Simultaneous infrared and optical observations of H2215 - 086

Details Simultaneous infrared and optical observations of H2215 - 086 Simultaneous infrared and optical observations of H2215 - 086

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.210p...1s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 210, Sept. 1, 1984, p. 1P-6P. Research supported by the

Astronomy and Astrophysics

Astronomy

24

Infrared Spectra, Stellar Spectrophotometry, Variable Stars, Visible Spectrum, Light Curve, Periodic Variations

Scientific paper

Simultaneous optical and infrared light curve observations of the 13th magnitude star associated with the HEAO-1 X-ray source H2215 - 086 were made with the 3.8 m United Kingdom Infrared Telescope on Hawaii with a two-channel near-infrared photometer which measured K and J bands, and a UBV optical photometer which monitored the V band. The observations at all three wavelengths, which were searched for periodicities using Fourier transform techniques, showed a spectrum very similar to those of AM Her type cataclysmic variables and variations with a period of 21 minutes and amplitude of 0.4 magnitude together with a slower variation of amplitude 0.3 magnitude and a period of 4.03 hours. A power spectrum of the data also showed a subsidiary peak indicating variability on a 23 minute period. Spectroscopic and photometric observations of H2215 086 indicate that the radial velocity curve could be fitted with either a 4.025 or 4.850 hour orbital period. It is concluded that H2215 - 086 is an intermediate polar (DQ Her) type cataclysmic variable; and the system distance is estimated to be greater than approximately 400 parsecs.

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