The dynamical and chemical evolution of dwarf spheroidal galaxies with GEAR

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Table 3

List of model parameters.

Context	Quantity	Symbol	Reference values	Variation

initial conditions	baryonic fraction	f_b	0.15	no
	dark halo core radius	r_c	1 kpc	no
	virial fraction	f_vir	0.5	no
	total mass	M_tot	-	[1−9 × 10⁸ M_⊙]
	gas central density	ρ_c,tot	-	[0.005–0.063 m_H/cm³]
	initial outer radius	r_max	-	[1.91–24.4 kpc]

gravity	softening	ϵ_g	50 pc	[adaptive]

sph	number of neighbors	N_ngb	50	[50, 100]

cooling	cooling function	Λ	Sutherland & Dopita (1993); Maio et al. (2007)	no

star formation	parameter	c_⋆	0.05	[0.01–1]
	critical density	ρ_sfr	0.1 m_H/cm³	[0.05–100 m_H/cm³]
	maximal number of stellar
	particles per gas particle	N_⋆	4	[1–15]
	gas temperature	T_⋆	3 × 10⁴ K	no

stellar evolution	initial mass function	IMF	Kroupa (2001)	[Kroupa, Salpeter]
	yields	-	Iwamoto et al. (1999); Tsujimoto et al. (1995)	no

thermal feedback	supernova energy	E_SN	10⁵¹ erg	no
	efficiency	ϵ_SN	0.03	[0.01–1]
	adiabatic period	t_ad	5 Myr	[2–30 Myr]

Notes. The reference values indicate our final set of adopted parameters based on the four generic models of Local Group dSphs. The last column indicates whether or not the parameters were varied (see Sects. 5 and 6), in which case we give their range of values.

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