Other
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.258..439r&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 258, no. 2, Sept. 15, 1992, p. 439-448. Research suppor
Other
16
Binary Stars, Line Spectra, Stellar Spectra, Variable Stars, X Ray Stars, Balmer Series, Helium, Hydrogen, Power Spectra, Stellar Orbits
Scientific paper
New spectroscopic observations of X Per, the optical counterpart of the steady, pulsating X-ray soruce 4U 0352 + 30, are presented, covering an interval of more than 2 years. The proposed orbital period of about 580 d, suggested by the regularity of the X-ray outbursts from this system, is not confirmed, although the observations show that the star is probably a velocity variable. The observations have been subjected to a period search procedure, showing that no other periods between 10-600 d are indicated. It is concluded that the amplitude of the orbital motion is too low to have been detected in this study. Results of line variation measurements are presented which show no obvious correlations with the fact that X Per underwent a transition from a Be- to a B-type spectrum during the course of this study.
Bell Aaron S.
Edwin R. P.
Hilditch Ron W.
Pollacco Don L.
Reynolds Alastair P.
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