Simultaneous spectroscopy and photometry of the non-synchronous rotator H2252-035

Details Simultaneous spectroscopy and photometry of the non-synchronous rotator H2252-035 Simultaneous spectroscopy and photometry of the non-synchronous rotator H2252-035

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.200..605w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 200, Aug. 1982, p. 605-619.

Astronomy and Astrophysics

Astronomy

17

Astronomical Models, Astronomical Photometry, Astronomical Spectroscopy, Binary Stars, Magnetic Stars, X Ray Sources, Emission Spectra, H Beta Line, H Gamma Line, Helium, Neutron Stars, Orbital Velocity, Periodic Variations, Radial Velocity, Radiant Flux Density, Spectral Line Width, Stellar Rotation, White Dwarf Stars

Scientific paper

Simultaneous spectroscopic and photometric observations of the nonsynchronous rotator H2252-035 are presented and interpreted in terms of two models that have been proposed for the system. Photometric observations show the presence of pulsations having a 859-sec period with a semiamplitude of 0.026 mag and a slower variation of the mean light level with a period of 3.59 hr and a semiamplitude of 0.05 mag. There is now evidence, however, of the 805-sec X-ray period. An orbital velocity of 60 km/s is estimated for the primary on the basis of the motion of the double peak structure. The emission lines H-beta, H-gamma, and He II 4086 show variations in line strength, although none of the correlations is with the X-ray period. It is concluded that H2252-035 can be interpreted as an asynchronous AM Herculis type binary containing a magnetic white dwarf, although the possibility that the compact object is a higher field neutron star cannot be excluded.

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