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Article overview
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Structure of the hot object in the symbiotic prototype Z And during its 2000-03 active phase | A. Skopal
; A. Vittone
; L. Errico
; M. Otsuka
; S. Tamura
; M. Wolf
; V. Elkin
; | Date: |
27 Mar 2006 | 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. | Source: | arXiv, astro-ph/0603718 | Services: | Forum | Review | PDF | Favorites |
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