Water deuterium fractionation in the low-mass protostar NGC1333-IRAS2A

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Table 1

Parameters of the HDO observations.

Telescope	Transition	Frequency	E_up	Beam	B_eff	rms^b	Resolution	T_peak^b	Δv	∫T_mbdv
		GHz	K	′′		mK	km s^-1	mK	km s^-1	K km s^-1

NGC 1333-IRAS2A
IRAM	1_1,0–1_1,1	80.578	46.8	31.2	0.78	11.6	0.15	17.8	3.9 ± 1.1	0.07 ± 0.02
IRAM	3_1,2–2_2,1	225.897	167.7	11.1	0.57	24.7	0.10	113.5	4.2 ± 0.3	0.50 ± 0.03
IRAM	2_1,1–2_1,2	241.561	95.3	10.4	0.46	30.8	0.19	98.6	4.1 ± 0.5	0.43 ± 0.05
JCMT	1_0,1–0_0,0	464.924	22.3	10.8	0.44^a	125	0.20	305.8	6.2 ± 0.8	2.00 ± 0.23
APEX	1_1,1–0_0,0	893.639	42.9	7.0	0.35	210	0.25	...	...	...

Outflow-position
IRAM	1_1,0–1_1,1	80.578	46.8	31.2	0.78	11.5	0.15	...	...	≤0.03^c
IRAM	3_1,2–2_2,1	225.897	167.7	11.1	0.57	21.1	0.10	...	...	≤0.04^c
JCMT	1_0,1–0_0,0	464.924	22.3	10.8	0.44^a	241	0.20	...	...	≤0.72^c

Notes.

^(a)

Values as observed on Jupiter during the second semester of 2004 with the RxW-C receiver.

^(b)

T_mb scale.

^(c)

σ upper limit of integrated flux with assumption that Δv is 5 km s^-1.

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