EDP Sciences
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Volume 394, Number 3, November II 2002
Page(s) 971 - 974
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20021229

A&A 394, 971-974 (2002)
DOI: 10.1051/0004-6361:20021229

The interstellar extinction to V4334 Sgr (Sakurai's object)

A. Evans1, T. R. Geballe2, B. Smalley1, V. H. Tyne1 and S. P. S. Eyres3

1  Department of Physics, Keele University, Keele, Staffordshire, ST5 5BG, UK
2  Gemini Observatory, 670 N. A'ohoku Place, Hilo, HI 96720, USA
3  Centre for Astrophysics, University of Central Lancashire, Preston, Lancashire, PR1 2HE, UK

(Received 8 August 2002 / Accepted 26 August 2002)

We present an 8-13 $~\mu$m spectrum of V4334 Sgr (Sakurai's object), which shows clear evidence for the presence of a silicate absorption feature at 9.7 $~\mu$m. We argue that the feature is interstellar in origin, and on this basis we determine the interstellar extinction to V4334 Sgr to be $E(B-V)=0.66\pm0.12$. This is the only determination of the extinction to V4334 Sgr to date that uses direct observation of the intervening material; as the reddening using this method is refined it will be of importance in determining the distance of V4334 Sgr, and hence in modelling its evolution.

Key words: stars: evolution -- ISM: dust, extinction -- infrared: ISM -- stars: individual: V4334 Sgr -- stars: variables: general

Offprint request: A. Evans, ae@astro.keele.ac.uk

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