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Measuring the Conditional Luminosity and Stellar Mass Functions of Galaxies by Combining the Dark Energy Spectroscopic Instrument Legacy Imaging Surveys Data Release 9, Survey Validation 3, and Year 1 Data

Journal Article · · The Astrophysical Journal
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  1. Shanghai Jiao Tong Univ. (China)
  2. Shanghai Jiao Tong Univ. (China); Chinese Academy of Sciences (CAS), Shanghai (China)
  3. Shanghai Jiao Tong Univ. (China); Sun Yat-Sen Univ. (China)
  4. Chinese Academy of Sciences (CAS), Beijing (China)
  5. Stanford Univ., CA (United States). Kavli Institute for Particle Astrophysics & Cosmology; Univ. of California, Santa Cruz, CA (United States); Univ. of Michigan, Ann Arbor, MI (United States)
  6. Princeton Univ., NJ (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  7. Univ. of Arizona, Tucson, AZ (United States)
  8. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  9. Boston Univ., MA (United States)
  10. Univ. College London (United Kingdom)
  11. Durham Univ. (United Kingdom)
  12. Univ. Nacional Autonoma de Mexico (UNAM), Mexico City (Mexico)
  13. Univ. of Pittsburgh, PA (United States)
  14. University of the Andes (Colombia)
  15. The Ohio State Univ., Columbus, OH (United States)
  16. Southern Methodist Univ., Dallas, TX (United States)
  17. Inst. for High Energy Physics (IFAE), Barcelona (Spain); Univ. Autonoma de Barcelona (Spain)
  18. National Optical-Infrared Astronomy Research Laboratory (NOIRLab), Tucson, AZ (United States)
  19. Univ. Autonoma de Barcelona (Spain). Inst. Catalana de Recerca i Estudis Avancats (ICREA) and Inst. de Fisica d'Altes Energies (IFAE)
  20. Siena College, Loudonville, NY (United States)
  21. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of California, Berkeley, CA (United States)
  22. Kansas State Univ., Manhattan, KS (United States)
  23. Sejong Univ., Seoul (Korea, Republic of)
  24. Research Centre for Energy, Environment and Technology (CIEMAT), Madrid (Spain)
  25. Univ. of Michigan, Ann Arbor, MI (United States)
+ Show Author Affiliations
In this investigation, we leverage the combination of the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys Data Release 9, Survey Validation 3, and Year 1 data sets to estimate the conditional luminosity functions and conditional stellar mass functions (CLFs and CSMFs) of galaxies across various halo mass bins and redshift ranges. To support our analysis, we utilize a realistic DESI mock galaxy redshift survey (MGRS) generated from a high-resolution Jiutian simulation. An extended halo-based group finder is applied to both MGRS catalogs and DESI observation. By comparing the r- and z-band luminosity functions (LFs) and stellar mass functions (SMFs) derived using both photometric and spectroscopic data, we quantified the impact of photometric redshift (photo-z) errors on the galaxy LFs and SMFs, especially in the low-redshift bin at the low-luminosity/mass end. By conducting prior evaluations of the group finder using MGRS, we successfully obtain a set of CLF and CSMF measurements from observational data. We find that at low redshift, the faint-end slopes of CLFs and CSMFs below ~109h–2L⊙ (or h–2M⊙) evince a compelling concordance with the subhalo mass functions. After correcting the cosmic variance effect of our local Universe following Chen et al., the faint-end slopes of the LFs/SMFs turn out to also be in good agreement with the slope of the halo mass function.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-05CH11231; SC0019193
Other Award/Contract Number:
11833005
11890692
11621303
12141302
OSTI ID:
3007448
Alternate ID(s):
OSTI ID: 2440671
Journal Information:
The Astrophysical Journal, Journal Name: The Astrophysical Journal Journal Issue: 1 Vol. 971; ISSN 0004-637X; ISSN 1538-4357
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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79 ASTRONOMY AND ASTROPHYSICS
dark matter
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galaxy groups
large-scale structure of the universe