Table 4
Results from CO line observations.
| Target name | F12CO (10−23 W m−2) | F13CO (10−23 W m−2) | FC18O (10−23 W m−2) | MCO (M⊕) | τ12CO |
|---|---|---|---|---|---|
| Detections |
|||||
| HD 9985 | 559.1±56.3 (6.9) | 316.9±32.4 (6.6) | 22.5±5.6 (5.2) | (2.2±0.2)×10−2 | 80±22 |
| HD 145101 | 80.4±10.3 (6.5) | 19.3±4.2 (3.7) | <10.1 | (10.3±2.3)×10−4 | 25±8 |
| HD 152989 | 67.7±10.7 (8.2) | <21.2 | <16.7 | (2.7±0.4)×10−5 | . . . |
| HD 155953 | 567.5±60.8 (21.7) | 134.5±15.9 (8.5) | 20.9±6.7 (6.4) | (7.0±0.8)×10−3 | 24±4 |
| HD 170116 | 40.5±8.4 (7.3) | <21.5 | <18.8 | (4.4±0.9)×10−5 | . . . |
| HD 170116 (CO peak) | 28.5±4.0 (2.8) | <6.8 | <5.5 | (3.1±0.4)×10−5 | . . . |
Non-detections |
|||||
| HD 31305 | <25.1 | . . . | . . . | <1.6×10−5 | . . . |
| HD 112532 | <17.5 | . . . | . . . | <7.7×10−6 | . . . |
| HD 131960 | <31.8 | . . . | . . . | <2.1×10−5 | . . . |
| HD 141960 | <13.6 | . . . | . . . | <8.5×10−6 | . . . |
| HD 144277 | <22.1 | . . . | . . . | <1.4×10−5 | . . . |
| HD 159595 | <107.0 | . . . | . . . | <2.8×10−5 | . . . |
| HD 176497 | <25.4 | . . . | . . . | <1.8×10−5 | . . . |
Notes. Integrated CO line fluxes (12CO, 13CO, and C18O(2–1) fluxes for disks with detected 12CO emission and only the 12CO flux upper limits for non-detections) and CO mass estimates (MCO) for our 12 targets. The quoted uncertainties of the line fluxes are quadratic sums of the measurement errors (given in brackets) and the absolute calibration error (which were conservatively assumed to be 10%). For the three disks detected in both the 12CO and the 13CO emission lines, the last column provides the estimated 12CO optical depth. The quoted uncertainties of the τ12CO estimates are formal and only consider the uncertainties of the line flux measurements, but do not account for the uncertainties of the adopted isotopolog abundance ratio.
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