Symbiotic Nova PU Vul - 33 Years of Observations

Baltic astronomy

article

S. Shugarov¹  D. Chochol¹  E. Kolotilov² 

[1] Astronomical Institute, Slovak Academy of Science;Sternberg Astronomical Institute, University avenue 13

关键词: stars;    binaries;    symbiotic;    novae;    eclipsing;    AGB;    techniques;    photometric;   

DOI  :  10.1515/astro-2017-0369

来源: Institute of Theoretical Physics and Astronomy

【 摘 要 】

We present UBVRI light curves of the symbiotic nova PU Vul after its outburst in 1978. Three observed eclipses of the hot component by the cool one were used to determine the ephemeris of the binary system as JD (Min I) = 2444550(15) + 4897(10) × E days. the 194-day shift of the secondary minimum from its expected positions in 2001 suggests the eccentricity of the binary orbit. Period analysis of the VRI photometry improved the pulsation period of the cool AGB variable in the system to P = 217.7 days. Pulsation of the cool component is detected only in the phases around the primary minimum, when the visible hemisphere of the AGB star is not influenced by the interaction with the hot component.

【 授权许可】

Unknown