4.7 Article

A lightcone catalogue from the Millennium-XXL simulation

Journal

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 470, Issue 4, Pages 4646-4661

Publisher

OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx1432

Keywords

methods: analytical; galaxies: halo; dark energy; dark matter; large-scale structure of Universe

Funding

  1. Science and Technology Facilities Council [ST/M503472/1, ST/L00075X/1]
  2. NSF [AST-1208891, AST-1612085]
  3. NASA [NNX14AC89G]
  4. Royal Society
  5. European Research Council [DEGAS-259586]
  6. CWRU
  7. ERC [DEGAS-259586]
  8. STFC (UK)
  9. ARC (Australia)
  10. AAO
  11. BIS National E-infrastructure [ST/K00042X/1]
  12. STFC [ST/H008519/1, ST/K00087X/1]
  13. STFC DiRAC [ST/K003267/1]
  14. Durham University
  15. [AYA2015-66211-C2-2]
  16. Division Of Astronomical Sciences
  17. Direct For Mathematical & Physical Scien [1612085] Funding Source: National Science Foundation
  18. Science and Technology Facilities Council [ST/H008519/1, ST/P000541/1, ST/M503472/1, ST/I00162X/1, ST/P006299/1, ST/L00075X/1] Funding Source: researchfish
  19. UK Space Agency [ST/I002960/1] Funding Source: researchfish
  20. STFC [ST/P000541/1, ST/P006299/1, ST/M001679/1, ST/I00162X/1, ST/H008519/1, ST/L00075X/1, ST/M503472/1, ST/M007995/1] Funding Source: UKRI

Ask authors/readers for more resources

Future galaxy surveys require realistic mock catalogues to understand and quantify systematics in order to make precise cosmological measurements. We present a halo lightcone catalogue and halo occupation distribution (HOD) galaxy catalogue built using the Millennium-XXL simulation. The halo catalogue covers the full sky, extending to z = 2.2 with a mass resolution of similar to 10(11)h(-1) M-Theta We use this to build a galaxy catalogue, which has an r-band magnitude limit of r < 20.0, with a median redshift of z similar to 0.2 A Monte Carlo HOD method is used to assign galaxies to the halo lightcone catalogue, and we evolve the HODs to reproduce a target luminosity function; by construction, the luminosity function of galaxies in the mock is in agreement with the Sloan Digital Sky Survey (SDSS) at low redshifts and the Galaxy and Mass Assembly (GAMA) survey at high redshifts. A Monte Carlo method is used to assign a (0.1)(g-r) colour to each galaxy, and the colour distribution of galaxies at different redshifts agrees with measurements from GAMA. The clustering of galaxies in the mock for galaxies in different magnitude and redshift bins is in good agreement with measurements from SDSS and GAMA, and the colour-dependent clustering is in reasonable agreement. We show that the baryon acoustic oscillation can be measured in the mock catalogue, and the redshift-space distortions are in agreement with measurements from SDSS illustrating that this catalogue will be useful for upcoming surveys.

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