Open Access

Table B.1

Daily production rates in C/2021 A1 in November-December 2021.

UT date (mm/dd.dd) Molecule rh (au) Production rate (×1025 molecules s−1) Lines (a)
11/12.19 HCN 1.218 1.7 ± 0.5 1
11/14.18 HCN 1.187 3.1 ± 0.4 1
11/16.18 HCN 1.157 2.9 ± 0.2 1

12/08.46 HCN 0.826 3.4 ± 0.2 1
12/09.46 HCN 0.812 3.4 ± 0.1 1
12/10.32 HCN 0.800 3.2 ± 0.1 1
12/11.58 HCN 0.785 4.6 ± 0.2 2
12/12.40 HCN 0.774 3.1 ± 0.1 1
12/13.40 HCN 0.762 3.5 ± 0.1 1
12/09.50 HNC 0.812 0.28 ± 0.05 1
12/10.37 HNC 0.800 0.24 ± 0.05 1
12/11.62 HNC 0.784 0.51 ± 0.12 1
12/12.40 HNC 0.774 0.22 ± 0.08 1
12/13.47 CH3CN 0.761 0.59 ± 0.06 7+(2)
12/08.55 H2S 0.824 3.8 ± 1.5 (1)
12/10.53 H2S 0.798 8.1 ± 1.1 1
12/12.60 H2S 0.772 6.0 ± 4.6 (1)
12/13.63 H2S 0.759 4.4 ± 1.2 1+(1)
12/08.55 CS 0.824 3.6 ± 0.4 1
12/10.53 CS 0.798 3.7 ± 0.2 1
12/12.48 CS 0.773 2.6 ± 0.1 1
12/13.59 CS 0.760 2.9 ± 0.1 2
12/08.55 H2COd(b) 0.824 9.5 ± 2.8 1
12/10.53 H2COd 0.798 11.8 ± 1.8 1
12/11.52 H2COd 0.785 14.6 ± 2.5 1
12/12.60 H2COd 0.772 10.2 ± 0.6 2+
12/13.55 H2COd 0.760 8.6 ± 1.1 2+(2)
12/08.54 CH3OH 0.824 35 ± 5 4+(8)
12/09.50 CH3OH 0.812 37 ± 7 1
12/10.51 CH3OH 0.798 44 ± 3 11
12/11.60 CH3OH 0.784 43 ± 7 3+(16)
12/12.49 CH3OH 0.774 38 ± 1 13+(6)
12/13.53 CH3OH 0.760 28 ± 2 16+(14)

Notes. Subscript “d” has been added to the molecules for which a daughter Haser density profile is assumed with the parent scale length provided below.

(a)Number of lines used for the determination of Q, in parentheses the number of lines that are not individually detected.

(b)Where we assume that H2CO is produced in the coma with a Haser parent scale length of 1500 km in December.

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