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CMB lensing and Lyα forest cross bispectrum from DESI’s first-year quasar sample

Journal Article · · Phys.Rev.D
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  1. Chicago U., KICP; Ohio State U., Dept. Astron.; Ohio State U.
  2. Chicago U., KICP; Ohio State U., Dept. Astron.
  3. Ohio State U., Dept. Astron.
  4. LBL, Berkeley; UC, Berkeley, Astron. Dept.
  5. LBL, Berkeley
  6. Boston U.
  7. IRFU, Saclay
  8. University Coll. London
  9. UNAM, Mexico
  10. Pittsburgh U.
  11. KIPAC, Menlo Park; SLAC
  12. Andes U., Bogota
  13. Conacyt, Mexico; Guanajuato U.
  14. Fermilab
  15. Chicago U., KICP; Ohio State U.
  16. UC, Irvine
  17. LPNHE, Paris
  18. Barcelona, IFAE; Barcelona, Autonoma U.
  19. Natl. Solar Observ., Tucson
  20. ICREA, Barcelona; Barcelona, IFAE
  21. Sussex U.
  22. Wyoming U.
  23. Beijing Observ.
  24. Guanajuato U.; Mexico U., ICN
  25. IRFU, Saclay; LBL, Berkeley
  26. Waterloo U.; Perimeter Inst. Theor. Phys.
  27. LBL, Berkeley; UC, Berkeley (main)
  28. Granada U., Theor. Phys. Astrophys.
  29. Marseille, CPPM; IRFU, Saclay; LPC, Clermont-Ferrand
  30. Kansas State U.
  31. Sejong U.
  32. Madrid, CIEMAT
  33. Baltimore, Space Telescope Sci.
  34. Ohio U., Athens
  35. U. Michigan, Ann Arbor
+ Show Author Affiliations
The squeezed cross-bispectrum Bκ,Lyα between the gravitational lensing in the cosmic microwave background and the 1D Lyα forest power spectrum can constrain bias parameters and break degeneracies between σ8 and other cosmological parameters. We detect Bκ,Lyα with 4.8σ significance at an effective redshift zeff=2.4 using Planck PR3 lensing map and over 280,000 quasar spectra from the Dark Energy Spectroscopic Instrument’s first-year data. We test our measurement against metal contamination and foregrounds such as Galactic extinction and clusters of galaxies by deprojecting the thermal Sunyaev-Zeldovich effect. We compare our results to a tree-level perturbation theory calculation and find reasonable agreement between the model and measurement.
Research Organization:
Barcelona, IFAE; Baltimore, Space Telescope Sci.; Barcelona, Autonoma U.; Ohio State U., Dept. Astron.; ICREA, Barcelona; UC, Irvine; Mexico U., ICN; Madrid, CIEMAT; IRFU, Saclay; LPNHE, Paris; Andes U., Bogota; Boston U.; Ohio U., Athens; Pittsburgh U.; Perimeter Inst. Theor. Phys.; Granada U., Theor. Phys. Astrophys.; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Natl. Solar Observ., Tucson; Beijing Observ.; Guanajuato U.; Kansas State U.; Waterloo U.; U. Michigan, Ann Arbor; UNAM, Mexico; Marseille, CPPM; University Coll. London; LPC, Clermont-Ferrand; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); UC, Berkeley (main); Sejong U.; Conacyt, Mexico; SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); UC, Berkeley, Astron. Dept.; Chicago U., KICP; Ohio State U.; Wyoming U.; Sussex U.
Sponsoring Organization:
US Department of Energy
DOE Contract Number:
AC02-07CH11359; 89243024CSC000002
OSTI ID:
2467538
Report Number(s):
FERMILAB-PUB-24-0645-PPD; oai:inspirehep.net:2790008; arXiv:2405.14988
Journal Information:
Phys.Rev.D, Journal Name: Phys.Rev.D Journal Issue: 6 Vol. 110
Country of Publication:
United States
Language:
English

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