Identifying the mechanisms of water maser variability during the accretion burst in NGC6334I

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Volume 691 (November 2024)

A&A, 691 (2024) A157

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Table 3.

Properties of the identified pre-burst proper motions.

ID	Region	Offset ^(a)		Proper motion ^(b)		V_LSR	Detections ^(c)

		α	δ	μ_α	μ_δ

		(arcsec)	(arcsec)	(mas yr⁻¹)	(mas yr⁻¹)	(km s⁻¹)
1	CM2-W2	−0.35653	5.17924	2.6 (0.4)	2.9 (1.1)	−8.55	1100 [1–3 2–15]
2	CM2-W1	−0.07502	4.56777	2.7 (0.5)	2.5 (1.5)	−10.38	1100 [1–2 2–14]
3	MM1-W1	−0.27873	2.89027	−0.4 (0.1)	2.4 (0.5)	−2.77	1101 [1–1 2–2 4–2]
4	MM1-W1	−0.27810	2.88906	−0.4 (0.2)	−1.1 (0.7)	−3.01	0011 [3–2 4–3]
5	CM2-W2	−0.69000	5.29997	−1.3 (0.0)	1.7 (0.1)	−7.34	1111 [1–6 2–18 3–25 4–20]
6	CM2-W2	−0.68813	5.30081	−0.7 (0.2)	−1.8 (0.8)	−11.14	0011 [3–27 4–21]
7	CM2-W2	−0.66408	5.29855	−4.0 (0.3)	1.2 (0.9)	−20.08	0011 [3–21 4–25]
8	CM2-W2	−0.66616	5.30894	−3.0 (0.3)	14.7 (0.9)	−25.45	0011 [3–20 4–27]
9	CM2-W2	−0.64110	5.35781	−2.7 (0.2)	5.3 (0.6)	−14.75	0011 [3–31 4–30]
10	CM2-W2	−0.68843	5.30120	−0.9 (0.1)	0.1 (0.5)	−12.85	1111 [1–5 2–16 3–28 4–22]
11	CM2-W2	−0.68714	5.30214	−1.5 (0.3)	2.4 (1.0)	−13.14	0011 [3–26 4–23]
12	UCHII-W3	0.09454	1.30863	1.7 (0.3)	−23.3 (1.0)	−31.79	0011 [3–5 4–4]
13	UCHII-W1	−0.07786	−0.05531	0.2 (0.4)	−2.2 (1.2)	−15.21	1100 [1–13 2–11]
14	UCHII-W1	−0.07698	−0.05872	−1.2 (0.2)	0.9 (0.7)	−10.30	1001 [1–15 4–11]
15	UCHII-W1	−0.01769	0.04127	2.2 (0.1)	−13.4 (0.5)	−23.59	1110 [1–12 2–7 3–17]
16	UCHII-W1	−0.00633	0.01766	2.9 (0.1)	−15.9 (0.3)	−17.47	1110 [1–19 2–8 3–15]
17	UCHII-W1	0.10087	−0.16673	−1.0 (0.3)	−13.4 (0.8)	−21.63	1101 [1–17 2–22 4–9]
18	UCHII-W1	0.16962	−0.12107	4.2 (0.6)	−14.5 (1.9)	−34.04	1100 [1–16 2–23]
19	UCHII-W2	0.20347	0.46435	0.3 (0.5)	−12.1 (1.6)	−30.51	1100 [1–10 2–5]
20	UCHII-W2	0.20304	0.46359	0.0 (0.2)	−8.4 (0.6)	−30.64	1110 [1–11 2–6 3–7]

Notes. Uncertainties are in parentheses.

^(a)

Offset in terms of the reference maser of Chibueze et al. (2021) at (α, δ) = ( $17^{h} 20^{m} 52 \overset{s}{.} 600$ $17^{\mathrm{h}}20^{\mathrm{m}}52{{\overset{\text{s}}{.}}}600$ , $- 35 ° 45' 50 \overset{″}{.} 508$ $-35\circ45{\prime}50{{\overset{\prime\prime}{.}}}508$ ).

^(b)

In terms of the velocity frame described in Section 2.1.2.

^(c)

Epochs of maser detections. The IDs in square brackets are the maser features from Table 2 that were used in the fit.

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