Structure of the hot object in the symbiotic prototype Z And during its 2000-03 active phase

Abstract

Aims: To investigate structure of the hot object in the symbiotic prototype Z And during its major 2000-03 active phase. Methods: Analysis of the far ultraviolet, optical low- and high-resolution spectroscopy and UBVR photometry. Reconstruction of the spectral energy distribution (SED) during the outburst. The Raman scattering process. Results: At the initial stages of the outburst the hot object was characterized by the two-temperature spectrum (a warm stellar radiation and a strong nebular emission) with signatures of a mass-outflow at moderate (100-200 km/s) and very high (1000-2000 km/s) velocities. The corresponding structure of the hot object consists of an optically thick, slowly-expanding disk-like material encompassing the accretor at the orbital plane and a fast optically thin wind over the remainder of the star. A striking similarity of [FeVII]6087 and Raman 6825 profiles at/after the dilution of the disk suggested their origin within the interaction zone where the winds from the binary components collide.

18 pages (printed format), 9 figures, 4 tables, 2 appendices; accepted for publication in A&A (02/03/2006)

References in corpus (13)

• Line formation in solar granulation: IV. [O I], OI and OH lines and the photospheric O abundance
• Overview of the Far Ultraviolet Spectroscopic Explorer Mission
• On-Orbit Performance of the Far Ultraviolet Spectroscopic Explorer (FUSE) Satellite
• The NextGen Model Atmosphere grid: II. Spherically symmetric model atmospheres for giant stars with effective temperatures between 3000 and 6800~K
• Line formation in solar granulation VI. [C I], C I, CH and C2 lines and the photospheric C abundance
• Disentangling the composite continuum of symbiotic binaries I. S-type systems
• A "Combination Nova" Outburst in Z Andromedae: Nuclear Shell Burning Triggered by a Disk Instability
• A radio jet in the prototypical symbiotic star Z And?
• Raman-Scattering Wings of H alpha in Symbiotic Stars
• Contemporaneous Observations of Direct and Raman Scattered O VI in Symbiotic Stars
• Broad H$\alpha$ Wing Formation in the Planetary Nebula IC 4997
• Discovery of the eclipse in the symbiotic binary Z Andromedae
• Correction of UBV photometry for emission lines

Cited by in corpus (20)

• Broad H-alpha wings from the optically thin stellar wind of the hot components in symbiotic binaries
• Transient jets in the symbiotic prototype Z Andromedae
• Recent photometry of symbiotic stars - XII
• Early evolution of the extraordinary Nova Del 2013 (V339 Del)
• The GALAH Survey and Symbiotic Stars. I. Discovery and follow-up of 33 candidate accreting-only systems
• New outburst of the symbiotic nova AG Peg after 165 years
• The origin of the supersoft X-ray--optical/UV flux anticorrelation in the symbiotic binary AG Draconis
• Recent photometry of symbiotic stars - XIII
• Multiwavelength modelling the SED of supersoft X-ray sources. I. The method and examples
• Formation of a disk structure in the symbiotic binary AX Per during its 2007-10 precursor-type activity
• Evidence for bipolar jets from the optical spectra of the prototypical symbiotic star Z Andromedae
• Bipolar ejection by the symbiotic binary system Z And during its 2006 outburst
• Electron optical depths and temperatures of symbiotic nebulae from Thomson scattering
• Ionization structure of hot components in symbiotic binaries during active phases
• Repeated transient jets from a warped disk in the symbiotic prototype Z And: A link to the long-lasting active phase
• Multiwavelength modeling the SED of nova V339~Del: Stopping the wind and long-lasting super-Eddington luminosity with dust emission
• Formation of a disk-structure and jets in the symbiotic prototype Z And during its 2006-2010 active phase
• The emergence of a neutral wind region in the orbital plane of symbiotic binaries during their outbursts
• The hydrogen and helium lines of the symbiotic binary Z And during its brightening at the end of 2002
• A collimated wind interpretation for the spectral variability of Z And during its major 2006 eruption