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Modelling the impact of quasar redshift errors on the full-shape analysis of correlations in the Lyman-α forest.

Journal Article · · Monthly Notices of the Royal Astronomical Society
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [10];  [11];  [7];  [12];  [13];  [8];  [14];  [8];  [15];  [16];  [17] more »;  [18];  [8];  [8];  [8];  [19];  [8];  [20];  [21];  [22];  [23];  [24];  [25];  [26];  [27];  [28];  [29];  [30];  [31];  [8];  [32];  [33];  [8];  [34];  [35];  [34];  [8];  [36] « less
  1. The Barcelona Institute of Science and Technology, Bellaterra (Barcelona) (Spain); DESI. et al.
  2. Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 ,; Institut d’Astrophysique de Paris . 98 bis boulevard Arago. 75014 Paris ,
  3. Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Edifici Cn, Campus UAB, 08193, Bellaterra (Barcelona) ,
  4. Institut d’Astrophysique de Paris . 98 bis boulevard Arago. 75014 Paris ,; IRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette ,
  5. Boston University Department of Physics, , 590 Commonwealth Avenue, Boston, MA 02215  
  6. Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano , Via Celoria 16, I-20133 Milano ,; INAF-Osservatorio Astronomico di Brera , Via Brera 28, 20122 Milano ,
  7. University College London Department of Physics & Astronomy, , Gower Street, London, WC1E 6BT ,
  8. Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 ,
  9. Durham University Institute for Computational Cosmology, Department of Physics, , South Road, Durham DH1 3LE ,
  10. Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica , Ciudad Universitaria, Cd. de México C. P. 04510 ,
  11. University of Toronto Department of Astronomy & Astrophysics, , Toronto, ON M5S 3H4 ,; Astrophysics, and Cosmology Center (PITT PACC), University of Pittsburgh Department of Physics & Astronomy and Pittsburgh Particle Physics, , 3941 O’Hara Street, Pittsburgh, PA 15260 ,
  12. Universidad de los Andes Departamento de Física, , Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá ,; Observatorio Astronómico, Universidad de los Andes , Cra. 1 No. 18A-10, Edificio H, CP 111711 Bogotá ,
  13. Institut d’Estudis Espacials de Catalunya (IEEC) , c/ Esteve Terradas 1, Edifici RDIT, Campus PMT-UPC, 08860 Castelldefels ,; Institute of Cosmology and Gravitation, University of Portsmouth , Dennis Sciama Building, Portsmouth, PO1 3FX ,; Institute of Space Sciences, ICE-CSIC , Campus UAB, Carrer de Can Magrans s/n, 08913 Bellaterra, Barcelona ,
  14. Fermi National Accelerator Laboratory , PO Box 500, Batavia, IL 60510 ,
  15. Center for Cosmology and AstroParticle Physics , The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210 ,; The Ohio State University Department of Physics, , 191 West Woodruff Avenue, Columbus, OH 43210 ,; The Ohio State University , Columbus, 43210 OH ,
  16. The University of Texas at Dallas Department of Physics, , 800 W. Campbell Rd., Richardson, TX 75080 ,
  17. Southern Methodist University Department of Physics, , 3215 Daniel Avenue, Dallas, TX 75275 ,
  18. University of California Department of Physics and Astronomy, , Irvine, 92697 ,
  19. Sorbonne Université, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE) , FR-75005 Paris ,
  20. Serra Húnter, Universitat Autònoma de Barcelona Departament de Física, , 08193 Bellaterra (Barcelona) ,; Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Edifici Cn, Campus UAB, 08193, Bellaterra (Barcelona) ,
  21. Center for Cosmology and AstroParticle Physics , The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210 ,; The Ohio State University Department of Astronomy, , 4055 McPherson Laboratory, 140 W 18th Avenue, Columbus, OH 43210 ,; The Ohio State University , Columbus, 43210 OH ,
  22. Institució Catalana de Recerca i Estudis Avançats , Passeig de Lluís Companys, 23, 08010 Barcelona ,; Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Edifici Cn, Campus UAB, 08193, Bellaterra (Barcelona) ,
  23. Siena College Department of Physics and Astronomy, , 515 Loudon Road, Loudonville, NY 12211 ,
  24. Institute of Cosmology and Gravitation, University of Portsmouth , Dennis Sciama Building, Portsmouth, PO1 3FX ,
  25. DCI-Campus León Departamento de Física, , Universidad de Guanajuato, Loma del Bosque 103, León, Guanajuato C. P. 37150 ,; Instituto Avanzado de Cosmología A. C. , San Marcos 11 - Atenas 202. Magdalena Contreras. Ciudad de México C. P. 10720 ,
  26. IRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette ,; Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 ,
  27. University of Waterloo Department of Physics and Astronomy, , 200 University Ave W, Waterloo, ON N2L 3G1 ,; Perimeter Institute for Theoretical Physics , 31 Caroline St. North, Waterloo, ON N2L 2Y5 ,; Waterloo Centre for Astrophysics, University of Waterloo , 200 University Ave W, Waterloo, ON N2L 3G1 ,
  28. Instituto de Astrofísica de Andalucía (CSIC) , Glorieta de la Astronomía, s/n, E-18008 Granada ,
  29. EEBE, Universitat Politècnica de Catalunya Departament de Física, , c/Eduard Maristany 10, 08930 Barcelona ,
  30. Sejong University Department of Physics and Astronomy, , 209 Neungdong-ro, Gwangjin-gu, Seoul 05006 ,
  31. CIEMAT , Avenida Complutense 40, E-28040 Madrid ,
  32. University of Michigan Department of Physics, , 450 Church Street, Ann Arbor, MI 48109 ,; University of Michigan , 500 S. State Street, Ann Arbor, MI 48109 ,
  33. Ohio University, 139 University Terrace Department of Physics & Astronomy, , Athens, OH 45701 ,
  34. NSF NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719 ,
  35. University of Michigan , 500 S. State Street, Ann Arbor, MI 48109 ,
  36. National Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Road, Chaoyang District, Beijing, 100101 ,
+ Show Author Affiliations
In preparation for the first cosmological measurements from the full shape of the Lyman-α (Lyα) forest from DESI, we must carefully model all relevant systematics that might bias our analysis. It was shown in Youles et al. (2022) that random quasar redshift errors produce a smoothing effect on the mean quasar continuum in the Lyα forest region. This, in turn, gives rise to spurious features in the Lyα autocorrelation and its cross-correlation with quasars. Using synthetic data sets based on the DESI survey, we confirm that the impact on BAO measurements is small, but that a bias is introduced to parameters which depend on the full shape of our correlations. We combine a model of this contamination in the cross-correlation (Youles et al. 2022) with a new model we introduce here for the auto-correlation. These are parametrised by 3 parameters, which, when included in a joint fit to both correlation functions, successfully eliminate any impact of redshift errors on our full-shape constraints. We also present a strategy for removing this contamination from real data, by removing ∼0.3% of correlating pairs.
Research Organization:
Andes U., Bogota; Barcelona, Autonoma U.; Barcelona, IEEC; Barcelona, IFAE; Barcelona, Polytechnic U.; Boston U.; Brera Observ.; Chicago U., KICP; Durham U., ICC; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Granada U., Theor. Phys. Astrophys.; Guanajuato U.; Hiroshima Shudo U.; ICE, Bellaterra; ICREA, Barcelona; IRFU, Saclay; KEK, Tsukuba; LBNL, Berkeley; LPNHE, Paris; Madrid, CIEMAT; Mexico U., ICN; Michigan U.; Michigan U., MCTP; Milan U.; Natl. Solar Observ., Tucson; Ohio State U.; Ohio State U., Dept. Astron.; Ohio U., Athens; Paris, Inst. Astrophys.; Perimeter Inst. Theor. Phys.; Pittsburgh U.; Portsmouth U., ICG; Sejong U.; Siena Coll., Loudonville; Southern Methodist U.; Syracuse U.; Toronto U., Astron. Dept.; U. Texas, Dallas; UC, Irvine; UNAM, Mexico; Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy; University Coll. London; University of Michigan, Ann Arbor, MI (United States); Waterloo U.
Sponsoring Organization:
NASA Hubble Fellowship; Spanish Ministry of Science and Innovation (MICINN); U.S. National Science Foundation (NSF), Division of Astronomical Sciences; US Department of Energy; USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
89243024CSC000002; AC02-05CH11231; SC0009920; SC0019193
OSTI ID:
3006975
Alternate ID(s):
OSTI ID: 3010807
OSTI ID: 2568592
Report Number(s):
FERMILAB-PUB-25-0348-PPD
Journal Information:
Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 2 Vol. 545; ISSN 1365-2966; ISSN 0035-8711
Publisher:
Oxford University Press (OUP)Copyright Statement
Country of Publication:
United States
Language:
English

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