3 papers
astro-ph.SR2026
Photometric and Spectral Evolution of the Symbiotic Nova HM Sagittae since 2003
N. P. Ikonnikova, V. I. Shenavrin, G. V. Komissarova +2
We present photometric and spectral monitoring of the symbiotic system HM Sge, which consists of a Mira variable with a dust shell and a hot white dwarf ionizing the surrounding ga…
astro-ph.SR2025
IRAS 22272+5435 (V354 Lac): Multicolor Photometry of a Variable Carbon-rich post-AGB Star and a Dust Formation Episode
N. P. Ikonnikova, V. I. Shenavrin, G. V. Komissarova +1
We present new UBV photometric observations (2009-2024) of the carbon-rich post-AGB star IRAS 22272+5435 (V354 Lac), combined with our data spanning over 30 years (1991-2024). The…
astro-ph.SR2025
Disk in the circumstellar envelope of carbon Mira V Cygni
Boris S. Safonov, Sergey G. Zheltoukhov, Andrey M. Tatarnikov +2
AGB stars are the primary source of dust and complex molecules in the interstellar medium. The determination of outflow parameters is often hindered by the unknown geometry of the…