Chemical composition of comets C/2021 A1 (Leonard) and C/2022 E3 (ZTF) from radio spectroscopy and the abundance of HCOOH and HNCO in comets

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Table 2

Time periods found to fit comet C/2022 E3 (ZTF) production rates.

Molecule	Q^(a) (molecules s⁻¹)	ΔQ⁽^b⁾ (molecules s⁻¹)	T_p (days)	Confidence Level or χ²	Method
H₂O	6.27 ± 0.07 × 10²⁸	0	0	$χ_{10}^{2} = 2.51$ $\[\chi_{10}^2=2.51\]$	Constant
H₂O	6.23 ± 0.08 × 10²⁸	0.31 ± 0.11 × 10²⁸	0.349 ± 0.022	$χ_{10}^{2} = 2.44$ $\[\chi_{10}^2=2.44\]$	Sine first order
CH₃OH	9.12 ± 0.18 × 10²⁶	1.69 ± 0.28 × 10²⁶	0.3841 ± 0.0029	$χ_{8}^{2} = 2.31$ $\[\chi_8^2=2.31\]$	Sine first order

Notes. ^(a)Mean production rate. ^(b)Amplitude in production rate of the sine fitting.

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