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: 3 Search : low-mass
low-mass galaxy
  کهکشان ِ کم‌جرم   
kahkešân-e kamjerm

Fr.: galaxie de faible masse   

A galaxy with stellar masses ≤ 109 → solar masses (Dawn K. Erb, 2015, Nature, 9 July).

low; → mass; → galaxy.

low-mass star
  ستاره‌ی ِ کم‌جرم   
setâre-ye kamjerm (#)

Fr.: étoile de faible masse   

A star whose mass is around that of the Sun. See also: → intermediate-mass star; → high-mass star; → star formation.

low; → mass; → star.

low-mass X-ray binary (LMXB)
  درین ِ پرتو ایکس ِ کم‌جرم   
dorin-e partow-e iks-e kam-jerm

Fr.: binaire X de faible masse   

A member of one of the two main classes of → X-ray binary systems where one of the components is a → neutron star or → black hole and the other component a → low-mass star with a spectral type A or later. LMXBs mainly emit → soft X-rays. The ratio of their optical to X-ray luminosities is less than 0.1. They belong to → old stellar populations with ages 5-15 × 109 years and are found in → globular clusters and in the → bulge of our → Milky Way galaxy; some are also found in the disk. Hercules X-1 is an example of LMXBs.
See also: → high-mass X-ray binary.

low; → mass; → X-ray; → binary.