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Home All issues Volume 524 (December 2010) A&A, 524 (2010) A91 Full HTML
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Table 3

N2H+(3−2) line parameters.

v LSR Δv T MB a τ tot b T ex
Source [km s-1] [km s-1] [K] [K]
IRAS 05399-0121 8.73 ± 0.02 0.67 ± 0.07 0.92 ± 0.04 3.08 ± 1.10 5.1 ± 0.3
SMM 1 9.30 ± 0.03 0.61 ± 0.09 0.66 ± 0.07 2.77 ± 1.48 4.6 ± 0.3
SMM 3 8.57 ± 0.03 0.71 ± 0.02 0.65 ± 0.08 0.92 ± 0.19 5.5 ± 0.5
IRAS 05405-0117 9.30 ± 0.03 0.68 ± 0.06 0.66 ± 0.07 1.48 ± 0.34c 5.0d
SMM 4e – – – – –
SMM 4 (2nd v-comp.) 1.60 ± 0.10 0.44 ± 0.25 0.35 ± 0.13 0.54 ± 0.26c 5.0d
SMM 5 9.43 ± 0.07 0.46 ± 0.13 0.17 ± 0.06 0.23 ± 0.09c 5.0d
SMM 6 9.52 ± 0.03 0.58 ± 0.09 0.53 ± 0.08 0.99 ± 0.24c 5.0d
Ori B9 N 8.78 ± 0.13 0.22 ± 0.32f <0.07 <0.10c 5.0d
Ori B9 N (2nd v-comp.) 2.07 ± 0.10 0.43 ± 0.22 0.10 ± 0.05 0.13 ± 0.07c 5.0d
SMM 7 3.96 ± 0.14 0.66 ± 0.22 0.13 ± 0.08 0.17 ± 0.11c 5.0d

Notes.

(a)

The error in TMB is the 1σ rms noise error.

(b)

τtot is the total optical thickness of the hyperfine multiplet.

(c)

τtot could not be determined through fitting the hyperfine structure. Instead, τtot was calculated by assuming Tex = 5.0 K, and taking into account that the line intensity in Col. (4) accounts for 92.6% of the total line strength.

(d)

Assumed value.

(e)

The principal velocity component was not detected.

(f)

The associated error is larger than the value.

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