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ISO observations of the classical nova V705 Cas

A. Salama 1 - S. Eyres 2 - A. Evans 2

1 ISO Operations Centre, Vilspa, Madrid -
2 Physics Department, Keele University

We present observations of Nova Cas 1993 (V705 Cas) obtained with ISO. We have detected the [OIV] fine structure line at 26 $\mu$ m and [CII] at 157 $\mu$ m. Preliminary analysis suggest that elemental abundances similar to those in the ejecta of DQ Her, and a hot (~ 700000K) stellar remnant, are consistent with the ISO observations. The dust shell, which was prominent in the near infrared in ground-based observations, was not detected by ISO, unless the stellar remnant had `switched off' by the time of the ISO observations. On the other hand, we may have detected a pre-existing dust shell.

Postscript version