EDP Sciences
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Volume 375, Number 2, August IV 2001
Page(s) 579 - 583
Section Diffuse matter in space
DOI http://dx.doi.org/10.1051/0004-6361:20010865

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

Internal and external shock fronts in He2-104

M. Contini1, 2 and L. Formiggini3, 4

1  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)

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 $T_{*} \sim 130 000$ 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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