Galaxy And Mass Assembly (GAMA): Deconstructing the galaxy stellar mass function by star formation and environment

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Volume 706 (February 2026)

A&A, 706 (2026) A202

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Table 3.

Best-fit double Schechter function parameters of the GSMFs of grouped galaxies for different subsamples, as indicated.

All grouped galaxy sample	log M^★	α₁	α₂
	( $M_{⊙} h_{70}^{- 2}$ $M_{\odot}\,h_{70}^{-2}$ )
$log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 12.65$ $\log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 12.65$	10.61 ± 0.02	0.07 ± 0.12	−1.32 ± 0.05
$12.65 < log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 13.3$ $12.65 < \log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 13.3$	10.71 ± 0.02	−0.14 ± 0.11	−1.38 ± 0.06
$13.3 < log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 13.85$ $13.3 < \log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 13.85$	10.82 ± 0.03	−0.06 ± 0.16	−1.24 ± 0.06
$log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) > 13.85$ $\log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) > 13.85$	11.00 ± 0.06	0.95 ± 0.23	−0.99 ± 0.03

Grouped passive galaxy sample	log M^★	α₁	α₂
	( $M_{⊙} h_{70}^{- 2}$ $M_{\odot}\,h_{70}^{-2}$ )

$log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 12.65$ $\log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 12.65$	10.63 ± 0.03	0.23 ± 0.21	−1.15 ± 0.49
$12.65 < log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 13.3$ $12.65 < \log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 13.3$	10.73 ± 0.02	−0.02 ± 0.07	−1.95 ± 0.29
$13.3 < log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 13.85$ $13.3 < \log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 13.85$	10.86 ± 0.03	−0.15 ± 0.17	−1.48 ± 0.31
$log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) > 13.85$ $\log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) > 13.85$	10.95 ± 0.06	1.17 ± 0.29	−0.88 ± 0.05

Grouped star-forming galaxy sample	log M^★	α₁	α₂
	( $M_{⊙} h_{70}^{- 2}$ $M_{\odot}\,h_{70}^{-2}$ )

$log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 12.65$ $\log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 12.65$	10.41 ± 0.04	0.28 ± 0.20	−1.30 ± 0.04
$12.65 < log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 13.3$ $12.65 < \log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 13.3$	10.51 ± 0.04	0.07 ± 0.23	−1.34 ± 0.06
$13.3 < log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 13.85$ $13.3 < \log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 13.85$	10.64 ± 0.06	−0.15 ± 0.29	−1.38 ± 0.05
$log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) > 13.85$ $\log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) > 13.85$	10.49 ± 0.05	0.82 ± 0.27	−1.19 ± 0.06

Central galaxy sample	log M^★	α₁	α₂
	( $M_{⊙} h_{70}^{- 2}$ $M_{\odot}\,h_{70}^{-2}$ )

$log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 12.65$ $\log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 12.65$	10.55 ± 0.03	0.83 ± 0.17	−0.95 ± 0.06
$12.65 < log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 13.3$ $12.65 < \log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 13.3$	10.67 ± 0.02	0.56 ± 0.13	−1.03 ± 0.13
$13.3 < log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 13.85$ $13.3 < \log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 13.85$	10.75 ± 0.03	0.67 ± 0.17	−1.04 ± 0.15
$log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) > 13.85$ $\log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) > 13.85$	10.99 ± 0.04	0.71 ± 0.21	−1.14 ± 0.24

Satellite galaxy sample	log M^★	α₁	α₂
	( $M_{⊙} h_{70}^{- 2}$ $M_{\odot}\,h_{70}^{-2}$ )

$log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 12.65$ $\log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 12.65$	10.36 ± 0.04	−0.11 ± 0.25	−1.57 ± 0.08
$12.65 < log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 13.3$ $12.65 < \log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 13.3$	10.43 ± 0.04	0.04 ± 0.23	−1.45 ± 0.08
$13.3 < log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) \leq 13.85$ $13.3 < \log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) \leq 13.85$	10.54 ± 0.04	0.10 ± 0.25	−1.22 ± 0.08
$log (\frac{M_{dyn}}{M_{⊙} h_{70}^{- 1}}) > 13.85$ $\log (\frac{M_{\mathrm{dyn}}}{M_{\odot}\,h^{-1}_{70}}) > 13.85$	10.83 ± 0.06	−0.25 ± 0.28	−1.04 ± 0.07

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