Detecting and Characterizing Mg ii Absorption in DESI Survey Validation Quasar Spectra
We present findings of the detection of Magnesium II (Mg ii , λ = 2796, 2803 Å) absorbers from the early data release of the Dark Energy Spectroscopic Instrument (DESI). DESI is projected to obtain spectroscopy of approximately 3 million quasars (QSOs), of which over 99% are anticipated to be at red...
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IOP Publishing
2023-01-01
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| Series: | The Astronomical Journal |
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| Online Access: | https://doi.org/10.3847/1538-3881/ace62c |
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| author | Lucas Napolitano Agnesh Pandey Adam D. Myers Ting-Wen Lan Abhijeet Anand Jessica Aguilar Steven Ahlen David M. Alexander David Brooks Rebecca Canning Chiara Circosta Axel De La Macorra Peter Doel Sarah Eftekharzadeh Victoria A. Fawcett Andreu Font-Ribera Juan Garcia-Bellido Satya Gontcho A Gontcho L. Le Guillou Julien Guy Klaus Honscheid Stephanie Juneau T. Kisner Martin Landriau Aaron M. Meisner Ramon Miquel J. Moustakas Will J. Percival J. Xavier Prochaska Michael Schubnell Gregory Tarlé B. A. Weaver Benjamin Weiner Zhimin Zhou Hu Zou Siwei Zou |
| author_facet | Lucas Napolitano Agnesh Pandey Adam D. Myers Ting-Wen Lan Abhijeet Anand Jessica Aguilar Steven Ahlen David M. Alexander David Brooks Rebecca Canning Chiara Circosta Axel De La Macorra Peter Doel Sarah Eftekharzadeh Victoria A. Fawcett Andreu Font-Ribera Juan Garcia-Bellido Satya Gontcho A Gontcho L. Le Guillou Julien Guy Klaus Honscheid Stephanie Juneau T. Kisner Martin Landriau Aaron M. Meisner Ramon Miquel J. Moustakas Will J. Percival J. Xavier Prochaska Michael Schubnell Gregory Tarlé B. A. Weaver Benjamin Weiner Zhimin Zhou Hu Zou Siwei Zou |
| author_sort | Lucas Napolitano |
| collection | DOAJ |
| description | We present findings of the detection of Magnesium II (Mg ii , λ = 2796, 2803 Å) absorbers from the early data release of the Dark Energy Spectroscopic Instrument (DESI). DESI is projected to obtain spectroscopy of approximately 3 million quasars (QSOs), of which over 99% are anticipated to be at redshifts greater than z > 0.3, such that DESI would be able to observe an associated or intervening Mg ii absorber illuminated by the background QSO. We have developed an autonomous supplementary spectral pipeline that detects these systems through an initial line-fitting process and then confirms the line properties using a Markov Chain Monte Carlo sampler. Based upon a visual inspection of the resulting systems, we estimate that this sample has a purity greater than 99%. We have also investigated the completeness of our sample in regard to both the signal-to-noise properties of the input spectra and the rest-frame equivalent width ( W _0 ) of the absorber systems. From a parent catalog containing 83,207 quasars, we detect a total of 23,921 Mg ii absorption systems following a series of quality cuts. Extrapolating from this occurrence rate of 28.8% implies a catalog at the completion of the five-year DESI survey that will contain over eight hundred thousand Mg ii absorbers. The cataloging of these systems will enable significant further research because they carry information regarding circumgalactic medium environments, the distribution of intervening galaxies, and the growth of metallicity across the redshift range 0.3 ≤ z < 2.5. |
| first_indexed | 2024-03-12T03:49:34Z |
| format | Article |
| id | doaj.art-7cc0289524e64ae688a4e7a095adcae4 |
| institution | Directory Open Access Journal |
| issn | 1538-3881 |
| language | English |
| last_indexed | 2024-03-12T03:49:34Z |
| publishDate | 2023-01-01 |
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| series | The Astronomical Journal |
| spelling | doaj.art-7cc0289524e64ae688a4e7a095adcae42023-09-03T12:33:41ZengIOP PublishingThe Astronomical Journal1538-38812023-01-0116639910.3847/1538-3881/ace62cDetecting and Characterizing Mg ii Absorption in DESI Survey Validation Quasar SpectraLucas Napolitano0https://orcid.org/0000-0002-5166-8671Agnesh Pandey1Adam D. Myers2Ting-Wen Lan3https://orcid.org/0000-0001-8857-7020Abhijeet Anand4https://orcid.org/0000-0003-2923-1585Jessica Aguilar5https://orcid.org/0000-0003-0822-452XSteven Ahlen6https://orcid.org/0000-0001-6098-7247David M. Alexander7https://orcid.org/0000-0002-5896-6313David Brooks8https://orcid.org/0000-0002-8458-5047Rebecca Canning9Chiara Circosta10Axel De La Macorra11Peter Doel12Sarah Eftekharzadeh13Victoria A. Fawcett14https://orcid.org/0000-0003-1251-532XAndreu Font-Ribera15https://orcid.org/0000-0002-3033-7312Juan Garcia-Bellido16https://orcid.org/0000-0002-9370-8360Satya Gontcho A Gontcho17https://orcid.org/0000-0003-3142-233XL. Le Guillou18https://orcid.org/0000-0001-7178-8868Julien Guy19https://orcid.org/0000-0001-9822-6793Klaus Honscheid20Stephanie Juneau21https://orcid.org/0000-0002-0000-2394T. Kisner22https://orcid.org/0000-0003-3510-7134Martin Landriau23https://orcid.org/0000-0003-1838-8528Aaron M. Meisner24https://orcid.org/0000-0002-1125-7384Ramon Miquel25https://orcid.org/0000-0002-6610-4836J. Moustakas26https://orcid.org/0000-0002-2733-4559Will J. Percival27https://orcid.org/0000-0002-0644-5727J. Xavier Prochaska28https://orcid.org/0000-0002-7738-6875Michael Schubnell29Gregory Tarlé30https://orcid.org/0000-0003-1704-0781B. A. Weaver31Benjamin Weiner32https://orcid.org/0000-0001-6065-7483Zhimin Zhou33https://orcid.org/0000-0002-4135-0977Hu Zou34https://orcid.org/0000-0002-6684-3997Siwei Zou35https://orcid.org/0000-0002-3983-6484Department of Physics & Astronomy, University of Wyoming , 1000 E. University, Dept. 3905, Laramie, WY 82071, USADepartment of Physics & Astronomy, University of Wyoming , 1000 E. University, Dept. 3905, Laramie, WY 82071, USADepartment of Physics & Astronomy, University of Wyoming , 1000 E. University, Dept. 3905, Laramie, WY 82071, USAGraduate Institute of Astrophysics and Department of Physics, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, TaiwanLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USALawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USAPhysics Dept., Boston University , 590 Commonwealth Avenue, Boston, MA 02215, USACentre for Extragalactic Astronomy, Department of Physics, Durham University, South Road, Durham, DH1 3LE, UKDepartment of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UKInstitute of Cosmology & Gravitation, University of Portsmouth , Dennis Sciama Building, Portsmouth, PO1 3FX, UKDepartment of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UKInstituto 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, UKUniversities Space Research Association, NASA Ames Research Centre, USACentre for Extragalactic Astronomy, Department of Physics, Durham University, South Road, Durham, DH1 3LE, UK; School of Mathematics, Statistics and Physics, Newcastle University, NE1 7RU, UKInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra Barcelona, SpainInstituto de Física Teórica (IFT) UAM/CSIC, Universidad Autónoma de Madrid, Cantoblanco, E-28049, Madrid, SpainLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA; Department of Physics and Astronomy, University of Rochester , 500 Joseph C. Wilson Boulevard, Rochester, NY 14627, USASorbonne Université, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), F-75005 Paris, FranceLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USACenter for Cosmology and AstroParticle Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210, USA; Department of Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USANSF's National Optical-Infrared Astronomy Research Laboratory, 950 North Cherry Avenue, Tucson, AZ 85719, USALawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USALawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USANSF's NOIRLab, 950 North 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, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. de Lluís Companys 23, E-08010 Barcelona, SpainDepartment of Physics and Astronomy, Siena College, 515 Loudon Road, Loudonville, NY 12211, USADepartment of Physics and Astronomy, University of Waterloo , 200 University Avenue West, Waterloo, ON N2L 3G1, Canada; Perimeter Institute for Theoretical Physics, 31 Caroline Street North, Waterloo, ON N2L 2Y5, Canada; Waterloo Centre for Astrophysics, University of Waterloo , 200 University Avenue West, Waterloo, ON N2L 3G1, CanadaUniversity of California , Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA; Kavli Institute for the Physics and Mathematics of the Universe, 5-1-5 Kashiwanoha, Kashiwa, 277-8583, JapanDepartment of Physics, University of Michigan , 450 Church Street, Ann Arbor, MI 48109, USADepartment of Physics, University of Michigan , 450 Church Street, Ann Arbor, MI 48109, USANSF's NOIRLab, 950 North Cherry Avenue, Tucson, AZ 85719, USASteward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721, USANational Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing, 100012, People’s Republic of ChinaNational Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing, 100012, People’s Republic of ChinaDepartment of Astronomy, Tsinghua University , Beijing 100084, People’s Republic of ChinaWe present findings of the detection of Magnesium II (Mg ii , λ = 2796, 2803 Å) absorbers from the early data release of the Dark Energy Spectroscopic Instrument (DESI). DESI is projected to obtain spectroscopy of approximately 3 million quasars (QSOs), of which over 99% are anticipated to be at redshifts greater than z > 0.3, such that DESI would be able to observe an associated or intervening Mg ii absorber illuminated by the background QSO. We have developed an autonomous supplementary spectral pipeline that detects these systems through an initial line-fitting process and then confirms the line properties using a Markov Chain Monte Carlo sampler. Based upon a visual inspection of the resulting systems, we estimate that this sample has a purity greater than 99%. We have also investigated the completeness of our sample in regard to both the signal-to-noise properties of the input spectra and the rest-frame equivalent width ( W _0 ) of the absorber systems. From a parent catalog containing 83,207 quasars, we detect a total of 23,921 Mg ii absorption systems following a series of quality cuts. Extrapolating from this occurrence rate of 28.8% implies a catalog at the completion of the five-year DESI survey that will contain over eight hundred thousand Mg ii absorbers. The cataloging of these systems will enable significant further research because they carry information regarding circumgalactic medium environments, the distribution of intervening galaxies, and the growth of metallicity across the redshift range 0.3 ≤ z < 2.5.https://doi.org/10.3847/1538-3881/ace62cCatalogsSky surveysCosmologyLarge-scale structure of the universeAGN host galaxiesGalaxies |
| spellingShingle | Lucas Napolitano Agnesh Pandey Adam D. Myers Ting-Wen Lan Abhijeet Anand Jessica Aguilar Steven Ahlen David M. Alexander David Brooks Rebecca Canning Chiara Circosta Axel De La Macorra Peter Doel Sarah Eftekharzadeh Victoria A. Fawcett Andreu Font-Ribera Juan Garcia-Bellido Satya Gontcho A Gontcho L. Le Guillou Julien Guy Klaus Honscheid Stephanie Juneau T. Kisner Martin Landriau Aaron M. Meisner Ramon Miquel J. Moustakas Will J. Percival J. Xavier Prochaska Michael Schubnell Gregory Tarlé B. A. Weaver Benjamin Weiner Zhimin Zhou Hu Zou Siwei Zou Detecting and Characterizing Mg ii Absorption in DESI Survey Validation Quasar Spectra The Astronomical Journal Catalogs Sky surveys Cosmology Large-scale structure of the universe AGN host galaxies Galaxies |
| title | Detecting and Characterizing Mg ii Absorption in DESI Survey Validation Quasar Spectra |
| title_full | Detecting and Characterizing Mg ii Absorption in DESI Survey Validation Quasar Spectra |
| title_fullStr | Detecting and Characterizing Mg ii Absorption in DESI Survey Validation Quasar Spectra |
| title_full_unstemmed | Detecting and Characterizing Mg ii Absorption in DESI Survey Validation Quasar Spectra |
| title_short | Detecting and Characterizing Mg ii Absorption in DESI Survey Validation Quasar Spectra |
| title_sort | detecting and characterizing mg ii absorption in desi survey validation quasar spectra |
| topic | Catalogs Sky surveys Cosmology Large-scale structure of the universe AGN host galaxies Galaxies |
| url | https://doi.org/10.3847/1538-3881/ace62c |
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