Monitoring of the polarized H2O maser emission around the massive protostars W75N(B)-VLA 1 and W75N(B)-VLA 2

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Table 5.

Polynomial fit parameters of the H₂O maser features of zones 1 of VLA 2.

(1)	(2)	(3)	(4)	(5)	(6)
Epoch	a^(a)	b^(a)	c^(a)	R²^(b)	Proper motion
					(mas yr⁻¹)	(km s⁻¹)
2014.46	−0.00757	8.08	−2714	0.85	−	−
2016.45	−0.0204	23.9	−7595	0.89	−	−
2018.44	−0.0118	13.3	−4332	0.96	−	−
2020.82	−0.00669	6.93	−2365	0.94	−	−
					−2.5 ^(c)	−15.4 ^(c)

Notes.

^(a)

Considering the equation of a polynomial of second order y = ax² + bx + c.

^(b)

R² is the coefficient of determination of the polynomial fit.

^(c)

Between epoch 2014.46 and epoch 2020.82. The minus sign indicates that the motion is opposite to the expansion velocity measured by S14.

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