Identification of Lanning 90 as a previously uncataloged cataclysmic variable.
Abstract
Spectroscopic observations which reveal Lanning 90 to be a previously uncataloged cataclysmic variable are presented. Low-resolution spectra of the object display strong and broad emission lines of hydrogen and neutral helium superimposed on a continuum with roughly constant F-lambda. In addition to the Balmer and He I emision lines, the spectrum shows high excitation lines of He II, C II, C III, and N III. After a brief discussion of its general spectral character, it is argued that Lanning 90 is probably a nova-like variable. It is noted that the photometric and spectroscopic variability exhibited by the object is similar to the variability shown by the AM Herculis systems.
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- March 1983
- DOI:
- 10.1086/131146
- Bibcode:
- 1983PASP...95..206S
- Keywords:
-
- Abundance;
- Balmer Series;
- Emission Spectra;
- Stellar Spectrophotometry;
- Variable Stars;
- Carbon;
- Helium;
- Hydrogen;
- Nitrogen;
- Novae;
- Spectral Line Width;
- Spectral Resolution;
- Astronomy