Study of H<sub>2</sub>O and OH Masers in the Region Formation of a Young High Mass Stellar Object (S255 NIRS 3)

The results of a study of a star formation region are presented. S255 IR, where a young high-mass star is forming (20M•). Observations in H2O were carried out on RT-22 in Pushchino, and in the OH lines at the Large Radio Telescope in Nance (France). Data observations in the H2O line at 1.35 cm were used for the period 2017–2023. Our observations in H2O showed the existence strong flares, especially in 2023. Drift was also observed emission by radial velocity for most spectral details and predominantly in the direction of decreasing radial velocity. In OH lines 18 cm in 2008 no emission was detected. We observed OH emission in the main lines 1665 and 1667 MHz in 2015, 2023 and 2024. Structures of spectra, degrees of circular and linear polarizations varied greatly during these epoch. However, at the same time the longitudinal magnetic field vectors had predominantly two directions: relative to the vertical, i. e. almost perpendicular to the jet or along it. Zeeman splitting was detected only in the 1667 MHz line for one pair of features: 2.26 and 2.37 km/s. The amount of splitting 0.11 km/s corresponds to a longitudinal magnetic field value of 0.31 mGs; the field is directed towards the observer. It is assumed that the appearance of OH maser emission in 2015 associated with an accretion flares. Significant structure changes OH spectra, their degrees of polarization and very strong flares H2O maser in 2023 may be associated with a new possibility accretion flares in S255 IR.