The hot corino-like chemistry of four FUor-like protostars

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Volume 696 (April 2025)

A&A, 696 (2025) A18

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Table 6

Best-fit parameters obtained for V346 Nor assuming a source size of 0.177″.

Species	n_lines	E_up (K)	N (cm⁻²)	T_ex (K)	FWHM (km s⁻¹)	v_LSR (km s⁻¹)
COMs with free parameters

CH₃OH	13	56–835	$({2.06}_{- 0.04}^{+ 0.04}) \times 10^{8}$ $\left( {2.06_{ - 0.04}^{ + 0.04}} \right) \times {10^8}$	${210.70}_{- 3.00}^{+ 3.90}$ $210.70_{ - 3.00}^{ + 3.90}$	${5.43}_{- 0.06}^{+ 0.10}$ $5.43_{ - 0.06}^{ + 0.10}$	$- {4.66}_{- 0.01}^{+ 0.05}$ $- 4.66_{ - 0.01}^{ + 0.05}$
CH₂DOH	3	113–167	$({5.98}_{- 1.34}^{+ 0.92}) \times 10^{17}$ $\left( {5.98_{ - 1.34}^{ + 0.92}} \right) \times {10^{17}}$	${245.40}_{- 53.10}^{+ 36.37}$ $245.40_{ - 53.10}^{ + 36.37}$	${3.91}_{- 0.16}^{+ 0.16}$ $3.91_{ - 0.16}^{ + 0.16}$	$- {4.71}_{- 0.09}^{+ 0.08}$ $- 4.71_{ - 0.09}^{ + 0.08}$
CH₃CHO	17	65–357	$({1.71}_{- 0.14}^{+ 0.15}) \times 10^{16}$ $\left( {1.71_{ - 0.14}^{ + 0.15}} \right) \times {10^{16}}$	${123.30}_{- 12.70}^{+ 13.30}$ $123.30_{ - 12.70}^{ + 13.30}$	${5.04}_{- 0.18}^{+ 0.24}$ $5.04_{ - 0.18}^{ + 0.24}$	$- {5.46}_{- 0.10}^{+ 0.11}$ $- 5.46_{ - 0.10}^{ + 0.11}$
CH₃OCH₃	8	81–253	$({7.28}_{- 0.67}^{+ 0.73}) \times 10^{16}$ $\left( {7.28_{ - 0.67}^{ + 0.73}} \right) \times {10^{16}}$	${152.00}_{- 11.30}^{+ 9.30}$ $152.00_{ - 11.30}^{ + 9.30}$	${5.37}_{- 0.15}^{+ 0.11}$ $5.37_{ - 0.15}^{ + 0.11}$	$- {4.73}_{- 0.04}^{+ 0.03}$ $- 4.73_{ - 0.04}^{ + 0.03}$
CH₃OCHO	7	106–312	$({6.12}_{- 0.35}^{+ 0.49}) \times 10^{16}$ $\left( {6.12_{ - 0.35}^{ + 0.49}} \right) \times {10^{16}}$	${156.40}_{- 8.10}^{+ 11.80}$ $156.40_{ - 8.10}^{ + 11.80}$	${4.99}_{- 0.33}^{+ 0.18}$ $4.99_{ - 0.33}^{ + 0.18}$	$- {4.69}_{- 0.13}^{+ 0.08}$ $- 4.69_{ - 0.13}^{ + 0.08}$
C₂H₅CN	9	147–311	$({2.98}_{- 0.17}^{+ 0.18}) \times 10^{15}$ $\left( {2.98_{ - 0.17}^{ + 0.18}} \right) \times {10^{15}}$	${161.35}_{- 14.65}^{+ 25.10}$ $161.35_{ - 14.65}^{ + 25.10}$	${4.87}_{- 0.20}^{+ 0.38}$ $4.87_{ - 0.20}^{ + 0.38}$	$- {3.73}_{- 0.12}^{+ 0.13}$ $- 3.73_{ - 0.12}^{ + 0.13}$

COMs with T_ex = 210.7 K, FWHM = 5.43 km s^–1 and v_LSR = −4.66 km s^–1

CH₃OH	13	56–835	$({2.04}_{- 0.03}^{+ 0.03}) \times 10^{18}$ $\left( {2.04_{ - 0.03}^{ + 0.03}} \right) \times {10^{18}}$
CH₂DOH	3	113–167	$({3.40}_{- 0.03}^{+ 0.03}) \times 10^{17}$ $\left( {3.40_{ - 0.03}^{ + 0.03}} \right) \times {10^{17}}$
CH3CHO	17	65–347	$({2.17}_{- 0.05}^{+ 0.05}) \times 10^{16}$ $\left( {2.17_{ - 0.05}^{ + 0.05}} \right) \times {10^{16}}$
CH3OCH3	8	81–253	$({1.10}_{- 0.02}^{+ 0.02}) \times 10^{17}$ $\left( {1.10_{ - 0.02}^{ + 0.02}} \right) \times {10^{17}}$
CH3OCHO	7	106–312	$({7.68}_{- 0.16}^{+ 0.20}) \times 10^{16}$ $\left( {7.68_{ - 0.16}^{ + 0.20}} \right) \times {10^{16}}$
C2H5CN	9	147–311	$({2.85}_{- 0.07}^{+ 0.07}) \times 10^{15}$ $\left( {2.85_{ - 0.07}^{ + 0.07}} \right) \times {10^{15}}$

Notes. In the case of a single value of E_up, when n_lines > 1 it means that those lines are all within 1 K of each other.

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