Naslov
Search for Signs of a New Outburst in the Quiescent State of CH Cygni II

Autori
Kotnik-Karuza, Dubravka ; Jurdana-Šepić, Rajka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Highlights of Astronomy XI / - , 1998, 386-386

Skup
23^rd General Assembly of the International Astronomical Union. IAU 23

Mjesto i datum
Kyoto, Japan, 15.08.1997. - 30.08.1997

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
symbiotic stars; CH Cygni; quiescence

Sažetak
Our high-resolution optical spectroscopic survey of the symbiotic star CH Cyg, extending over the quiescent period 1987-1989 between two outbursts, shows that the spectrum did not completely lose its symbiotic character. Moreover, signs of radiation of the hot source were present, not only as remnants from the previous outburst, but also as an indication of a new one. Some of the evidences which support this idea are following: - variation of excitation and vibration temperatures of neutral metals and TiO molecules respectively - untypical microturbulent velocity dependence of excitation potential of the lower state for Fe I - double-peaked Balmer profiles of Ha and Hb with temporary disappearance of the central absorption - presence of forbidden emission lines [FeII], [SII] and [NeIII] together with OIII with complex profile and variable intensity.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA