Pattern finding in millimetre-wave spectra of massive young stellar objects

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Volume 694 (February 2025)

A&A, 694 (2025) A20

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Table 4

Results from the LLE+GMM unsupervised classification.

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
GMM	T	M_gas	N_gas	$T_{{CH}_{3} OH}$ ${T_{{\rm{C}}{{\rm{H}}_3}{\rm{OH}}}}$	$N_{{CH}_{3} OH}$ ${N_{{\rm{C}}{{\rm{H}}_3}{\rm{OH}}}}$	$T_{{CH}_{3} CCH}$ ${T_{{\rm{C}}{{\rm{H}}_3}{\rm{CCH}}}}$	$N_{{CH}_{3} CCH}$ ${N_{{\rm{C}}{{\rm{H}}_3}{\rm{CCH}}}}$	$T_{{CH}_{3} CN}$ ${T_{{\rm{C}}{{\rm{H}}_3}{\rm{CN}}}}$	$N_{{CH}_{3} CN}$ ${N_{{\rm{C}}{{\rm{H}}_3}{\rm{CN}}}}$
group	(K)	(M_⊙)	(10²⁴ cm⁻²)	(K)	(10¹⁶ cm⁻²)	(K)	(10¹⁶ cm⁻²)	(K)	(10¹⁶ cm⁻²)
1	$20_{- 6}^{+ 18}$ ${20_{ - 6}^{ + 18}}$	$34_{- 6}^{+ 12}$ ${34_{ - 6}^{ + 12}}$	${8.4}_{- 3.4}^{+ 12.6}$ ${8.4_{ - 3.4}^{ + 12.6}}$	$20_{- 6}^{+ 10}$ ${20_{ - 6}^{ + 10}}$	${0.13}_{- 0.06}^{+ 0.34}$ ${0.13_{ - 0.06}^{ + 0.34}}$	$30_{- 16}^{+ 2}$ ${30_{ - 16}^{ + 2}}$	${0.55}_{- 0.31}^{+ 0.73}$ ${0.55_{ - 0.31}^{ + 0.73}}$	$30_{- 16}^{+ 16}$ ${30_{ - 16}^{ + 16}}$	${0.004}_{- 0.002}^{+ 0.033}$ ${0.004_{ - 0.002}^{ + 0.033}}$
2	$220_{- 20}^{+ 130}$ ${220_{ - 20}^{ + 130}}$	${7.8}_{- 3.3}^{+ 10.2}$ ${7.8_{ - 3.3}^{ + 10.2}}$	${1.9}_{- 0.8}^{+ 1.7}$ ${1.9_{ - 0.8}^{ + 1.7}}$	$220_{- 34}^{+ 34}$ ${220_{ - 34}^{ + 34}}$	$25_{- 19}^{+ 76}$ ${25_{ - 19}^{ + 76}}$	$60_{- 11}^{+ 20}$ ${60_{ - 11}^{ + 20}}$	${0.65}_{- 0.31}^{+ 0.36}$ ${0.65_{ - 0.31}^{ + 0.36}}$	$220_{- 20}^{+ 130}$ ${220_{ - 20}^{ + 130}}$	${0.5}_{- 0.4}^{+ 1.5}$ ${0.5_{ - 0.4}^{ + 1.5}}$
3	$300_{- 40}^{+ 200}$ ${300_{ - 40}^{ + 200}}$	$26_{- 14}^{+ 18}$ ${26_{ - 14}^{ + 18}}$	${5.6}_{- 3.2}^{+ 1.4}$ ${5.6_{ - 3.2}^{ + 1.4}}$	$250_{- 20}^{+ 4}$ ${250_{ - 20}^{ + 4}}$	$300_{- 51}^{+ 220}$ ${300_{ - 51}^{ + 220}}$	$75_{- 25}^{+ 15}$ ${75_{ - 25}^{ + 15}}$	${1.6}_{- 0.8}^{+ 0.7}$ ${1.6_{ - 0.8}^{ + 0.7}}$	$300_{- 40}^{+ 200}$ ${300_{ - 40}^{ + 200}}$	${6.6}_{- 3.6}^{+ 3.4}$ ${6.6_{ - 3.6}^{ + 3.4}}$

Notes. Columns: (1) Unsupervised classification group identification; (2), (3), and (4) Gas temperature, mass, and column density, respectively; rotational temperatures and column densities of CH₃OH (5) and (6), CH₃CN (7) and (8), and CH₃CCH (9) and (10), respectively, for the 32 YSO subsample for which rotational diagrams could be constructed.

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