mass function کریای ِ جرم karyâ-ye jerm Fr.: fonction de masse The number of a class of objects as a function of their mass.
→ initial mass function (IMF);
→ present-day mass function (PDMF).
A numerical relation between the masses of the two components of a
→ spectroscopic binary that provides information on the
relative masses of the two stars when the spectral lines of only one component can be
seen. If Mp is the mass of primary (whose spectrum is known),
Ms is the mass of secondary, and i the
→ angle of inclination of the orbit,
the mass function is given by:
(Ms3. sin3i) /
(Mp + Ms)2.
See also: → mass; → function. |
