A negative stellar mass−gaseous metallicity gradient relation of dwarf galaxies modulated by stellar feedback

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Table 1.

Linear fit and Spearman’s rank correlation test for the relationship between the metallicity gradient and other properties.

Property	Unit	Slope	Intercept	r	p-value
log M_⋆	dex kpc⁻¹	−0.081 ± 0.016	0.679 ± 0.142	−0.47 ± 0.089	0.00025
log M_⋆	dex $R_{e}^{- 1}$ $R_{\mathrm{e}}^{-1}$	−0.091 ± 0.017	0.743 ± 0.149	−0.56 ± 0.081	0.000093
log M_baryon	dex kpc⁻¹	−0.081 ± 0.018	0.705 ± 0.158	−0.49 ± 0.091	0.00013
log M_baryon	dex $R_{e}^{- 1}$ $R_{\mathrm{e}}^{-1}$	−0.089 ± 0.017	0.855 ± 0.159	−0.58 ± 0.073	0.0000032
∇_rlog SFR	dex $R_{e}^{- 1}$ $R_{\mathrm{e}}^{-1}$	−0.016 ± 0.009	−0.036 ± 0.016	−0.13 ± 0.12	0.36
∇_rlog sSFR	dex $R_{e}^{- 1}$ $R_{\mathrm{e}}^{-1}$	−0.011 ± 0.018	−0.024 ± 0.011	−0.11 ± 0.13	0.43
log y_eff	dex $R_{e}^{- 1}$ $R_{\mathrm{e}}^{-1}$	−0.13 ± 0.034	−0.36 ± 0.091	−0.37 ± 0.10	0.0061
Φ	dex $R_{e}^{- 1}$ $R_{\mathrm{e}}^{-1}$	−0.09 ± 0.019	0.8 ± 0.164	−0.46 ± 0.095	0.00038
∇_rlogΣ_⋆	dex $R_{e}^{- 1}$ $R_{\mathrm{e}}^{-1}$	0.062 ± 0.035	0.026 ± 0.032	0.13 ± 0.14	0.33
η_k	dex $R_{e}^{- 1}$ $R_{\mathrm{e}}^{-1}$	0.005 ± 0.008	−0.03 ± 0.017	−0.10 ± 0.14	0.47

Notes. Col(1)–(2): Galaxy properties and units. Col(3)–(4): The slope and intercept of linear fit between the metallicity gradient and other properties with errors estimated through bootstrap random sampling. Col(5)–(6): The Spearman’s rank correlation coefficient r and p-values. A p-value below 0.05 indicates the correlation coefficient is statistically significant.

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