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Table 2

HCO+ and HCN line measurements.

Source HCO+ (3–2) HCN (3–2)
  υ LSR σ rms max Tmb S/N peak Tmb FWHM Σ Tmb Δν ∫Tmb δν σ rms  δν
  [km s-1] [mK] [mK]a   [mK]b [km s-1] [mK km s-1]c [mK km s-1]d [mK] [mK km s-1]e
CI Tau 6.56 57 181 3.2 161 0.68 105 117  ±  32 76  <112
CW Tau 6.83f 55 241 4.4 259 0.39 92 108  ±  22 76  <112
   off 30′′ N 6.95 61 279 4.5 270 0.38 95 109  ±  27 ··· ···
   off 30′′ E 6.93 61 248 4.1 251 0.38 88 101  ±  24 ··· ···
CY Tau – 62 – – – 1.00 –  <92 110  <163
DG Tau 6.47 100 491 4.9 424 1.44 695 652  ±  72 41  <61
   off 30′′ N 6.07 58 203 3.5 174 0.43 89 79  ±  23 ··· ···
   off 30′′ E 6.13 65 251 3.9 247 0.47 107 124  ±  29 ··· ···
DN Tau 8.00 48 122 2.6 128 0.44 56 60  ±  18 85  <126
DO Tau 6.16 48 182 3.8 127 0.86 115 116  ±  26 67  <99
DQ Tau – 59 – – – 1.00 –  <88 81  <120
DR Tau – 65 – – – 1.00 –  <97 93  <138
FT Tau – 54 – – – 1.00 –  <80 87  <129
GO Tau 5.05 47 251 5.3 186g 1.93 327 383  ±  39 71  <105
   off 30′′ N 7.37 68 148 2.2 279 0.17 46 51  ±  19 ··· ···
   off 30′′ E 7.30 71 126 1.8 155 1.03 172 170  ±  44 ··· ···
IQ Tau – 80 – – – 1.00 –  <119 91  <135
UZ Tau – 66 – – – 1.00 –  <98 80  <119
V806 Tau 5.40 77 345 4.2 271 0.97 297 279  ±  45 100  <148
   off 30′′ N 5.80 61 162 2.6 201 0.25 82 52  ±  20 ··· ···
   off 30′′ E 5.59 68 164 2.4 149 0.39 76 62  ±  28 ··· ···
GO Tau 1h 4.40 47 268 5.7 237 0.54 100 136  ±  28 ··· ···
GO Tau 2 5.40 47 251 5.3 232 0.75 179 185  ±  28 ··· ···
GO Tau 3 6.34 47 143 3.0 125 0.35 50 46  ±  19 ··· ···

Notes. 

(a)

The maximum temperature value in the binned data;

(b)

the maximum determined by a Gaussian fit to the line using the CLASS Gauss fitting routine;

(c)

a sum of the individual channels from the binned data to be compared to the integrated fit;

(d)

for non-detections we report a 3σ upper limit where σ = 1.2 and we assume a line width ΔV of 1.0 km s-1;

(e)

upper limits are reported in the same way as for HCO+;

(f)

we have determined that the emission detected here is not associated with the circumstellar disk;

(g)

statistics are reported for a single Gaussian fit, which may not be realistic for this source;

(h)

statistics for the individual peaks toward GO Tau, measured as they appear from left to right in Fig. 1.

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