The symbiotic star H1-36. A composite model of line and continuum spectra from radio to ultraviolet

Abstract

In this paper we analyse the spectra of D-type SS H1-36 within a colliding-wind scenario. We aim to analyse the properties of this object taking into account the observational data along the whole electromagnetic spectrum, in order to derive a self-consistent picture able to interpret the nature of the system as a whole. After constraining the relative physical conditions by modelling more than 40 emission lines from radio to UV, we are able to explain the continuum spectral energy distribution by taking into account all the emitting contributions arising from both the stars, the dust shells and the gaseous nebulae. A comprehensive model of the radio spectra allows to reproduce the different slopes of the radio profile and the turnover frequency, as well as the different size of the observed shocked envelope at different frequencies in the light of the different contributions from the expanding and reverse nebulae. The IR continuum unveils the presence of two dust shells with different radii and temperatures, which might be a distinctive feature of D-type symbiotic systems as a class of objects. The broad profiles of IR lines direct us to investigate whether an X-ray jet may be present. This insight leads us to indicate H1-36 as a promising X-ray target and to encourage observations and studies which consistently take into account the complex nature of symbiotic stars throughout the whole electromagnetic spectrum.

arXiv comment8 pages, 3 figures, 5 tables, accepted for publication in A&A on 2th May 2007

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Cited by in corpus (6)

• The spectral energy distribution of D-type symbiotic stars: the role of dust shells
• Discovery of a giant, highly-collimated jet from Sanduleak's star in the Large Magellanic Cloud
• Shock fronts in the symbiotic system BI Crucis
• The symbiotic star CH Cygni. II. The broad Ly alpha emission line explained by shocks
• An illumination effect and an eccentric orbit for the symbiotic binary PU Vul revealed by 32 years of optical spectroscopy
• The symbiotic system Z Andromedae : a spectral analysis of the anomalous 1984-1986 outburst