A spectrophotometric study of the eclipsing nova-like variable V 1315 Aquilae

Details A spectrophotometric study of the eclipsing nova-like variable V 1315 Aquilae A spectrophotometric study of the eclipsing nova-like variable V 1315 Aquilae

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.252..342d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 252, Oct. 1, 1991, p. 342-356.

Astronomy and Astrophysics

Astronomy

64

Cataclysmic Variables, Eclipsing Binary Stars, Stellar Spectrophotometry, Accretion Disks, Light Curve, Ubv Spectra

Scientific paper

Photometry and spectroscopy of V Aquilae are presented. The V-band light curves are found to exhibit deep symmetrical eclipses which recur with a period of 3.35 hr. The spectra are found to have narrow single-peaked Balmer and He I emission lines which, due to the absorption of low-velocity emission, exhibit a double-peaked structure near the inferior conjunction of the emission in the source. The lack of a primary eclipse in the Balmer and He I lines suggests a nondisk origin for the low-excitation lines. The high-excitation lines of He II 4686 A and C III/N III 4640-4650 A remain single-peaked at all phases and exhibit a deep primary eclipse, indicating an origin close to the white dwarf. Radial-velocity measurements show large phase shifts in both the low- and high-excitation lines, which is attributed to contaminating emission around phase 0.75. A number of models which have been proposed to explain these phenomena are reviewed. All but two of the proposed hypotheses - an accretion disk wind and an intermediate polar interpretation - are rejected.

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