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The Extended Dust Emission around GK Per

  • S. M. Dougherty (a1), L. B. F. M. Waters (a2) (a3), M. F. Bode (a1), H. M. Lloyd (a1), D. J. M. Kester (a3) and TJ. R. Bontekoe (a3) (a4)...

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GK Per, a classical nova system that erupted in 1901, is one of the more unusual examples of its type. It has the longest known orbital period for a classical nova (1.997d; Crampton, Cowley & Fisher 1986); and it contains a white dwarf primary with an evolved K2 sub-giant secondary. Most remarkably, the IRAS Sky Survey (1991) reveals that GK Per exhibits far-IR dust emission extending ~ 17′ to the NW and SE of the nova (Bode et al. 1987; Seaquist et al. 1989). We have re-analysed the IRAS data using maximum entropy reconstruction (Bontekoe et al. 1991; Bontekoe, Koper & Kester 1994) to resolve structures at a spatial resolution approaching the diffraction limit of IRAS, which is 1′ at 60 μm and 1.7′ at 100/μm.

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References

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Bode, M.F., Seaquist, E.R., Frail, D.A., et al., 1987, Nature, 329, 519
Bontekoe, Tj.R., Kester, D.J.M., Price, S.D., et al., 1991, A&A, 248, 328
Bontekoe, Tj.R., Koper, E., Kester, D.J.M., 1994, A&A, 284, 1037
Crampton, D., Cowley, A.P., Fisher, W.A. 1986, Ap. J., 300, 788
Dougherty, S.M., Waters, L.B.F.M., Bode, M.F., et al., 1996, A&A, in press
IRAS Sky Survey Atlas Explanatory Supplement, 1991, Wheelock, S., Gautier, T.N., Chillemi, J., et al., (eds.)
Scott, A.D., Rawlings, J.M.C., Evans, A., 1994, MNRAS, 269, 707
Seaquist, E.R., Bode, M.F., Frail, D.A., et al., 1989, Ap. J., 344, 805

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