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Search for the remnants of the 1977-1986 outburst in the quiescent phase of CH Cygni


Jurdana, Rajka; Kotnik-Karuza, Dubravka
Search for the remnants of the 1977-1986 outburst in the quiescent phase of CH Cygni // Astronomy and Astrophysics Supplement Series, 108 (1994), 533-545 (međunarodna recenzija, članak, znanstveni)


Naslov
Search for the remnants of the 1977-1986 outburst in the quiescent phase of CH Cygni

Autori
Jurdana, Rajka ; Kotnik-Karuza, Dubravka

Izvornik
Astronomy and Astrophysics Supplement Series 108 (1994); 533-545

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Stars:CH Cyg - binaries: symbiotics - stars:atmospheres

Sažetak
We present the results of spectroscopic measurements of line spectra of the symbiotic star CH Cygni in the optical region of the EM spectrum. The observations extend over a period of two years (1987-89) and cover the quiescent state of the star. Although in most spectra the flat transition part of the curve of growth was predominant, a refined fitting procedure made possible the evaluation of the excitation temperature and microturbulent velocity for neutral metals in the red giant's photosphere. A regular decrease of the excitation temperature within the same interval for the investigated elements has been found, with the exception of Fe I for which the temperatures are higher. The microturbulent velocities show small erratic variations around a mean value, which is greater for Fe I than for the other elements. This could be explained by a stratification in the photosphere of the cool component.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
009026

Ustanove
Filozofski fakultet, Rijeka

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • SCI-EXP, SSCI i/ili A&HCI