An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 2 Search : spectroscopic binary
double-lined spectroscopic binary
  درین ِ دوخطه‌ی ِ بیناب‌نماییک   
dorin-e doxatte-ye binâbnemâyik

Fr.: binaire spectroscopique à double raies   

Same as → double-lined binary.

double; → line; → spectroscopic; → binary.

spectroscopic binary
  دُرین ِ بیناب‌نمایی   
dorin-e binâbnemâyi

Fr.: binaire spectroscopique   

A binary system that cannot be resolved by a telescope, but can be identified by means of the Doppler shift of the spectral lines. As stars revolve, they alternately approach and recede in the line of sight. This motion is shown up in their spectra as a periodic oscillation or doubling of spectral lines.

spectroscopic; → binary.