| Issue |
A&A
Volume 576, April 2015
|
|
|---|---|---|
| Article Number | A119 | |
| Number of page(s) | 24 | |
| Section | Catalogs and data | |
| DOI | https://doi.org/10.1051/0004-6361/201424709 | |
| Published online | 16 April 2015 | |
SALT observations of southern post-novae⋆,⋆⋆
Centre for Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland
e-mail: tomtom@astri.umk.pl
Received: 30 July 2014
Accepted: 15 January 2015
Aims. We report on recent optical observations of the stellar and the nebular remnants of 22 southern post-novae.
Methods. In this study, for each of our targets, we obtained and analysed long-slit spectra in the spectral range 3500–6600 Å and in Hα+[N ii] narrow-band images.
Results. The changes in the emission lines’ equivalent widths with the time since the outburst agree with earlier published results of other authors. We estimated an average value α = 2.37 for the exponent of the power law fitted to the post-novae continua. Our observations clearly show the two-component structure of the V842 Cen expanding nebulae, owing to the different velocities of the ejected matter. We discovered an expanding shell around V382 Vel with an outer diameter of about 12″.
Key words: novae, cataclysmic variables
The spectra as FITS files are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/576/A119
© ESO, 2015
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