Evolution of star-forming galaxies from z = 0.7 to 1.2 with eBOSS emission-line galaxies

Hong Guo, Xiaohu Yang, Anand Raichoor, Zheng Zheng, Johan Comparat, V. Gonzalez-Perez, Jean Paul Kneib, Donald P. Schneider, Dmitry Bizyaev, Daniel Oravetz, Audrey Oravetz, Kaike Pan

Research output: Contribution to journalArticle

Abstract

We study the evolution of star-forming galaxies with 10 10 M < M < 10 11.6 M over the redshift range of 0.7 < z < 1.2 using the emission-line galaxies (ELGs) in the extended Baryon Oscillation Spectroscopic Survey (eBOSS). By applying the incomplete conditional stellar mass function (SMF) model proposed in Guo et al., we simultaneously constrain the sample completeness, the stellariVhalo mass relation (SHMR), and the quenched galaxy fraction. We obtain the intrinsic SMFs for star-forming galaxies in the redshift bins of 0.7 < z < 0.8, 0.8 < z < 0.9, 0.9 < z < 1.0, and 1.0 < z < 1.2, as well as the SMF for all galaxies in the redshift bin of 0.7 < z < 0.8. We find that the eBOSS ELG sample only selects about 1%-10% of the star-forming galaxy population at the different redshifts, with the lower redshift samples more complete. There is only weak evolution in the SHMR of the ELGs from z = 1.2 to z = 0.7, as well as the intrinsic galaxy SMFs. Our best-fitting models show that the central ELGs at these redshifts live in halos of mass M ∼ 10 12 M , while the satellite ELGs occupy slightly more massive halos of M ∼ 10 12.6 M . The average satellite fraction of the observed ELGs varies from 13% to 17%, with the galaxy bias increasing from 1.1 to 1.4 from z = 0.7 to 1.2.

Original languageEnglish (US)
Article number147
JournalAstrophysical Journal
Volume871
Issue number2
DOIs
StatePublished - Feb 1 2019

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baryons
oscillation
galaxies
stars
oscillations
stellar mass
halos
completeness

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Guo, H., Yang, X., Raichoor, A., Zheng, Z., Comparat, J., Gonzalez-Perez, V., ... Pan, K. (2019). Evolution of star-forming galaxies from z = 0.7 to 1.2 with eBOSS emission-line galaxies. Astrophysical Journal, 871(2), [147]. https://doi.org/10.3847/1538-4357/aaf9ad
Guo, Hong ; Yang, Xiaohu ; Raichoor, Anand ; Zheng, Zheng ; Comparat, Johan ; Gonzalez-Perez, V. ; Kneib, Jean Paul ; Schneider, Donald P. ; Bizyaev, Dmitry ; Oravetz, Daniel ; Oravetz, Audrey ; Pan, Kaike. / Evolution of star-forming galaxies from z = 0.7 to 1.2 with eBOSS emission-line galaxies. In: Astrophysical Journal. 2019 ; Vol. 871, No. 2.
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abstract = "We study the evolution of star-forming galaxies with 10 10 M ⊙ < M ∗ < 10 11.6 M ⊙ over the redshift range of 0.7 < z < 1.2 using the emission-line galaxies (ELGs) in the extended Baryon Oscillation Spectroscopic Survey (eBOSS). By applying the incomplete conditional stellar mass function (SMF) model proposed in Guo et al., we simultaneously constrain the sample completeness, the stellariVhalo mass relation (SHMR), and the quenched galaxy fraction. We obtain the intrinsic SMFs for star-forming galaxies in the redshift bins of 0.7 < z < 0.8, 0.8 < z < 0.9, 0.9 < z < 1.0, and 1.0 < z < 1.2, as well as the SMF for all galaxies in the redshift bin of 0.7 < z < 0.8. We find that the eBOSS ELG sample only selects about 1{\%}-10{\%} of the star-forming galaxy population at the different redshifts, with the lower redshift samples more complete. There is only weak evolution in the SHMR of the ELGs from z = 1.2 to z = 0.7, as well as the intrinsic galaxy SMFs. Our best-fitting models show that the central ELGs at these redshifts live in halos of mass M ∼ 10 12 M ⊙ , while the satellite ELGs occupy slightly more massive halos of M ∼ 10 12.6 M ⊙ . The average satellite fraction of the observed ELGs varies from 13{\%} to 17{\%}, with the galaxy bias increasing from 1.1 to 1.4 from z = 0.7 to 1.2.",
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Guo, H, Yang, X, Raichoor, A, Zheng, Z, Comparat, J, Gonzalez-Perez, V, Kneib, JP, Schneider, DP, Bizyaev, D, Oravetz, D, Oravetz, A & Pan, K 2019, 'Evolution of star-forming galaxies from z = 0.7 to 1.2 with eBOSS emission-line galaxies', Astrophysical Journal, vol. 871, no. 2, 147. https://doi.org/10.3847/1538-4357/aaf9ad

Evolution of star-forming galaxies from z = 0.7 to 1.2 with eBOSS emission-line galaxies. / Guo, Hong; Yang, Xiaohu; Raichoor, Anand; Zheng, Zheng; Comparat, Johan; Gonzalez-Perez, V.; Kneib, Jean Paul; Schneider, Donald P.; Bizyaev, Dmitry; Oravetz, Daniel; Oravetz, Audrey; Pan, Kaike.

In: Astrophysical Journal, Vol. 871, No. 2, 147, 01.02.2019.

Research output: Contribution to journalArticle

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AU - Guo, Hong

AU - Yang, Xiaohu

AU - Raichoor, Anand

AU - Zheng, Zheng

AU - Comparat, Johan

AU - Gonzalez-Perez, V.

AU - Kneib, Jean Paul

AU - Schneider, Donald P.

AU - Bizyaev, Dmitry

AU - Oravetz, Daniel

AU - Oravetz, Audrey

AU - Pan, Kaike

PY - 2019/2/1

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N2 - We study the evolution of star-forming galaxies with 10 10 M ⊙ < M ∗ < 10 11.6 M ⊙ over the redshift range of 0.7 < z < 1.2 using the emission-line galaxies (ELGs) in the extended Baryon Oscillation Spectroscopic Survey (eBOSS). By applying the incomplete conditional stellar mass function (SMF) model proposed in Guo et al., we simultaneously constrain the sample completeness, the stellariVhalo mass relation (SHMR), and the quenched galaxy fraction. We obtain the intrinsic SMFs for star-forming galaxies in the redshift bins of 0.7 < z < 0.8, 0.8 < z < 0.9, 0.9 < z < 1.0, and 1.0 < z < 1.2, as well as the SMF for all galaxies in the redshift bin of 0.7 < z < 0.8. We find that the eBOSS ELG sample only selects about 1%-10% of the star-forming galaxy population at the different redshifts, with the lower redshift samples more complete. There is only weak evolution in the SHMR of the ELGs from z = 1.2 to z = 0.7, as well as the intrinsic galaxy SMFs. Our best-fitting models show that the central ELGs at these redshifts live in halos of mass M ∼ 10 12 M ⊙ , while the satellite ELGs occupy slightly more massive halos of M ∼ 10 12.6 M ⊙ . The average satellite fraction of the observed ELGs varies from 13% to 17%, with the galaxy bias increasing from 1.1 to 1.4 from z = 0.7 to 1.2.

AB - We study the evolution of star-forming galaxies with 10 10 M ⊙ < M ∗ < 10 11.6 M ⊙ over the redshift range of 0.7 < z < 1.2 using the emission-line galaxies (ELGs) in the extended Baryon Oscillation Spectroscopic Survey (eBOSS). By applying the incomplete conditional stellar mass function (SMF) model proposed in Guo et al., we simultaneously constrain the sample completeness, the stellariVhalo mass relation (SHMR), and the quenched galaxy fraction. We obtain the intrinsic SMFs for star-forming galaxies in the redshift bins of 0.7 < z < 0.8, 0.8 < z < 0.9, 0.9 < z < 1.0, and 1.0 < z < 1.2, as well as the SMF for all galaxies in the redshift bin of 0.7 < z < 0.8. We find that the eBOSS ELG sample only selects about 1%-10% of the star-forming galaxy population at the different redshifts, with the lower redshift samples more complete. There is only weak evolution in the SHMR of the ELGs from z = 1.2 to z = 0.7, as well as the intrinsic galaxy SMFs. Our best-fitting models show that the central ELGs at these redshifts live in halos of mass M ∼ 10 12 M ⊙ , while the satellite ELGs occupy slightly more massive halos of M ∼ 10 12.6 M ⊙ . The average satellite fraction of the observed ELGs varies from 13% to 17%, with the galaxy bias increasing from 1.1 to 1.4 from z = 0.7 to 1.2.

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Guo H, Yang X, Raichoor A, Zheng Z, Comparat J, Gonzalez-Perez V et al. Evolution of star-forming galaxies from z = 0.7 to 1.2 with eBOSS emission-line galaxies. Astrophysical Journal. 2019 Feb 1;871(2). 147. https://doi.org/10.3847/1538-4357/aaf9ad