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.
Keywords
Cite
@article{arxiv.astro-ph/0603718,
title = {Structure of the hot object in the symbiotic prototype Z And during its 2000-03 active phase},
author = {A. Skopal and A. Vittone and L. Errico and M. Otsuka and S. Tamura and M. Wolf and V. Elkin},
journal= {arXiv preprint arXiv:astro-ph/0603718},
year = {2009}
}
Comments
18 pages (printed format), 9 figures, 4 tables, 2 appendices; accepted for publication in A&A (02/03/2006)