Seven-year periodic variations in the methanol maser line displayed by the massive protostar IRAS 20216+4104

Open Access

Table 1

Variability characteristics of the spectral features.

V_p (km s⁻¹)	S_p (Jy)	R_a
−8.34	3.8	>7.5	26.3	1.2
−7.68	25.3	>89.2	1018.4
−7.02	16.4	11.3	57.8
−6.63	24.5	13.6	78.0
−6.10	31.0	1.9	3.5
−5.57	5.4	>16.4	59.3
−4.96	3.5	>11.4	42.7

Notes. V_p is the peak velocity, S_p is the average flux density, R_a is the relative amplitude, is the reduced χ², and is the corresponding value for 99.9% significance level of variability.

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