Accelerating infall and rotational spin-up in the hot molecular core G31.41+0.31

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Volume 615 (July 2018)

A&A, 615 (2018) A141

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Table 4

Upper level energy and velocity of the red-shifted absorption with respect to the systemic LSR velocity.

	E_up	\|V_LSR − V_red\|
Line	(K)	(km s⁻¹)
H₂CO (3_0,3 − 2_0,2)	21	2.1±1.3
H₂CO (3_2,2 − 2_2,1)	68	4.0±1.3
H₂CO (3_2,1 − 2_2,0)	68	2.9±1.3
CH₃CN K=2 (12–11)	97	5.1±0.2
CHCN K=2 (12–11)	97	5.8±0.2
¹³CH₃CN K=2 (13–12)	106	7.4±0.3
CH₃CN K=3 (12–11)	133	5.1±0.2
¹³CH₃CN K=3 (13–12)	142	> 7.6^a
CH₃CN K=4 (12–11)	183	5.5±0.2
CHCN K=5 (12–11)	246	6.1±0.2
CH₃CN K=5 (12–11)	247	> 6.0^a
¹³CH₃CN K=5 (13–12)	256	8.4±0.3
CH₃CN K=6 (12–11)	326	> 5.7^a
CH₃CN K=8 (12–11)	526	> 6.0^a
CH₃CN K, l=(3, − 1) v₈=1 (12–11)	705	6.9±0.3
CH₃CN K, l=(6, 1) v₈=1 (12–11)	778	7.2±0.3

Notes. Thevelocity of the absorption feature has been measured toward the dust continuum peak and corresponds to that of the spectral channel with the lowest intensity at that position. ^(a) Line slightly blended with other lines at frequencies lower than the rest frequency.

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