A multi-wavelength study of the long-period AM HER system E2003+225. II - Changes in the accretion geometry

Details A multi-wavelength study of the long-period AM HER system E2003+225. II - Changes in the accretion geometry A multi-wavelength study of the long-period AM HER system E2003+225. II - Changes in the accretion geometry

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.221..839m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 221, Aug. 15, 1986, p. 839-856.

Astronomy and Astrophysics

Astronomy

28

Eclipsing Binary Stars, Stellar Mass Accretion, Ultraviolet Astronomy, Variable Stars, Astronomical Photometry, Emission Spectra, High Resolution, Iue, Line Spectra, Spaceborne Astronomy, Visible Spectrum

Scientific paper

The longest period AM Her system E2003+225 was observed on 1984 July 24 with IUE, with simultaneous optical spectroscopy and photometry from La Palma. The variations of the overall continuum from 1200 to 5000 Å with orbital phase allow a study of the different spectral components in the system. High-resolution optical spectra show complex line profiles containing broad and narrow components. The authors associate one narrow component with the heated surface of the secondary star, which has enabled them to estimate the parameters of the binary system. E2003+225 has revealed substantial changes compared with the earlier observations; in particular, the large (≡500 km s-1) γ velocity of Nousek et al. (1984) has decreased to now be consistent with zero velocity.

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