Deep optical imaging of nova remnants II. A southern-sky sample

Details Deep optical imaging of nova remnants II. A southern-sky sample Deep optical imaging of nova remnants II. A southern-sky sample

1998-06-04

arxiv.org/abs/astro-ph/9806076v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication by MNRAS

Scientific paper

10.1046/j.1365-8711.1998.01899.x

We present an optical imaging study of 20 southern-sky nova remnants which has resulted in the discovery of four previously unknown nova shells -- V842 Cen, RR Cha, DY Pup and HS Pup. The study has also revealed previously unobserved features in three other known shells -- those of BT Mon, CP Pup and RR Pic. The images of BT Mon, V842 Cen, RR Cha, DY Pup and HS Pup have been processed using several deconvolution algorithms (Richardson-Lucy, maximum entropy and clean) in addition to straightforward point-source subtraction in an attempt to resolve the shells from the central stars. The use of four different methods enables us to make a qualitative judgement of the results. Notably, the shell of RR Pic displays tails extending outwards from clumps in the main ejecta similar to those previously detected in DQ Her.

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