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 5

Best-fit parameters obtained for Haro 5a IRS assuming a source size of 0.1″.

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 and FWHM = 2.50 km s⁻¹

CH₃OH	5	56–374	$({9.88}_{- 1.13}^{+ 1.19}) \times 10^{16}$ $\left( {9.88_{ - 1.13}^{ + 1.19}} \right) \times {10^{16}}$	${225.10}_{- 23.77}^{+ 21.90}$ $225.10_{ - 23.77}^{ + 21.90}$		${13.76}_{- 0.23}^{+ 0.25}$ $13.76_{ - 0.23}^{ + 0.25}$
CH₃CHO	13	65–129	$({6.36}_{- 0.41}^{+ 0.53}) \times 10^{15}$ $\left( {6.36_{ - 0.41}^{ + 0.53}} \right) \times {10^{15}}$	${110.60}_{- 7.40}^{+ 6.64}$ $110.60_{ - 7.40}^{ + 6.64}$		${13.42}_{- 0.06}^{+ 0.07}$ $13.42_{ - 0.06}^{ + 0.07}$
CH₃OCH₃	4	81	$({2.30}_{- 0.21}^{+ 0.48}) \times 10^{16}$ $\left( {2.30_{ - 0.21}^{ + 0.48}} \right) \times {10^{16}}$	${127.50}_{- 7.70}^{+ 24.60}$ $127.50_{ - 7.70}^{ + 24.60}$		${13.71}_{- 0.04}^{+ 0.10}$ $13.71_{ - 0.04}^{ + 0.10}$
CH₃OCHO	3	109–109	$({1.67}_{- 0.20}^{+ 0.60}) \times 10^{16}$ $\left( {1.67_{ - 0.20}^{ + 0.60}} \right) \times {10^{16}}$	${87.50}_{- 18.70}^{+ 28.75}$ $87.50_{ - 18.70}^{ + 28.75}$		${13.72}_{- 0.12}^{+ 0.11}$ $13.72_{ - 0.12}^{ + 0.11}$

COMs with T_ex = 225.10K, FWHM = 2.50 km s⁻¹ and v_LSR = 13.76 km s⁻¹

CH₃OH	5	56–374	$({9.89}_{- 0.70}^{+ 0.64}) \times 10^{16}$ $\left( {9.89_{ - 0.70}^{ + 0.64}} \right) \times {10^{16}}$
CH₃CHO	13	65–129	$({1.34}_{- 0.08}^{+ 0.07}) \times 10^{16}$ $\left( {1.34_{ - 0.08}^{ + 0.07}} \right) \times {10^{16}}$
CH₃OCH₃	4	81	$({5.54}_{- 0.30}^{+ 0.29}) \times 10^{16}$ $\left( {5.54_{ - 0.30}^{ + 0.29}} \right) \times {10^{16}}$
CH₃OCHO	3	109-109	$({3.71}_{- 0.27}^{+ 0.28}) \times 10^{16}$ $\left( {3.71_{ - 0.27}^{ + 0.28}} \right) \times {10^{16}}$

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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