |
| _version_ | 1797694183527415808 |
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| author | Siqi Liu A-Li Luo Wei Zhang Xiao Kong Yan-Xia Zhang Shi-Yin Shen Yong-Heng Zhao |
| author_facet | Siqi Liu A-Li Luo Wei Zhang Xiao Kong Yan-Xia Zhang Shi-Yin Shen Yong-Heng Zhao |
| author_sort | Siqi Liu |
| collection | DOAJ |
| description | This article reports a sample of 1830 strong [O iii ] λ 5007 emission-line compact galaxies discovered with the LAMOST spectroscopic survey and the photometric catalog of the Sloan Digital Sky Survey. We newly identify 402 spectra of 346 strong [O iii ] λ 5007 emission-line compact galaxies by finding compact isolated point sources. Combined with the samples in our previous work, this returns a sample of 1830 unique strong [O iii ] λ 5007 emission-line compact galaxies with 2033 spectra of z ≤ 0.53. For the sources with 2 σ [O iii ] λ 4363 detections, we calculate the gas-phase metallicity with the direct- T _e method, and verify that the strong-line metallicity diagnostics calibrated with the direct- T _e method also applies to this sample. The strong [O iii ] λ 5007 emission-line compact galaxies fall below several T _e -calibrated mass–metallicity relations. The N/O measurements of the strong [O iii ] λ 5007 emission-line compact galaxies mainly locate at a plateau at low metallicity, indicating the product of primary nucleosynthesis. The Ne3O2 and O32 relation follows a tight linear relation with no redshift evolution. The Ne3O2 anticorrelates with the stellar mass, and at fixed stellar mass the Ne3O2 increases with the redshift. Eight sources with asymmetric [O iii ] λ 5007 emission-line profiles have been identified, however with no [O iii ] λ 4363 detection, which proves the rich metal content and complex ionized-gas kinematics within the galaxies. Higher-resolution spectroscopy will be necessary to identify the ionized-gas components in detail. |
| first_indexed | 2024-03-12T02:54:15Z |
| format | Article |
| id | doaj.art-7ea8ac08f230422fbe3257d5f652a44d |
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| issn | 0067-0049 |
| language | English |
| last_indexed | 2024-03-12T02:54:15Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Supplement Series |
| spelling | doaj.art-7ea8ac08f230422fbe3257d5f652a44d2023-09-03T15:25:16ZengIOP PublishingThe Astrophysical Journal Supplement Series0067-00492023-01-0126711610.3847/1538-4365/acd69cIonized-gas Metallicity of the Strong [O iii]λ5007 Emission-line Compact Galaxies in the LAMOST SurveySiqi Liu0https://orcid.org/0000-0002-5345-4175A-Li Luo1https://orcid.org/0000-0001-7865-2648Wei Zhang2https://orcid.org/0000-0002-1783-957XXiao Kong3https://orcid.org/0000-0001-8011-8401Yan-Xia Zhang4https://orcid.org/0000-0002-6610-5265Shi-Yin Shen5https://orcid.org/0000-0002-3073-5871Yong-Heng Zhao6CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories , Beijing 100101, People's Republic of China ; lal@nao.cas.cn; School of Astronomy and Space Science, University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China ; xtwfn@bao.ac.cnCAS Key Laboratory of Optical Astronomy, National Astronomical Observatories , Beijing 100101, People's Republic of China ; lal@nao.cas.cn; School of Astronomy and Space Science, University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China ; xtwfn@bao.ac.cn; College of Computer and Information Management & Institute for Astronomical Science, Dezhou University , Dezhou 253023, People's Republic of ChinaCAS Key Laboratory of Optical Astronomy, National Astronomical Observatories , Beijing 100101, People's Republic of China ; lal@nao.cas.cnCAS Key Laboratory of Optical Astronomy, National Astronomical Observatories , Beijing 100101, People's Republic of China ; lal@nao.cas.cnCAS Key Laboratory of Optical Astronomy, National Astronomical Observatories , Beijing 100101, People's Republic of China ; lal@nao.cas.cn; School of Astronomy and Space Science, University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China ; xtwfn@bao.ac.cnKey Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences , 80 Nandan Road, Shanghai, 200030, People's Republic of China; Key Laboratory for Astrophysics , Shanghai, 200034, People's Republic of ChinaCAS Key Laboratory of Optical Astronomy, National Astronomical Observatories , Beijing 100101, People's Republic of China ; lal@nao.cas.cn; School of Astronomy and Space Science, University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China ; xtwfn@bao.ac.cnThis article reports a sample of 1830 strong [O iii ] λ 5007 emission-line compact galaxies discovered with the LAMOST spectroscopic survey and the photometric catalog of the Sloan Digital Sky Survey. We newly identify 402 spectra of 346 strong [O iii ] λ 5007 emission-line compact galaxies by finding compact isolated point sources. Combined with the samples in our previous work, this returns a sample of 1830 unique strong [O iii ] λ 5007 emission-line compact galaxies with 2033 spectra of z ≤ 0.53. For the sources with 2 σ [O iii ] λ 4363 detections, we calculate the gas-phase metallicity with the direct- T _e method, and verify that the strong-line metallicity diagnostics calibrated with the direct- T _e method also applies to this sample. The strong [O iii ] λ 5007 emission-line compact galaxies fall below several T _e -calibrated mass–metallicity relations. The N/O measurements of the strong [O iii ] λ 5007 emission-line compact galaxies mainly locate at a plateau at low metallicity, indicating the product of primary nucleosynthesis. The Ne3O2 and O32 relation follows a tight linear relation with no redshift evolution. The Ne3O2 anticorrelates with the stellar mass, and at fixed stellar mass the Ne3O2 increases with the redshift. Eight sources with asymmetric [O iii ] λ 5007 emission-line profiles have been identified, however with no [O iii ] λ 4363 detection, which proves the rich metal content and complex ionized-gas kinematics within the galaxies. Higher-resolution spectroscopy will be necessary to identify the ionized-gas components in detail.https://doi.org/10.3847/1538-4365/acd69cCompact galaxies |
| spellingShingle | Siqi Liu A-Li Luo Wei Zhang Xiao Kong Yan-Xia Zhang Shi-Yin Shen Yong-Heng Zhao Ionized-gas Metallicity of the Strong [O iii]λ5007 Emission-line Compact Galaxies in the LAMOST Survey The Astrophysical Journal Supplement Series Compact galaxies |
| title | Ionized-gas Metallicity of the Strong [O iii]λ5007 Emission-line Compact Galaxies in the LAMOST Survey |
| title_full | Ionized-gas Metallicity of the Strong [O iii]λ5007 Emission-line Compact Galaxies in the LAMOST Survey |
| title_fullStr | Ionized-gas Metallicity of the Strong [O iii]λ5007 Emission-line Compact Galaxies in the LAMOST Survey |
| title_full_unstemmed | Ionized-gas Metallicity of the Strong [O iii]λ5007 Emission-line Compact Galaxies in the LAMOST Survey |
| title_short | Ionized-gas Metallicity of the Strong [O iii]λ5007 Emission-line Compact Galaxies in the LAMOST Survey |
| title_sort | ionized gas metallicity of the strong o iii λ5007 emission line compact galaxies in the lamost survey |
| topic | Compact galaxies |
| url | https://doi.org/10.3847/1538-4365/acd69c |
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