Zooming into the water snow line: High-resolution water observations of the HL Tau disk

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Table 3

Disk-integrated H₂O line fluxes in the HL Tau disk.

Molecule	Transition	Frequency (GHz)	Wavelength (μm)	Telescope	log(A_ul) log(s^-–1)	E_u (K)	g_u	Integrated flux (Jy km s^-–1)	$\frac{N_{above τ_{dust} = 1}}{N_{tot in disk}}$ ${{{{\cal N}_{{\rm{above }}{\tau _{{\rm{dust }}}} = 1}}} \over {{{\cal N}_{{\rm{tot in disk }}}}}}$	Refs.
p-H₂O	3_1,3–2_2,0	183.310	1635.44	ALMA	–5.44	205	7	0.91 ± 0.14	68.90%	1,2
o-H₂O	10_2,9–9_3,6	321.226	933.28	ALMA	–5.21	1861	63	0.27 ± 0.09	36.18%	1,2
p-H₂O	5_1,5–4_2,2	325.150	922.01	ALMA	–4.94	470	11	1.33 ± 0.09	35.42%	1
o-H₂O	2_2,1–2_1,2	1661.01	180.49	Herschel	–1.52	194	15	<153	1.78%	3
o-H₂O	2_1,2–1_0,1	1669.90	179.53	Herschel	–1.26	114	15	<153	1.76%	3
p-H₂O	4_1,3–3_2,2	2074.43	144.52	Herschel	–1.48	396	9	<361	1.08%	3
p-H₂O	3_2,2–2_1,1	3331.46	89.99	Herschel	–0.46	297	7	229 ± 38	0.35%	3
p-H₂O	6_1,5–5_2,4	3798.28	78.93	Herschel	–0.35	781	13	<110	0.26%	3
o-H₂O	4_2,3–3_1,2	3807.26	78.74	Herschel	–0.32	432	27	646 ± 100	0.25%	3
o-H₂O	8_1,8–7_0,7	4734.30	63.32	Herschel	0.24	1071	51	339 ± 115	0.16%	3,4
p-H₂O	16_3,13–15_2,14	24163.2	12.41	GN	0.63	4945	33	24 ± 13	0.02%	5
o-H₂O	17_4,13–16_3,14	24184.2	12.40	GN	0.89	5781	105	22 ± 13	0.02%	5
o-H₂O	16_4,13–15_1,14	24224.3	12.38	GN	0.63	4948	99	121 ± 13	0.02%	5

Notes. The H₂O line constants of the lines observed with ALMA or Herschel are taken from the JPL database (Pickett et al. 1998; Yu et al. 201200), and those observed with Gemini North are taken from the LAMDA database (Tennyson et al. 2001; Schöier et al. 2005; Barber et al. 2006; Faure & Josselin 2008). References: (1) Facchini et al. (2024), (2) this work, (3) Alonso-Martínez et al. (2017), (4) Riviere-Marichalar et al. (2012), and (5) Salyk et al. (2019).

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