Table A.1
Disk-averaged column density and abundance of CH3OH and H2CO in HD 163296 and TW Hya for varying Tex.
| Object | Line |  |
Eu | log(Aul) | Tex | ncrit | Navg | CH3OH∕H2 |  |
|---|---|---|---|---|---|---|---|---|---|
| (mJy km s−1) | (K) | (s−1) | (K) | (cm−3) | (cm−2) | ||||
| CH3OH | |||||||||
| HD 163296 | CH3OH 505–404 (E) | <51 | 47.9 | − 4.22 | 25 | 1.6(06) | <6.9(12) | <2.1(−11) | |
| 50 | 1.9(06) | <8.6(12) | <2.6(−11) | ||||||
| 75 | 2.1(06) | <1.1(13) | <3.5(−11) | ||||||
| CH3OH 505–404 (A) | <51 | 34.8 | − 4.22 | 25 | 4.3(05) | <4.1(12) | <1.3(−11) | ||
| 50 | 5.0(05) | <6.6(12) | <2.0(−11) | ||||||
| 75 | 5.0(05) | <9.6(13) | <3.0(−11) | ||||||
| CH3OH 110–101 (A) | <26 | 16.9 | − 3.49 | 25 | 4.3(07) | <7.0(11) | <2.2(−12) | ||
| 50 | 5.6(07) | <1.6(12) | <5.0(−12) | ||||||
| 75 | 6.4(07) | <2.7(12) | <8.2(−12) | ||||||
| CH3OH 211–202 (A) | <26 | 21.6 | − 3.49 | 25 | 5.0(06) | <5.0(11) | <1.6(−12) | ||
| 50 | 5.4(06) | <1.1(12) | <3.3(−12) | ||||||
| 75 | 5.5(06) | <1.7(12) | <5.2(−12) | ||||||
| TW Hya | CH3OH stackedc | 26.5 ± 2.7 | 28.6 | − 3.49 | 25 | 3.0(06) | 4.7(12) | 1.1(−12) | |
| 50 | 3.0(06) | 8.6(12) | 2.1(−12) | ||||||
| 75 | 3.1(06) | 1.3(13) | 3.2(−12) | ||||||
| H2CO | |||||||||
| HD 163296 | H2CO 312–211 | 890 ± 89 | 33.4 | − 3.55 | 25 | 5.7(06) | 2.1(12) | 6.3(−12) | <0.24 |
| 50 | 6.2(06) | 3.0(12) | 9.2(−12) | <0.43 | |||||
| 75 | 6.4(06) | 4.2(12) | 1.3(−11) | <0.50 | |||||
| TW Hya | H2CO 312–211 | 291 ± 29 | 33.4 | − 3.55 | 25 | 5.7(06) | 3.7(12) | 8.9(−13) | 1.27 ± 0.13 |
| 50 | 6.2(06) | 5.3(12) | 1.6(−12) | 1.62 ± 0.16 | |||||
| 75 | 6.4(06) | 7.5(12) | 1.8(−12) | 1.73 ± 0.17 | |||||
Notes. The format a(b) translates toa × 10b. Flux errors are dominated by systematic uncertainties, taken to be 10%. (a) Upper limits are derived at the 3σ level using the HD 163296 Keplerian mask (Sect. 3). (b) Ratios are determined using the CH3OH disk-integrated column density from Table 2. HD 163296: based on the strictest upper limit from the CH3 OH 211 –202 (A) line. TW Hya: based on the stacked CH3OH detection. (c)The stacked detection consists of three CH3OH transitions: CH3OH 211 –202 (A) at 304.208 GHz, CH3OH 312 –303 (A) at 305.472 GHz, and CH3OH 413 –404 at 307.166 GHz. Excitation parameters for the CH3OH 312 –303 (A) line are used to calculate column density. References.Rabli & Flower (2010); Wiesenfeld & Faure (2013); Walsh et al. (2016); Qi et al. (2013); Öberg et al. (2017).
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