Herschel observations of Hickson compact groups of galaxies: Unveiling the properties of cold dust

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Volume 565 (May 2014)

A&A, 565 (2014) A25

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Table 6

Groups with cold intragroup dust.

Group	Dynamical	f_60,IRAS^a	f _60,pred. ^b	Fraction of intragroup	f _100,IRAS ^a	f _100,pred. ^b	Fraction of intragroup	M _{dust,galaxies}	M _D,IGM ^c
ID	state	(Jy)	(Jy)	emission at 60 μm^b	(Jy)	(Jy)	emission at 100 μm^b	×10⁶ (M_⊙)	×10⁶ (M_⊙)

HCG16	DY	25.09 ± 0.11	26.77	6%	50.68 ± 0.06	31.03	63%	64.1	204.7−18.1
HCG54	DY	0.38 ± 0.03	0.25	52%	0.71 ± 0.14	0.39	82%	0.56	0.44−0.04
HCG79	DO	0.96 ± 0.09	0.41	134%	2.32 ± 0.20	1.14	103%	9.33	14.9−1.31
HCG92	DO	0.58 ± 0.06	0.33	76%	3.01 ± 0.30	1.26	139%	31.6	39.9−3.48

Notes.

^(a)

Integrated IRAS fluxes from Allam et al. (1996) and Sanders et al. (2003) for each group, upper limits are not included.

^(b)

Predicted “synthetic” flux for the whole group by adding the corresponding values of all group members estimated using their SED fit.

^(c)

The intragroup dust masses were estimated using Eq. (1) at 100 μm, for β = 1.5 and T ranging between 15−20 K.

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