An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

Homepage  Preliminaries  Abbreviations  Acknowledgments  References 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
present-day mass function (PDMF)
  کریای ِ جرم ِ کنونی، ~ ~ امروزی  
karyâ-ye jerm-e konuni, ~ ~ emruzi
Fr.: fonction de masse actuelle  

The present number of stars on the → main sequence per unit logarithmic mass interval per square parsec. The PDMF is the basis for deriving the → initial mass function (IMF).
This mass function is not corrected for stellar evolution nor losses through stellar deaths.

See also: → present; → day; → mass; → function.