Detection of Pulsations and a Non-Stable Wind in IRAS 01005+7910, an Object with the B[e] Phenomenon

А. С. Мирошниченко, Valentina G. Klochkova, Vladimir E. Panchuk, E. S. Islentieva

Data confidence 70 medium

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Abstract

We present new results of the investigation of the optical spectrum features of the central star with the B[e] phenomenon in the system of the IR-source IRAS 01005+7910 using high-resolution (R≥ 60,000) spectroscopy data taken by the 6 m BTA telescope with the NES spectrograph. Comparison of the spectra obtained at different times shows significant variations in the complex Hα and Hβ line profiles, such as a systematic increase in their emission peak strengths in 2025–2026 compared to those observed in 2013 as well as a strong variability in their wind component. A detected variable radial velocity V⊙ from −20 to −68 km s−1 with a standard deviation of the mean value of K = 8.0 km s−1 can be interpreted as a result of pulsations or the presence of a companion. The stationary positions of forbidden lines with a mean radial velocity of V⊙=−51.38±0.26 km s−1 are taken as an improved systemic velocity. Overall, a set of properties of IRAS 01005+7910 points to its status as a post-AGB star, which has undergone the hot-bottom burning phase.