U.S. Department of Energy Office of Scientific and Technical Information
Photometric Objects Around Cosmic Webs (PAC) Delineated in a Spectroscopic Survey. III. Accurate Measurement of Galaxy Stellar Mass Function with the Aid of Cosmological Redshift Surveys
We present a novel method to accurately measure the galaxy stellar mass function (GSMF) based upon the Photometric objects Around Cosmic webs (PAC) method developed in our first paper (Paper I) of the series. The method allows us to measure the GSMF to a lower-mass end that is not accessible to the spectroscopic sample used in the PAC. Compared with Paper I, the current measurement of GSMF is direct and model independent. We measure the GSMFs in the redshift ranges of z$$^{3}_{s}$$ < 0.2, 0.2 < zs < 0.4, and 0.5 < zs < 0.7 down to stellar masses of M* = 108.2, 1010.6, and 1010.6 M⊙, using the data from the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys and the spectroscopic samples of Slogan Digital Sky Survey (i.e., Main, LOWZ, and CMASS samples). Our results show that there is no evolution of GSMF from zs = 0.6 to zs = 0.1 for M* > 1010.6 M⊙, and that there is a clear upturn at M* ≈ 109.5 M⊙ toward smaller galaxies in the local GMSF at zs = 0.1. We provide an accurate double Schechter fit to the local GSMF for the entire range of M* and a table of our measurements at the three redshifts, which can be used to test theories of galaxy formation. Our method can achieve an accurate measurement of GSMF to the stellar mass limit where the spectroscopic sample is already highly incomplete (e.g., ~ 10-3) for its target selection.
Xu, Kun, et al. "Photometric Objects Around Cosmic Webs (PAC) Delineated in a Spectroscopic Survey. III. Accurate Measurement of Galaxy Stellar Mass Function with the Aid of Cosmological Redshift Surveys." The Astrophysical Journal, vol. 939, no. 2, Nov. 2022. https://doi.org/10.3847/1538-4357/ac8f47
Xu, Kun, Jing, Y. P., & Gao, Hongyu (2022). Photometric Objects Around Cosmic Webs (PAC) Delineated in a Spectroscopic Survey. III. Accurate Measurement of Galaxy Stellar Mass Function with the Aid of Cosmological Redshift Surveys. The Astrophysical Journal, 939(2). https://doi.org/10.3847/1538-4357/ac8f47
Xu, Kun, Jing, Y. P., and Gao, Hongyu, "Photometric Objects Around Cosmic Webs (PAC) Delineated in a Spectroscopic Survey. III. Accurate Measurement of Galaxy Stellar Mass Function with the Aid of Cosmological Redshift Surveys," The Astrophysical Journal 939, no. 2 (2022), https://doi.org/10.3847/1538-4357/ac8f47
@article{osti_2425250,
author = {Xu, Kun and Jing, Y. P. and Gao, Hongyu},
title = {Photometric Objects Around Cosmic Webs (PAC) Delineated in a Spectroscopic Survey. III. Accurate Measurement of Galaxy Stellar Mass Function with the Aid of Cosmological Redshift Surveys},
annote = {We present a novel method to accurately measure the galaxy stellar mass function (GSMF) based upon the Photometric objects Around Cosmic webs (PAC) method developed in our first paper (Paper I) of the series. The method allows us to measure the GSMF to a lower-mass end that is not accessible to the spectroscopic sample used in the PAC. Compared with Paper I, the current measurement of GSMF is direct and model independent. We measure the GSMFs in the redshift ranges of z$^{3}_{s}$ s s 8.2, 1010.6, and 1010.6 M⊙, using the data from the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys and the spectroscopic samples of Slogan Digital Sky Survey (i.e., Main, LOWZ, and CMASS samples). Our results show that there is no evolution of GSMF from zs = 0.6 to zs = 0.1 for M* > 1010.6 M⊙, and that there is a clear upturn at M* ≈ 109.5 M⊙ toward smaller galaxies in the local GMSF at zs = 0.1. We provide an accurate double Schechter fit to the local GSMF for the entire range of M* and a table of our measurements at the three redshifts, which can be used to test theories of galaxy formation. Our method can achieve an accurate measurement of GSMF to the stellar mass limit where the spectroscopic sample is already highly incomplete (e.g., ~ 10-3) for its target selection.},
doi = {10.3847/1538-4357/ac8f47},
url = {https://www.osti.gov/biblio/2425250},
journal = {The Astrophysical Journal},
issn = {ISSN 0004-637X},
number = {2},
volume = {939},
place = {United States},
publisher = {IOP Publishing},
year = {2022},
month = {11}}