The Herschel Virgo Cluster Survey - IX. Dust-to-gas mass ratio and metallicity gradients in four Virgo spiral galaxies

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Table 1

Parameters of the sample galaxies.

Name	Inclination	Position angle	D_opt^a	Slope_KK04	12 + log (O/H)_KK04	Ref.
			(arcmin)	(dex/R₂₅)	at R_G = 0.7 R₂₅	(7)
(1)	(2)	(3)	(4)	(5)	(6)

NGC 4254	42° (53°)^b [42°]^d	67° (61.6°)^b [68°]^d	5.6	–0.42 ± 0.06	8.84 ± 0.02	M10^c
NGC 4303	30°^e	135°^e	6.5	–0.42 ± 0.02^‡	9.24 ± 0.02	S96^c
NGC 4321	33° [26°]^f	154.4°[155°]^f	7.6	–0.35 ± 0.13	9.04 ± 0.04	M10^c
NGC 4501	63°[58°]^g	141.4°[140°]^g	7.1	–0.07 ± 0.16^‡	9.30 ± 0.21	S96^c

Notes.

^(a)

D_opt is 2 × R₂₅;

^(b)

average values for R_G < R₂₅ and, between brackets, throughout the whole radial range;

^(c)

M10 = Moustakas et al. (2010) and S96 = Skillman et al. (1996);

^(d)

Phookun et al. (1993);

^(e)

Koda & Sofue (2006);

^(f)

Canzian & Allen (1997);

^(g)

Kenney & Young (1988).

^(‡)

We recomputed the gradient slope of NGC 4303 and NGC 4501 using data from Skillman et al. (1996), converting them with Kewley & Ellison (2008) formula to the KK04 scale, obtaining different values with respect to those quoted in their paper.

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