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Table 2

H3O+ line resultsa.

Galaxy Vline δV TA*
[K km s-1] [km s-1] [km s-1] [mK]

IC 342
08-2008:b
H3O+ 0.30 ± 0.07 39 ± 10 75 ± 18 3.7
02-2008:b
H3O+ 0.22 ± 0.06 40 ± 5 39 ± 13 5.4
(U-line 0.38 ± 0.05 263 ± 2 30 ± 5 11.6)
NGC 253 9.35 ± 0.18 221 ± 2 180 ± 4 48.8
NGC 1068d 0.52 ± 0.05 1120 ± 8 160 ± 20 3.0
NGC 4418 1.02 ± 0.06 2129 ± 5 171 ± 11 5.6
NGC 6240 0.32 ± 0.05 7179 ± 15 177 ± 27 1.7
IRAS 15250  < 0.012c ...    ...     < 1.0
Arp 299  < 0.020d ...    ...     < 2.0

Notes. 

(a)

Integrated line intensities and peak line intensities are given in , ηmb is 0.65–0.7 and we have adopted 0.7 here for conservative values of N(H3O+).

(b)

Data reduction of H3O+ and U-line taken at JCMT 02-2008 and 08–2008.

(c)

1σ upper limit for a FWHM linewidth of 500 km s-1.

(d)

1σ upper limit for a FWHM linewidth of 300 km s-1. The pointing centre of HARP was in between the two nuclei. We added the spectra in the three emission regions of Arp 299 covered by HARP to produce a spectrum with a 1σ upper limit of 2 mK.

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