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Table 1

Observational parameters for our sample of debris disks.

Name LSR velocity LIR/L Ref. 3σint MH2 DiskFit MH2 from SCO
(km s-1) (Jy km s-1) (3σ upp. limit) M (3σ upp. limit) M

IRAM-30 m – CO J = 2 → 1

HD 2772 –5.4 8.2 × 10-6 1 <0.569 <0.110 <0.454
HD 14055 7.5 6.7 × 10-5 1 <0.387 <0.008 <0.027
HD 15115 –0.2 4.8 × 10-4 2 <1.89 <0.063 <0.229
HD 21620 –22.8 2.51 × 10-5 3 <0.622 <0.383 <0.819
HD 23642 –4.0 2.2 × 10-5 1 0.71 ± 0.18 0.18 ± 0.04 0.57 ± 0.14
HD 31295 –3.5 4.7 × 10-5 1 <0.768 <0.016 <0.058
HD 42111 8.4 1.00 × 10-5 3 <0.902 <1.02 <2.16
HD 159082 7.1 5.7 × 10-5 1 <0.497 <0.132 <0.537
HD 218396 –12.6 2.29 × 10-4 4 <0.349 <0.005 <0.032

APEX – CO J = 3 → 2

HD 225200 13.4 7.4 × 10-5 1 <3.15 <0.260 <0.470
HD 17848 16.7 4.8 × 10-5 1 <10.5 <0.146 <0.242
HD 24966 11.7 3.1 × 10-4 1 <2.85 <0.166 <0.278
HD 30422 –4.8 3.7 × 10-5 1 <2.22 <0.036 <0.063
HD 35850 1.4 2.3 × 10-5 1 <2.26 <0.007 <0.015
HD 38206 5.8 1.4 × 10-4 1 <2.78 <0.062 <0.119
HD 54341 20.0 1.9 × 10-4 1 <2.49 <0.106 <0.232
HD 71043 5.9 6.5 × 10-5 1 <2.74 <0.073 <0.131
HD 71155 –4.7 4.2 × 10-5 1 <2.66 <0.017 <0.035
HD 78072 2.5 2.5 × 10-4 1 <2.11 <0.071 <0.133
HD 136246 4.2 4.9 × 10-5 1 <2.47 <0.281 <0.459
HD 164249 2.5 7.2 × 10-4 1 <2.38 <0.020 <0.049
HD 166191 3.8 1.0 × 10-1 5 <2.77 <0.187 <0.351
HD 181296 14.3 2.4 × 10-4 1 <2.19 <0.014 <0.046
HD 182681 10.5 1.95 × 10-4 4 <2.91 <0.083 <0.124
HD 220825 –1.5 2.9 × 10-5 1 <2.29 <0.011 <0.046

Notes. Stars in italics are systems with earlier detection limits in one CO transition, see Sect. 2.1. The last three colums show the 3σ upper limits derived from our study: on the integrated intensity of CO, the H2 mass derived from DiskFit model and the H2 mass directly derived from the integrated flux. The integrated flux and the H2 masses for the tentative detection around HD 23642 are also displayed.

(∗)

The radial velocity of HD 54341 was kindly provided by F. Kiefer, see Kiefer (in prep.).

Reference. For LIR/L: 1 – Chen et al. (2014); 2 – Moór et al. (2011); 3 – Roberge & Weinberger (2008); 4 – Rhee et al. (2007); 5 – Schneider et al. (2013).

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