RESULTS OF LONG TIME PHOTOMETRIC AND SPECTRAL OBSERVATIONS OF HERBIG BE STAR AS 310
Keywords:
Pre-Main sequence stars, HBe stars, young stellar clusters, photometry, spectroscopy, variabilityAbstract
The results of spectral and photometric studies of Herbig’s Be-type star AS 310 have been presented. Photometric observations in the BVRcIc bands performed in 2016–2021 showed that the amplitude of the seasonal brightness variations of the star changes smoothly in different years and reaches a maximum of ΔV ∼ 0.6 mag in 2018. The star is more often in a weak state brightness,
but from time to time, there is an increase in brightness. With a decrease in brightness in the V-band, the star’s radiation in the blue color increases, while it weakens in the red part of the spectrum. Searches for periodic brightness changes have not revealed significant periods of variability. The emission components observed in the hydrogen lines are rather formed in the nebula where
the star itself is immersed. The spectrum contains strong lines of neutral helium, without any signs of emission components. The spectral class corresponds to the combined spectrum B3-5V + B1.5-2V. Our studies have shown that AS 310 is an extremely young binary star that has lost its circumstellar protoplanetary disk.
