DO LEONIS: A NEW ECLIPSING CATACLYSMIC VARIABLE

• Published in: Publications of the Astronomical Society of the Pacific 1990-05, Vol.102 (651), p.558-564
• Main Authors: ABBOTT, T. M. C., SHAFTER, A. W., WOOD, J. H., TOMANEY, A. B., HASWELL, C. A.
• Format: Article
• Language: English
• Subjects: Astronomical photometry; Astronomy; BALMER LINES; Binary and multiple stars; BINARY STARS; BRIGHTNESS; Cataclysmic variables; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Companion stars; Earth, ocean, space; ECLIPSE; Eclipses; Eclipsing binaries; Emission spectra; ERUPTIVE VARIABLE STARS; Exact sciences and technology; Light curves; MEASURING INSTRUMENTS; NOVAE; Observational astronomy; Observatories; Optical filters; OPTICAL PROPERTIES; ORBITS; PHOTOMETERS; PHOTOMETRY; PHYSICAL PROPERTIES; SPECTRA; SPECTROSCOPY; STARS; Stellar spectra; VARIABLE STARS 640102 > Astrophysics & Cosmology-- Stars & Quasi-Stellar, Radio & X-Ray Sources; VISIBLE SPECTRA
• ISSN: 0004-6280; 1538-3873
• DOI: 10.1086/132669

Photometric and spectroscopic observations of DO Leo have been obtained using the McDonald Observatory high-speed CCD photometer and a conventional two-channel photoelectric photometer. The data reveal eclipses that are approximately 1ṃ5 deep. A total of nine eclipses were observed in February and March 1988 and in April 1989. These data were used to establish an orbital period of 0ḍ2345147(2). A low-resolution optical spectrum reveals significant He I λ orbital period is in excess of 5 hr, spectral features from the secondary star were not apparent in our data. Overall the spectrum is more characteristic of a novalike variable than of a dwarf nova.