The chemical evolution of elliptical galaxies with stellar and QSO dust production

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Table 2

Dust parameters in the old and the new formulation.

Parameter	Calura et al.	New value	Element
	1	1	C^a

(C/O > 1)	0	0	O, Mg, Si, S, Ca, Ti, Fe
	0	0	C
(C/O < 1)	1	1	Mg, Si, S, Ca, Ti, Fe
	0.5	0.05	C
	0.8	0.08	Mg, Si, S, Ca, Ti, Fe^b
	0.5	0.05	C
	0.8	0.08	Mg, Si, S, Ca, Ti, Fe
τ₀	const with gal. mass	dependent on gal. mass
τ_destr	true SNII rate	effective^c SNII rate
	+true SNIa rate	+true SNIa rate
QSO dust	–	Elvis et al. (2002)

Notes.

^(a)

Refer to Sect. 3.1 for the formula for the C dust.

^(b)

Refer to Sect. 3.1 for the formula for the O dust.

^(c)

A factor of 10 lower than the true rate.

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