A Large Sample of Extremely Metal-poor Galaxies at z < 1 Identified from the DESI Early Data
Extremely metal-poor galaxies (XMPGs) at relatively low redshift are excellent laboratories for studying galaxy formation and evolution in the early universe. Much effort has been spent on identifying them from large-scale spectroscopic surveys or spectroscopic follow-up observations. Previous work...
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IOP Publishing
2024-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ad1409 |
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| author | Hu Zou Jipeng Sui Amélie Saintonge Dirk Scholte John Moustakas Malgorzata Siudek Arjun Dey Stephanie Juneau Weijian Guo Rebecca Canning J. Aguilar S. Ahlen D. Brooks T. Claybaugh K. Dawson A. de la Macorra P. Doel J. E. Forero-Romero S. Gontcho A Gontcho K. Honscheid M. Landriau L. Le Guillou M. Manera A. Meisner R. Miquel Jundan Nie C. Poppett M. Rezaie G. Rossi E. Sanchez M. Schubnell H. Seo G. Tarlé Zhimin Zhou Siwei Zou |
| author_facet | Hu Zou Jipeng Sui Amélie Saintonge Dirk Scholte John Moustakas Malgorzata Siudek Arjun Dey Stephanie Juneau Weijian Guo Rebecca Canning J. Aguilar S. Ahlen D. Brooks T. Claybaugh K. Dawson A. de la Macorra P. Doel J. E. Forero-Romero S. Gontcho A Gontcho K. Honscheid M. Landriau L. Le Guillou M. Manera A. Meisner R. Miquel Jundan Nie C. Poppett M. Rezaie G. Rossi E. Sanchez M. Schubnell H. Seo G. Tarlé Zhimin Zhou Siwei Zou |
| author_sort | Hu Zou |
| collection | DOAJ |
| description | Extremely metal-poor galaxies (XMPGs) at relatively low redshift are excellent laboratories for studying galaxy formation and evolution in the early universe. Much effort has been spent on identifying them from large-scale spectroscopic surveys or spectroscopic follow-up observations. Previous work has identified a few hundred XMPGs. In this work, we obtain a large sample of 223 XMPGs at z < 1 from the early data of the Dark Energy Spectroscopic Instrument (DESI). The oxygen abundance is determined using the direct T _e method based on the detection of the [O iii ] λ 4363 line. The sample includes 95 confirmed XMPGs based on the oxygen abundance uncertainty; the remaining 128 galaxies are regarded as XMPG candidates. These XMPGs are only 0.01% of the total DESI observed galaxies. Their coordinates and other properties are provided in the paper. The most XMPGs have an oxygen abundance of ∼1/34 Z _⊙ , a stellar mass of about 1.5 × 10 ^7 M _⊙, and a star formation rate of 0.22 M _⊙ yr ^−1 . The two most XMPGs present distinct morphologies suggesting different formation mechanisms. The local environmental investigation shows that XMPGs preferentially reside in relatively low-density regions. Many of them fall below the stellar mass–metallicity relations (MZRs) of normal star-forming galaxies. From a comparison of the MZR with theoretical simulations, it appears that XMPGs are good analogs to high-redshift star-forming galaxies. The nature of these XMPG populations will be further investigated in detail with larger and more complete samples from the ongoing DESI survey. |
| first_indexed | 2024-03-08T11:51:49Z |
| format | Article |
| id | doaj.art-dad8a638fd0b498a89b65abe7d01ff07 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-08T11:51:49Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj.art-dad8a638fd0b498a89b65abe7d01ff072024-01-24T09:42:07ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-01961217310.3847/1538-4357/ad1409A Large Sample of Extremely Metal-poor Galaxies at z < 1 Identified from the DESI Early DataHu Zou0https://orcid.org/0000-0002-6684-3997Jipeng Sui1Amélie Saintonge2https://orcid.org/0000-0003-4357-3450Dirk Scholte3https://orcid.org/0000-0002-6867-1244John Moustakas4https://orcid.org/0000-0002-2733-4559Malgorzata Siudek5Arjun Dey6Stephanie Juneau7Weijian Guo8https://orcid.org/0000-0001-9457-0589Rebecca Canning9J. Aguilar10S. Ahlen11https://orcid.org/0000-0001-6098-7247D. Brooks12T. Claybaugh13K. Dawson14A. de la Macorra15https://orcid.org/0000-0002-1769-1640P. Doel16J. E. Forero-Romero17https://orcid.org/0000-0002-2890-3725S. Gontcho A Gontcho18https://orcid.org/0000-0003-3142-233XK. Honscheid19M. Landriau20https://orcid.org/0000-0003-1838-8528L. Le Guillou21https://orcid.org/0000-0001-7178-8868M. Manera22https://orcid.org/0000-0003-4962-8934A. Meisner23https://orcid.org/0000-0002-1125-7384R. Miquel24https://orcid.org/0000-0002-6610-4836Jundan Nie25https://orcid.org/0000-0001-6590-8122C. Poppett26M. Rezaie27https://orcid.org/0000-0001-5589-7116G. Rossi28E. Sanchez29https://orcid.org/0000-0002-9646-8198M. Schubnell30H. Seo31https://orcid.org/0000-0002-6588-3508G. Tarlé32https://orcid.org/0000-0003-1704-0781Zhimin Zhou33https://orcid.org/0000-0002-4135-0977Siwei Zou34https://orcid.org/0000-0002-3983-6484Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China zouhu@nao.cas.cn; School of Astronomy and Space Science, University of Chinese Academy of Sciences , Beijing 101408, People's Republic of ChinaKey Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China zouhu@nao.cas.cn; School of Astronomy and Space Science, University of Chinese Academy of Sciences , Beijing 101408, People's Republic of ChinaDepartment of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UKDepartment of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UKDepartment of Physics and Astronomy, Siena College , 515 Loudon Road, Loudonville, NY 12211, USAInstitute of Space Sciences , ICE-CSIC, Campus UAB, Carrer de Can Magrans s/n, E-08913 Bellaterra, Barcelona, SpainNSF’s NOIRLab , 950 N. Cherry Avenue, Tucson, AZ 85719, USANSF’s NOIRLab , 950 N. Cherry Avenue, Tucson, AZ 85719, USAKey Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China zouhu@nao.cas.cnInstitute of Cosmology & Gravitation, University of Portsmouth , Dennis Sciama Building, Portsmouth, PO1 3FX, UKLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USAPhysics Dept., Boston University , 590 Commonwealth Avenue, Boston, MA 02215, USADepartment of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UKLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USADepartment of Physics and Astronomy, The University of Utah , 115 South 1400 East, Salt Lake City, UT 84112, USAInstituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510, MéxicoDepartment of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UKObservatorio Astronómico, Universidad de los Andes , Cra. 1 No. 18A-10, Edificio H, CP 111711 Bogotá, ColombiaLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USADepartment of Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USALawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USASorbonne Université , CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), F-75005 Paris, FranceInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra, Barcelona, SpainNSF’s NOIRLab , 950 N. Cherry Avenue, Tucson, AZ 85719, USAInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra, Barcelona, SpainKey Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China zouhu@nao.cas.cnSpace Sciences Laboratory, University of California , Berkeley, 7 Gauss Way, Berkeley, CA 94720, USADepartment of Physics, Kansas State University , 116 Cardwell Hall, Manhattan, KS 66506, USADepartment of Physics and Astronomy, Sejong University , Seoul, 143-747, Republic of KoreaCentro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT) , Madrid, SpainDepartment of Physics & Astronomy, Ohio University , Athens, OH 45701, USADepartment of Physics & Astronomy, Ohio University , Athens, OH 45701, USAUniversity of Michigan , Ann Arbor, MI 48109, USAKey Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China zouhu@nao.cas.cnDepartment of Astronomy, Tsinghua University , 30 Shuangqing Road, Haidian District, Beijing, 100190, People's Republic of ChinaExtremely metal-poor galaxies (XMPGs) at relatively low redshift are excellent laboratories for studying galaxy formation and evolution in the early universe. Much effort has been spent on identifying them from large-scale spectroscopic surveys or spectroscopic follow-up observations. Previous work has identified a few hundred XMPGs. In this work, we obtain a large sample of 223 XMPGs at z < 1 from the early data of the Dark Energy Spectroscopic Instrument (DESI). The oxygen abundance is determined using the direct T _e method based on the detection of the [O iii ] λ 4363 line. The sample includes 95 confirmed XMPGs based on the oxygen abundance uncertainty; the remaining 128 galaxies are regarded as XMPG candidates. These XMPGs are only 0.01% of the total DESI observed galaxies. Their coordinates and other properties are provided in the paper. The most XMPGs have an oxygen abundance of ∼1/34 Z _⊙ , a stellar mass of about 1.5 × 10 ^7 M _⊙, and a star formation rate of 0.22 M _⊙ yr ^−1 . The two most XMPGs present distinct morphologies suggesting different formation mechanisms. The local environmental investigation shows that XMPGs preferentially reside in relatively low-density regions. Many of them fall below the stellar mass–metallicity relations (MZRs) of normal star-forming galaxies. From a comparison of the MZR with theoretical simulations, it appears that XMPGs are good analogs to high-redshift star-forming galaxies. The nature of these XMPG populations will be further investigated in detail with larger and more complete samples from the ongoing DESI survey.https://doi.org/10.3847/1538-4357/ad1409MetallicityScaling relationsDwarf galaxiesRedshift surveys |
| spellingShingle | Hu Zou Jipeng Sui Amélie Saintonge Dirk Scholte John Moustakas Malgorzata Siudek Arjun Dey Stephanie Juneau Weijian Guo Rebecca Canning J. Aguilar S. Ahlen D. Brooks T. Claybaugh K. Dawson A. de la Macorra P. Doel J. E. Forero-Romero S. Gontcho A Gontcho K. Honscheid M. Landriau L. Le Guillou M. Manera A. Meisner R. Miquel Jundan Nie C. Poppett M. Rezaie G. Rossi E. Sanchez M. Schubnell H. Seo G. Tarlé Zhimin Zhou Siwei Zou A Large Sample of Extremely Metal-poor Galaxies at z < 1 Identified from the DESI Early Data The Astrophysical Journal Metallicity Scaling relations Dwarf galaxies Redshift surveys |
| title | A Large Sample of Extremely Metal-poor Galaxies at z < 1 Identified from the DESI Early Data |
| title_full | A Large Sample of Extremely Metal-poor Galaxies at z < 1 Identified from the DESI Early Data |
| title_fullStr | A Large Sample of Extremely Metal-poor Galaxies at z < 1 Identified from the DESI Early Data |
| title_full_unstemmed | A Large Sample of Extremely Metal-poor Galaxies at z < 1 Identified from the DESI Early Data |
| title_short | A Large Sample of Extremely Metal-poor Galaxies at z < 1 Identified from the DESI Early Data |
| title_sort | large sample of extremely metal poor galaxies at z 1 identified from the desi early data |
| topic | Metallicity Scaling relations Dwarf galaxies Redshift surveys |
| url | https://doi.org/10.3847/1538-4357/ad1409 |
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