Radial velocities of HD 187399 = V1507 Cyg

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

HD 187399 is a spectral binary, containing a massive invisible component. Twelve spectrograms of HD 187399, obtained on the 6-meter telescope during 1982--1983, are analyzed. Radial velocities are measured for spectral lines of different elements. Balmer lines of hydrogen have a complex structure: they consist of absorption components of the B9 star and P Cyg-type profiles. As a whole, radial velocities, obtained from HeI, SiII, and MgII lines, follow the orbital curve derived by Merrill (1949).

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