A&A 375, 579-583 (2001)
DOI: 10.1051/0004-6361:20010865

Internal and external shock fronts in He2-104

M. Contini^{1, 2} and L. Formiggini<sup>3, 4

1</sup>  School of Physics & Astronomy, Tel Aviv University, 69978 Tel Aviv, Israel
²  Astrophysikalisches Institut Potsdam, An der Sternwarte, 16, 14482 Potsdam, Germany
³  Wise Observatory, Tel Aviv University, 69978 Tel Aviv, Israel
⁴  Istituto di Radioastronomia, CNR, via P. Gobetti 101, 40129 Bologna, Italy

(Received 21 December 2000 / Accepted 12 June 2001)

Abstract
The spectra of both the inner and outer nebulae in He2-104 are modelled by composite models which account consistently for photoionisation and shocks. The temperature of the hot star is found K. We suggest that the characteristic "crab legs" in He2-104 are produced by R-T instability at the shock front. The calculated X-ray flux is below the detection limit of ROSAT.

Key words: shock waves -- stars: binaries: symbiotic -- stars: individual: He2-104

Offprint request: M. Contini, contini@ccsg.tau.ac.il

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