First Detection of the BAO Signal from Early DESI Data
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| Formato: | Preprint |
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2023
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| author | Moon, Jeongin Valcin, David Rashkovetskyi, Michael Saulder, Christoph Aguilar, Jessica Nicole Ahlen, Steven Alam, Shadab Bailey, Stephen Baltay, Charles Blum, Robert Brooks, David Burtin, Etienne Chaussidon, Edmond Dawson, Kyle de la Macorra, Axel de Mattia, Arnaud Dhungana, Govinda Eisenstein, Daniel Flaugher, Brenna Font-Ribera, Andreu Forero-Romero, Jaime E. Garcia-Quintero, Cristhian Gontcho, Satya Gontcho A Guy, Julien Hanif, Malik Muhammad Sikandar Honscheid, Klaus Ishak, Mustapha Kehoe, Robert Kim, Sumi Kisner, Theodore Kremin, Anthony Landriau, Martin Guillou, Laurent Le Levi, Michael Manera, Marc Martini, Paul McDonald, Patrick Meisner, Aaron Miquel, Ramon Moustakas, John Myers, Adam Nadathur, Seshadri Neveux, Richard Newman, Jeffrey A. Nie, Jundan Padmanabhan, Nikhil Palanque-Delabrouille, Nathalie Percival, Will Fernández, Alejandro Pérez Poppett, Claire Prada, Francisco Raichoor, Anand Ross, Ashley J. Rossi, Graziano Samushia, Lado Schlegel, David Seo, Hee-Jong Tarlé, Gregory Magana, Mariana Vargas Variu, Andrei Weaver, Benjamin Alan White, Martin J. Yèche, Christophe Yuan, Sihan Zhao, Cheng Zhou, Rongpu Zhou, Zhimin Zou, Hu |
| author_facet | Moon, Jeongin Valcin, David Rashkovetskyi, Michael Saulder, Christoph Aguilar, Jessica Nicole Ahlen, Steven Alam, Shadab Bailey, Stephen Baltay, Charles Blum, Robert Brooks, David Burtin, Etienne Chaussidon, Edmond Dawson, Kyle de la Macorra, Axel de Mattia, Arnaud Dhungana, Govinda Eisenstein, Daniel Flaugher, Brenna Font-Ribera, Andreu Forero-Romero, Jaime E. Garcia-Quintero, Cristhian Gontcho, Satya Gontcho A Guy, Julien Hanif, Malik Muhammad Sikandar Honscheid, Klaus Ishak, Mustapha Kehoe, Robert Kim, Sumi Kisner, Theodore Kremin, Anthony Landriau, Martin Guillou, Laurent Le Levi, Michael Manera, Marc Martini, Paul McDonald, Patrick Meisner, Aaron Miquel, Ramon Moustakas, John Myers, Adam Nadathur, Seshadri Neveux, Richard Newman, Jeffrey A. Nie, Jundan Padmanabhan, Nikhil Palanque-Delabrouille, Nathalie Percival, Will Fernández, Alejandro Pérez Poppett, Claire Prada, Francisco Raichoor, Anand Ross, Ashley J. Rossi, Graziano Samushia, Lado Schlegel, David Seo, Hee-Jong Tarlé, Gregory Magana, Mariana Vargas Variu, Andrei Weaver, Benjamin Alan White, Martin J. Yèche, Christophe Yuan, Sihan Zhao, Cheng Zhou, Rongpu Zhou, Zhimin Zou, Hu |
| contents | We present the first detection of the baryon acoustic oscillations (BAO) signal obtained using unblinded data collected during the initial two months of operations of the Stage-IV ground-based Dark Energy Spectroscopic Instrument (DESI). From a selected sample of 261,291 Luminous Red Galaxies spanning the redshift interval 0.4 < z < 1.1 and covering 1651 square degrees with a 57.9% completeness level, we report a ~5 sigma level BAO detection and the measurement of the BAO location at a precision of 1.7%. Using a Bright Galaxy Sample of 109,523 galaxies in the redshift range 0.1 < z < 0.5, over 3677 square degrees with a 50.0% completeness, we also detect the BAO feature at ~3 sigma significance with a 2.6% precision. These first BAO measurements represent an important milestone, acting as a quality control on the optimal performance of the complex robotically-actuated, fiber-fed DESI spectrograph, as well as an early validation of the DESI spectroscopic pipeline and data management system. Based on these first promising results, we forecast that DESI is on target to achieve a high-significance BAO detection at sub-percent precision with the completed 5-year survey data, meeting the top-level science requirements on BAO measurements. This exquisite level of precision will set new standards in cosmology and confirm DESI as the most competitive BAO experiment for the remainder of this decade. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2304_08427 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | First Detection of the BAO Signal from Early DESI Data Moon, Jeongin Valcin, David Rashkovetskyi, Michael Saulder, Christoph Aguilar, Jessica Nicole Ahlen, Steven Alam, Shadab Bailey, Stephen Baltay, Charles Blum, Robert Brooks, David Burtin, Etienne Chaussidon, Edmond Dawson, Kyle de la Macorra, Axel de Mattia, Arnaud Dhungana, Govinda Eisenstein, Daniel Flaugher, Brenna Font-Ribera, Andreu Forero-Romero, Jaime E. Garcia-Quintero, Cristhian Gontcho, Satya Gontcho A Guy, Julien Hanif, Malik Muhammad Sikandar Honscheid, Klaus Ishak, Mustapha Kehoe, Robert Kim, Sumi Kisner, Theodore Kremin, Anthony Landriau, Martin Guillou, Laurent Le Levi, Michael Manera, Marc Martini, Paul McDonald, Patrick Meisner, Aaron Miquel, Ramon Moustakas, John Myers, Adam Nadathur, Seshadri Neveux, Richard Newman, Jeffrey A. Nie, Jundan Padmanabhan, Nikhil Palanque-Delabrouille, Nathalie Percival, Will Fernández, Alejandro Pérez Poppett, Claire Prada, Francisco Raichoor, Anand Ross, Ashley J. Rossi, Graziano Samushia, Lado Schlegel, David Seo, Hee-Jong Tarlé, Gregory Magana, Mariana Vargas Variu, Andrei Weaver, Benjamin Alan White, Martin J. Yèche, Christophe Yuan, Sihan Zhao, Cheng Zhou, Rongpu Zhou, Zhimin Zou, Hu Cosmology and Nongalactic Astrophysics We present the first detection of the baryon acoustic oscillations (BAO) signal obtained using unblinded data collected during the initial two months of operations of the Stage-IV ground-based Dark Energy Spectroscopic Instrument (DESI). From a selected sample of 261,291 Luminous Red Galaxies spanning the redshift interval 0.4 < z < 1.1 and covering 1651 square degrees with a 57.9% completeness level, we report a ~5 sigma level BAO detection and the measurement of the BAO location at a precision of 1.7%. Using a Bright Galaxy Sample of 109,523 galaxies in the redshift range 0.1 < z < 0.5, over 3677 square degrees with a 50.0% completeness, we also detect the BAO feature at ~3 sigma significance with a 2.6% precision. These first BAO measurements represent an important milestone, acting as a quality control on the optimal performance of the complex robotically-actuated, fiber-fed DESI spectrograph, as well as an early validation of the DESI spectroscopic pipeline and data management system. Based on these first promising results, we forecast that DESI is on target to achieve a high-significance BAO detection at sub-percent precision with the completed 5-year survey data, meeting the top-level science requirements on BAO measurements. This exquisite level of precision will set new standards in cosmology and confirm DESI as the most competitive BAO experiment for the remainder of this decade. |
| title | First Detection of the BAO Signal from Early DESI Data |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2304.08427 |