The Dark Energy Spectroscopic Instrument: one-dimensional power spectrum from first Ly α forest samples with Fast Fourier Transform

DESI Collaboration; Corentin Ravoux; Marie Lynn Abdul Karim; Eric Armengaud; Michael Walther; Naim Göksel Karaçayll; Paul Martini; Julien Guy; Jessica Nicole Aguilar; Steven Ahlen; Stephen Bailey; Julian Bautista; Sergio Felipe Beltran; David Brooks; Laura Cabayol-Garcia; Solène Chabanier; Edmond Chaussidon; Jonás Chaves-Montero; Kyle Dawson; Rodrigo De La Cruz; Axel De La MacOrra; Peter Doel; Kevin Fanning; Andreu Font-Ribera; Jaime Forero-Romero; Satya Gontcho A. Gontcho; Alma X. Gonzalez-Morales; Calum Gordon; Hiram K. Herrera-Alcantar; Klaus Honscheid; Vid Iršič; Mustapha Ishak; Robert Kehoe; Theodore Kisner; Anthony Kremin; Martin Landriau; Laurent Le Guillou; Michael Levi; Zarija Lukić; Christophe Magneville; Aaron Meisner; Ramon Miquel; John Moustakas; Eva Maria Mueller; Andrea Muñoz-Gutierrez; Lucas Napolitano; Jundan Nie; Gustavo Niz; Nathalie Palanque-Delabrouille; Will Percival; Ignasi Perez-Ràfols

doi:10.1093/mnras/stad3008

The Dark Energy Spectroscopic Instrument: one-dimensional power spectrum from first Ly α forest samples with Fast Fourier Transform

DESI Collaboration, Corentin Ravoux, Marie Lynn Abdul Karim, Eric Armengaud, Michael Walther, Naim Göksel Karaçayll, Paul Martini, Julien Guy, Jessica Nicole Aguilar, Steven Ahlen, Stephen Bailey, Julian Bautista, Sergio Felipe Beltran, David Brooks, Laura Cabayol-Garcia, Solène Chabanier, Edmond Chaussidon, Jonás Chaves-Montero, Kyle Dawson, Rodrigo De La CruzAxel De La MacOrra, Peter Doel, Kevin Fanning, Andreu Font-Ribera, Jaime Forero-Romero, Satya Gontcho A. Gontcho, Alma X. Gonzalez-Morales, Calum Gordon, Hiram K. Herrera-Alcantar, Klaus Honscheid, Vid Iršič, Mustapha Ishak, Robert Kehoe, Theodore Kisner, Anthony Kremin, Martin Landriau, Laurent Le Guillou, Michael Levi, Zarija Lukić, Christophe Magneville, Aaron Meisner, Ramon Miquel, John Moustakas, Eva Maria Mueller, Andrea Muñoz-Gutierrez, Lucas Napolitano, Jundan Nie, Gustavo Niz, Nathalie Palanque-Delabrouille, Will Percival, Ignasi Perez-Ràfols

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

We present the one-dimensional Ly α forest power spectrum measurement using the first data provided by the Dark Energy Spectroscopic Instrument (DESI). The data sample comprises 26 330 quasar spectra, at redshift z > 2.1, contained in the DESI Early Data Release and the first 2 months of the main survey. We employ a Fast Fourier Transform (FFT) estimator and compare the resulting power spectrum to an alternative likelihood-based method in a companion paper. We investigate methodological and instrumental contaminants associated with the new DESI instrument, applying techniques similar to previous Sloan Digital Sky Survey (SDSS) measurements. We use synthetic data based on lognormal approximation to validate and correct our measurement. We compare our resulting power spectrum with previous SDSS and high-resolution measurements. With relatively small number statistics, we successfully perform the FFT measurement, which is already competitive in terms of the scale range. At the end of the DESI survey, we expect a five times larger Ly α forest sample than SDSS, providing an unprecedented precise one-dimensional power spectrum measurement.

Original language	English
Pages (from-to)	5118-5140
Number of pages	23
Journal	Monthly Notices of the Royal Astronomical Society (MNRAS)
Volume	526
Issue number	4
Early online date	5 Oct 2023
DOIs	https://doi.org/10.1093/mnras/stad3008
Publication status	Published - 31 Dec 2023

Keywords

cosmology: observations
intergalactic medium
large-scale structure of Universe

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10.1093/mnras/stad3008Licence: CC BY

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© The Author(s) 2023. Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/).
Final published version, 6.06 MBLicence: CC BY

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DESI Collaboration, Ravoux, C., Abdul Karim, M. L., Armengaud, E., Walther, M., Karaçayll, N. G., Martini, P., Guy, J., Aguilar, J. N., Ahlen, S., Bailey, S., Bautista, J., Beltran, S. F., Brooks, D., Cabayol-Garcia, L., Chabanier, S., Chaussidon, E., Chaves-Montero, J., Dawson, K., ... Perez-Ràfols, I. (2023). The Dark Energy Spectroscopic Instrument: one-dimensional power spectrum from first Ly α forest samples with Fast Fourier Transform. Monthly Notices of the Royal Astronomical Society (MNRAS), 526(4), 5118-5140. https://doi.org/10.1093/mnras/stad3008

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title = "The Dark Energy Spectroscopic Instrument: one-dimensional power spectrum from first Ly α forest samples with Fast Fourier Transform",

abstract = "We present the one-dimensional Ly α forest power spectrum measurement using the first data provided by the Dark Energy Spectroscopic Instrument (DESI). The data sample comprises 26 330 quasar spectra, at redshift z > 2.1, contained in the DESI Early Data Release and the first 2 months of the main survey. We employ a Fast Fourier Transform (FFT) estimator and compare the resulting power spectrum to an alternative likelihood-based method in a companion paper. We investigate methodological and instrumental contaminants associated with the new DESI instrument, applying techniques similar to previous Sloan Digital Sky Survey (SDSS) measurements. We use synthetic data based on lognormal approximation to validate and correct our measurement. We compare our resulting power spectrum with previous SDSS and high-resolution measurements. With relatively small number statistics, we successfully perform the FFT measurement, which is already competitive in terms of the scale range. At the end of the DESI survey, we expect a five times larger Ly α forest sample than SDSS, providing an unprecedented precise one-dimensional power spectrum measurement.",

keywords = "cosmology: observations, intergalactic medium, large-scale structure of Universe",

author = "\{DESI Collaboration\} and Corentin Ravoux and \{Abdul Karim\}, \{Marie Lynn\} and Eric Armengaud and Michael Walther and Kara{\c c}ayll, \{Naim G{\"o}ksel\} and Paul Martini and Julien Guy and Aguilar, \{Jessica Nicole\} and Steven Ahlen and Stephen Bailey and Julian Bautista and Beltran, \{Sergio Felipe\} and David Brooks and Laura Cabayol-Garcia and Sol{\`e}ne Chabanier and Edmond Chaussidon and Jon{\'a}s Chaves-Montero and Kyle Dawson and \{De La Cruz\}, Rodrigo and \{De La MacOrra\}, Axel and Peter Doel and Kevin Fanning and Andreu Font-Ribera and Jaime Forero-Romero and Gontcho, \{Satya Gontcho A.\} and Gonzalez-Morales, \{Alma X.\} and Calum Gordon and Herrera-Alcantar, \{Hiram K.\} and Klaus Honscheid and Vid Ir{\v s}i{\v c} and Mustapha Ishak and Robert Kehoe and Theodore Kisner and Anthony Kremin and Martin Landriau and \{Le Guillou\}, Laurent and Michael Levi and Zarija Luki{\'c} and Christophe Magneville and Aaron Meisner and Ramon Miquel and John Moustakas and Mueller, \{Eva Maria\} and Andrea Mu{\~n}oz-Gutierrez and Lucas Napolitano and Jundan Nie and Gustavo Niz and Nathalie Palanque-Delabrouille and Will Percival and Ignasi Perez-R{\`a}fols",

note = "{\textcopyright} The Author(s) 2023. Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/.",

year = "2023",

month = dec,

day = "31",

doi = "10.1093/mnras/stad3008",

language = "English",

volume = "526",

pages = "5118--5140",

journal = "Monthly Notices of the Royal Astronomical Society (MNRAS)",

issn = "0035-8711",

publisher = "Oxford University Press (OUP)",

number = "4",

}

DESI Collaboration, Ravoux, C, Abdul Karim, ML, Armengaud, E, Walther, M, Karaçayll, NG, Martini, P, Guy, J, Aguilar, JN, Ahlen, S, Bailey, S, Bautista, J, Beltran, SF, Brooks, D, Cabayol-Garcia, L, Chabanier, S, Chaussidon, E, Chaves-Montero, J, Dawson, K, De La Cruz, R, De La MacOrra, A, Doel, P, Fanning, K, Font-Ribera, A, Forero-Romero, J, Gontcho, SGA, Gonzalez-Morales, AX, Gordon, C, Herrera-Alcantar, HK, Honscheid, K, Iršič, V, Ishak, M, Kehoe, R, Kisner, T, Kremin, A, Landriau, M, Le Guillou, L, Levi, M, Lukić, Z, Magneville, C, Meisner, A, Miquel, R, Moustakas, J, Mueller, EM, Muñoz-Gutierrez, A, Napolitano, L, Nie, J, Niz, G, Palanque-Delabrouille, N, Percival, W & Perez-Ràfols, I 2023, 'The Dark Energy Spectroscopic Instrument: one-dimensional power spectrum from first Ly α forest samples with Fast Fourier Transform', Monthly Notices of the Royal Astronomical Society (MNRAS), vol. 526, no. 4, pp. 5118-5140. https://doi.org/10.1093/mnras/stad3008

The Dark Energy Spectroscopic Instrument: one-dimensional power spectrum from first Ly α forest samples with Fast Fourier Transform. / DESI Collaboration; Ravoux, Corentin; Abdul Karim, Marie Lynn et al.
In: Monthly Notices of the Royal Astronomical Society (MNRAS), Vol. 526, No. 4, 31.12.2023, p. 5118-5140.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - The Dark Energy Spectroscopic Instrument: one-dimensional power spectrum from first Ly α forest samples with Fast Fourier Transform

AU - DESI Collaboration

AU - Ravoux, Corentin

AU - Abdul Karim, Marie Lynn

AU - Armengaud, Eric

AU - Walther, Michael

AU - Karaçayll, Naim Göksel

AU - Martini, Paul

AU - Guy, Julien

AU - Aguilar, Jessica Nicole

AU - Ahlen, Steven

AU - Bailey, Stephen

AU - Bautista, Julian

AU - Beltran, Sergio Felipe

AU - Brooks, David

AU - Cabayol-Garcia, Laura

AU - Chabanier, Solène

AU - Chaussidon, Edmond

AU - Chaves-Montero, Jonás

AU - Dawson, Kyle

AU - De La Cruz, Rodrigo

AU - De La MacOrra, Axel

AU - Doel, Peter

AU - Fanning, Kevin

AU - Font-Ribera, Andreu

AU - Forero-Romero, Jaime

AU - Gontcho, Satya Gontcho A.

AU - Gonzalez-Morales, Alma X.

AU - Gordon, Calum

AU - Herrera-Alcantar, Hiram K.

AU - Honscheid, Klaus

AU - Iršič, Vid

AU - Ishak, Mustapha

AU - Kehoe, Robert

AU - Kisner, Theodore

AU - Kremin, Anthony

AU - Landriau, Martin

AU - Le Guillou, Laurent

AU - Levi, Michael

AU - Lukić, Zarija

AU - Magneville, Christophe

AU - Meisner, Aaron

AU - Miquel, Ramon

AU - Moustakas, John

AU - Mueller, Eva Maria

AU - Muñoz-Gutierrez, Andrea

AU - Napolitano, Lucas

AU - Nie, Jundan

AU - Niz, Gustavo

AU - Palanque-Delabrouille, Nathalie

AU - Percival, Will

AU - Perez-Ràfols, Ignasi

N1 - © The Author(s) 2023. Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/.

PY - 2023/12/31

Y1 - 2023/12/31

N2 - We present the one-dimensional Ly α forest power spectrum measurement using the first data provided by the Dark Energy Spectroscopic Instrument (DESI). The data sample comprises 26 330 quasar spectra, at redshift z > 2.1, contained in the DESI Early Data Release and the first 2 months of the main survey. We employ a Fast Fourier Transform (FFT) estimator and compare the resulting power spectrum to an alternative likelihood-based method in a companion paper. We investigate methodological and instrumental contaminants associated with the new DESI instrument, applying techniques similar to previous Sloan Digital Sky Survey (SDSS) measurements. We use synthetic data based on lognormal approximation to validate and correct our measurement. We compare our resulting power spectrum with previous SDSS and high-resolution measurements. With relatively small number statistics, we successfully perform the FFT measurement, which is already competitive in terms of the scale range. At the end of the DESI survey, we expect a five times larger Ly α forest sample than SDSS, providing an unprecedented precise one-dimensional power spectrum measurement.

AB - We present the one-dimensional Ly α forest power spectrum measurement using the first data provided by the Dark Energy Spectroscopic Instrument (DESI). The data sample comprises 26 330 quasar spectra, at redshift z > 2.1, contained in the DESI Early Data Release and the first 2 months of the main survey. We employ a Fast Fourier Transform (FFT) estimator and compare the resulting power spectrum to an alternative likelihood-based method in a companion paper. We investigate methodological and instrumental contaminants associated with the new DESI instrument, applying techniques similar to previous Sloan Digital Sky Survey (SDSS) measurements. We use synthetic data based on lognormal approximation to validate and correct our measurement. We compare our resulting power spectrum with previous SDSS and high-resolution measurements. With relatively small number statistics, we successfully perform the FFT measurement, which is already competitive in terms of the scale range. At the end of the DESI survey, we expect a five times larger Ly α forest sample than SDSS, providing an unprecedented precise one-dimensional power spectrum measurement.

KW - cosmology: observations

KW - intergalactic medium

KW - large-scale structure of Universe

UR - https://www.scopus.com/pages/publications/85176553939

U2 - 10.1093/mnras/stad3008

DO - 10.1093/mnras/stad3008

M3 - Article

AN - SCOPUS:85176553939

SN - 0035-8711

VL - 526

SP - 5118

EP - 5140

JO - Monthly Notices of the Royal Astronomical Society (MNRAS)

JF - Monthly Notices of the Royal Astronomical Society (MNRAS)

IS - 4

ER -

The Dark Energy Spectroscopic Instrument: one-dimensional power spectrum from first Ly α forest samples with Fast Fourier Transform

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