Journal of Cosmology and Astroparticle Physics

, том 2025 , издание 01 , страницы 140

Characterization of contaminants in the Lyman-alpha forest auto-correlation with DESI

Julien Guy ^{1, 2}

S. Gontcho A. Gontcho ^{1, 2}

E. Armengaud ^{3, 4}

Allyson Brodzeller ^{5, 6}

A. Cuceu ^{7, 8, 9}

Andreu Font-Ribera ^{10, 11, 12, 13}

Hiram K. Herrera-Alcantar ^{14, 15}

N. G. Karaçaylı ^{7, 9, 16, 17, 18, 19, 20}

A. Muñoz-Gutiérrez ²¹

Andrea Muñoz‐Gutiérrez ²²

M. M. Pieri ²³

M. Pieri ²⁴

Ignasi Pérez-Ràfols ^{25, 26}

C. Ramírez-Pérez ¹²

César Ramírez-Pérez ¹⁰

C Ravoux ^{3, 4, 27, 28, 29, 30}

J. Rich ^{31, 32}

Jeffrey A. Rich ^{3, 33}

M. Walther ^{34, 35, 36, 37}

Marie Lynn Abdul Karim ^{3, 4}

J. Aguilar ¹

S. Ahlen ^{38, 39}

A. Bault ^{40, 41}

D. Brooks ¹³

David H. Brooks ¹¹

T. Claybaugh ²

Todd Claybaugh ¹

Rodrigo de la Cruz ^{14, 15}

Axel de la Macorra ^{21, 22}

P. Doel ^{11, 13}

K. Fanning ^{42, 43, 44}

Jaime E. Forero-Romero ^{45, 46, 47}

E Gaztañaga ^{48, 49, 50}

E. Gaztanaga ^{51, 52}

Alma X. Gonzalez-Morales ^{14, 15, 53, 54}

G. Gutierrez ^{55, 56}

ChangHoon Hahn ^{57, 58}

K. Honscheid ^{7, 9, 16, 19, 20}

S. Juneau ⁵⁹

R Kehoe ⁶⁰

Robert A. Kehoe ⁶¹

David Kirkby ^{40, 41}

T. Kisner ^{1, 2}

A. Kremin ^{1, 2}

A. Lambert ²

Adam Lambert ¹

Martin Landriau ^{1, 2}

Laurent Le Guillou ^{31, 33}

Marc Manera ^{10, 12, 62, 63}

Paul Martini ^{7, 9, 16, 17, 18, 20}

Aaron M. Meisner ^{59, 64}

R. Miquel ^{10, 12, 65, 66}

Paulo Montero-Camacho ^{67, 68}

John Moustakas ^{69, 70}

E. Mueller ^{71, 72}

A. D. Myers ^{73, 74}

Jundan Nie ^{75, 76}

G. Niz ^{14, 15, 77, 78}

N. Palanque‐Delabrouille ^{1, 2, 3, 4}

Will J. Percival ^{79, 80, 81, 82, 83}

C. Poppett ^{1, 2, 84, 85, 86, 87}

M. Rezaie ^{88, 89}

G. Rossi ⁹⁰

Graziano Rossi ⁹¹

E. Sánchez ^{92, 93}

D Schlegel ²

David J. Schlegel ¹

M. Schubnell ^{94, 95}

Hee‐Jong Seo ^{96, 97}

Joseph Harry Silber ^{1, 2}

D. Sprayberry ⁵⁹

Ting Tan ^{3, 4}

G. Tarle ^{94, 98}

Mariana Vargas-Magaña ^{21, 22}

Hu Zou ^{75, 76}

Скрыть аффилиации авторов Показать аффилиации авторов: 98 аффилиаций

LBL, Berkeley |

Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, U.S.A. |

IRFU, Saclay |

⁴

Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France |

⁵

Utah U. |

⁶

Department of Physics and Astronomy, The University of Utah, 115 South 1400 East, Salt Lake City, UT 84112, U.S.A. |

⁷

Chicago U., KICP |

⁸

NASA, Goddard |

⁹

Center for Cosmology and AstroParticle Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210, U.S.A. |

¹⁰

Barcelona, IFAE |

¹¹

University Coll. London

¹²

Institut de F'isica d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra Barcelona, Spain

Автономный университет Барселоны

Барселонский институт науки и технологий

Институт физики высоких энергий

¹³

Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, U.K. |

¹⁴

Guanajuato U.

¹⁵

Departamento de Física, Universidad de Guanajuato – DCI, C.P. 37150, Leon, Guanajuato, México |

¹⁶

Ohio State U. |

¹⁷

Ohio State U., Dept. Astron. |

¹⁸

Department of Astronomy, The Ohio State University, 4055 McPherson Laboratory, 140 W 18th Avenue, Columbus, OH 43210, U.S.A. |

¹⁹

Department of Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210, U.S.A. |

²⁰

The Ohio State University, Columbus, 43210 OH, U.S.A. |

²¹

Instituto de Física, Universidad Nacional Autónoma de México, Cd. de México C.P. 04510, México |

²²

UNAM, Mexico |

²³

Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France |

²⁴

Marseille, Lab. Astrophys.

²⁵

Barcelona, Polytechnic U.

²⁶

Departament de Física, EEBE, Universitat Politècnica de Catalunya, c/Eduard Maristany 10, 08930 Barcelona, Spain |

²⁷

LPC, Clermont-Ferrand |

²⁸

Marseille, CPPM

²⁹

Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France

Университет Экс-Марсель

Национальный институт ядерной физики и физики элементарных частиц

³⁰

Université Clermont-Auvergne, CNRS, LPCA, 63000 Clermont-Ferrand, France |

³¹

Sorbonne Université, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), FR-75005 Paris, France

Университет Сорбонна

Национальный институт ядерной физики и физики элементарных частиц

³²

IRFU, CEA, Universit'e Paris-Saclay, F-91191 Gif-sur-Yvette, France |

³³

LPNHE, Paris

³⁴

Munich U. |

³⁵

Munich, Tech. U., Universe |

³⁶

University Observatory, Faculty of Physics, Ludwig-Maximilians-Universität, Scheinerstr. 1, 81677 München, Germany |

³⁷

Excellence Cluster ORIGINS, Boltzmannstrasse 2, D-85748 Garching, Germany |

³⁸

Boston U.

³⁹

Physics Departament, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, U.S.A. |

⁴⁰

UC, Irvine |

⁴¹

Department of Physics and Astronomy, University of California, Irvine, 92697, U.S.A. |

⁴²

KIPAC, Menlo Park |

⁴³

SLAC National Accelerator Laboratory, Menlo Park, CA 94305, U.S.A. |

⁴⁴

Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Menlo Park, CA 94305, U.S.A.

Институт астрофизики элементарных частиц и космологии Кавли

Стэнфордский университет

⁴⁵

Andes U., Bogota |

⁴⁶

Observatorio Astronómico, Universidad de los Andes, Cra. 1 No. 18A-10, Edificio H, CP 111711 Bogotá, Colombia |

⁴⁷

Departamento de Física, Universidad de los Andes, Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá, Colombia |

⁴⁸

Institut d'Estudis Espacials de Catalunya (IEEC), 08034 Barcelona, Spain |

⁴⁹

Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX, U.K. |

⁵⁰

Institute of Space Sciences, ICE-CSIC, Campus UAB, Carrer de Can Magrans s/n, 08913 Bellaterra, Barcelona, Spain |

⁵¹

Barcelona, IEEC |

⁵²

Portsmouth U., ICG

⁵³

CONACYT, Mexico |

⁵⁴

Consejo Nacional de Ciencia y Tecnología, Av. Insurgentes Sur 1582, Colonia Crédito Constructor, Del. Benito Juárez C.P. 03940, México D.F., México |

⁵⁵

FermiLab

⁵⁶

Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, U.S.A. |

⁵⁷

Princeton U. |

⁵⁸

Department of Astrophysical Sciences, Princeton University, Princeton NJ 08544, U.S.A. |

⁵⁹

Natl. Solar Observ., Tucson |

⁶⁰

Department of Physics, Southern Methodist University, 3215 Daniel Avenue, Dallas, TX 75275, U.S.A. |

⁶¹

Southern Methodist U.

⁶²

Barcelona, Autonoma U.

⁶³

Departament de Física, Serra Húnter, Universitat Autònoma de Barcelona, 08193 Bellaterra (Barcelona), Spain |

⁶⁴

NSF NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, U.S.A. |

⁶⁵

ICREA, Barcelona |

⁶⁶

Institució Catalana de Recerca i Estudis Avançats, Passeig de Lluís Companys, 23, 08010 Barcelona, Spain |

⁶⁷

Tsinghua U., Beijing |

⁶⁸

Department of Astronomy, Tsinghua University, 30 Shuangqing Road, Haidian District, Beijing, China, 100190 |

⁶⁹

Siena Coll., Loudonville

⁷⁰

Department of Physics and Astronomy, Siena College, 515 Loudon Road, Loudonville, NY 12211, U.S.A. |

⁷¹

Sussex U.

⁷²

Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, U.K. |

⁷³

Wyoming U. |

⁷⁴

Department of Physics & Astronomy, University of Wyoming, 1000 E. University, Dept. 3905, Laramie, WY 82071, U.S.A. |

⁷⁵

Beijing Observ. |

⁷⁶

National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Rd., Chaoyang District, Beijing, 100012, P.R. China |

⁷⁷

Mexico U., ICN |

⁷⁸

Instituto Avanzado de Cosmología A. C., San Marcos 11 – Atenas 202, Magdalena Contreras, 10720, Ciudad de México, México |

⁷⁹

Perimeter Inst. Theor. Phys. |

⁸⁰

Waterloo U.

⁸¹

Department of Physics and Astronomy, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada |

⁸²

Perimeter Institute for Theoretical Physics, 31 Caroline St. North, Waterloo, ON N2L 2Y5, Canada |

⁸³

Waterloo Centre for Astrophysics, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada |

⁸⁴

UC, Berkeley (main) |

⁸⁵

UC, Berkeley, Math. Dept. |

⁸⁶

University of California, Berkeley, 110 Sproul Hall #5800 Berkeley, CA 94720, U.S.A. |

⁸⁷

Space Sciences Laboratory, University of California, Berkeley, 7 Gauss Way, Berkeley, CA 94720, U.S.A. |

⁸⁸

Kansas State U., Manhattan

⁸⁹

Department of Physics, Kansas State University, 116 Cardwell Hall, Manhattan, KS 66506, U.S.A. |

⁹⁰

Department of Physics and Astronomy, Sejong University, Seoul, 143-747, Korea |

⁹¹

Sejong U. |

⁹²

Madrid, CIEMAT |

⁹³

CIEMAT, Avenida Complutense 40, E-28040 Madrid, Spain |

⁹⁴

MICHIGAN U. |

⁹⁵

U. Michigan, Ann Arbor

⁹⁶

Ohio U., Athens

⁹⁷

Department of Physics & Astronomy, Ohio University, Athens, OH 45701, U.S.A. |

⁹⁸

University of Michigan, Ann Arbor, MI 48109, U.S.A. |

Тип публикации: Journal Article

Дата публикации: 2025-01-01

IOP Publishing

Journal of Cosmology and Astroparticle Physics

scimago Q2

wos Q1

БС1

SJR: 0.795

CiteScore: 9.1

Impact factor: 5.9

ISSN: 14757516, 14757508

DOI: 10.1088/1475-7516/2025/01/140

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Краткое описание

Baryon Acoustic Oscillations can be measured with sub-percent precision above redshift two with the Lyman-α (Lyα) forest auto-correlation and its cross-correlation with quasar positions. This is one of the key goals of the Dark Energy Spectroscopic Instrument (DESI) which started its main survey in May 2021. We present in this paper a study of the contaminants to the Lyα forest which are mainly caused by correlated signals introduced by the spectroscopic data processing pipeline as well as astrophysical contaminants due to foreground absorption in the intergalactic medium. Notably, an excess signal caused by the sky background subtraction noise is present in the Lyα auto-correlation in the first line-of-sight separation bin. We use synthetic data to isolate this contribution, we also characterize the effect of spectro-photometric calibration noise, and propose a simple model to account for both effects in the analysis of the Lyα forest. We then measure the auto-correlation of the quasar flux transmission fraction of low redshift quasars, where there is no Lyα forest absorption but only its contaminants. We demonstrate that we can interpret the data with a two-component model: data processing noise and triply ionized Silicon and Carbon auto-correlations. This result can be used to improve the modeling of the Lyα auto-correlation function measured with DESI.

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American Physical Society (APS)	American Physical Society (APS), 1, 33.33% American Physical Society (APS) 1 публикация, 33.33%
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Guy J. et al. Characterization of contaminants in the Lyman-alpha forest auto-correlation with DESI // Journal of Cosmology and Astroparticle Physics. 2025. Vol. 2025. No. 01. p. 140.

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Guy J. et al. Characterization of contaminants in the Lyman-alpha forest auto-correlation with DESI // Journal of Cosmology and Astroparticle Physics. 2025. Vol. 2025. No. 01. p. 140.

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@article{2025_Guy,

author = {Julien Guy and S. Gontcho A. Gontcho and E. Armengaud and Allyson Brodzeller and A. Cuceu and Andreu Font-Ribera and Hiram K. Herrera-Alcantar and N. G. Karaçaylı and A. Muñoz-Gutiérrez and Andrea Muñoz‐Gutiérrez and M. M. Pieri and M. Pieri and Ignasi Pérez-Ràfols and C. Ramírez-Pérez and César Ramírez-Pérez and C Ravoux and J. Rich and Jeffrey A. Rich and M. Walther and Marie Lynn Abdul Karim and J. Aguilar and S. Ahlen and A. Bault and D. Brooks and David H. Brooks and T. Claybaugh and Todd Claybaugh and Rodrigo de la Cruz and Axel de la Macorra and P. Doel and K. Fanning and Jaime E. Forero-Romero and E Gaztañaga and E. Gaztanaga and Alma X. Gonzalez-Morales and G. Gutierrez and ChangHoon Hahn and K. Honscheid and S. Juneau and R Kehoe and Robert A. Kehoe and David Kirkby and T. Kisner and A. Kremin and A. Lambert and Adam Lambert and Martin Landriau and Laurent Le Guillou and Marc Manera and Paul Martini and others},

title = {Characterization of contaminants in the Lyman-alpha forest auto-correlation with DESI},

journal = {Journal of Cosmology and Astroparticle Physics},

year = {2025},

volume = {2025},

publisher = {IOP Publishing},

month = {jan},

url = {https://iopscience.iop.org/article/10.1088/1475-7516/2025/01/140},

number = {01},

pages = {140},

doi = {10.1088/1475-7516/2025/01/140}

}

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Guy, Julien, et al. “Characterization of contaminants in the Lyman-alpha forest auto-correlation with DESI.” Journal of Cosmology and Astroparticle Physics, vol. 2025, no. 01, Jan. 2025, p. 140. https://iopscience.iop.org/article/10.1088/1475-7516/2025/01/140.