initial mass function

initial mass function
a relationship that specifies the mass distribution of a newly formed stellar population

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  • Initial mass function — The initial mass function (IMF) is an empirical function that describes the mass distribution (the histogram of stellar masses) of a population of stars in terms of their theoretical initial mass (the mass they were formed with). The properties… …   Wikipedia

  • Initial Mass Function — Die Ursprüngliche Massenfunktion, auch Anfängliche Massenfunktion, englisch Initial Mass Function IMF, beschreibt, wie in einer neu entstehenden Sternpopulation die Verteilung der Sternmassen aussieht. Edwin Salpeter leitete 1955 erstmals die… …   Deutsch Wikipedia

  • Mass function — may refer to: Initial mass function, a function that describes the mass distribution of a population of stars in terms of their initial mass Probability mass function, a function that gives the probability that a discrete random variable is… …   Wikipedia

  • Mass comparison — is a method developed by Joseph Greenberg to determine the level of genetic relatedness between languages. It is now usually called multilateral comparison. The method is generally rejected by linguists (Campbell 2001, p. 45), though it has… …   Wikipedia

  • Mass psychogenic illness — (MPI), also called mass sociogenic illness,[1] is “the rapid spread of illness signs and symptoms affecting members of a cohesive group, originating from a nervous system disturbance involving excitation, loss or alteration of function, whereby… …   Wikipedia

  • Mass finishing — is a group of manufacturing processes that allow large quantities of parts to be simultaneously finished. The goal of this type of finishing is to burnish, deburr, clean, radius, de flash, descale, remove rust, polish, brighten, surface harden,… …   Wikipedia

  • Mass spectrometry — (MS) is an analytical technique that measures the mass to charge ratio of charged particles.[1] It is used for determining masses of particles, for determining the elemental composition of a sample or molecule, and for elucidating the chemical… …   Wikipedia

  • mass production — the production or manufacture of goods in large quantities, esp. by machinery. [1915 20] * * * Application of the principles of specialization, division of labour, and standardization of parts to the manufacturing of goods on a large scale.… …   Universalium

  • mass spectrometry — or mass spectroscopy Analytic technique by which chemical substances are identified by sorting gaseous ions by mass using electric and magnetic fields. A mass spectrometer uses electrical means to detect the sorted ions, while a mass spectrograph …   Universalium

  • Mass noun — Not to be confused with Collective noun. Examples advice air art blood butter deodorant equipment food furniture garbage graffiti grass homework housework information …   Wikipedia

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