# mass function

## mass function

1. The only information that can be determined about the masses m 1 and m 2 of the two components of a spectroscopic binary when the spectral lines of only one component (of mass m 1) can be observed. It is equal to
(m 2 3 sin3 i )/(m 1 + m 2 )2
where m 1 and m 2 are measured in solar masses and i is the inclination of the orbit.
2. (Salpeter mass function) See stellar mass.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
References in periodicals archive ?
The team then calculated the region's initial mass function based on 247 single stars with at least 15 times the Sun's mass.
The team used detailed analyses of about 250 stars with masses between 15 and 200 times the mass of our Sun to determine the distribution of massive stars born in 30 Doradus -- the so-called initial mass function (IMF).
The New Charged Nonsingular Black Hole Solution with a Nonlinear Mass Function
The probability mass functions in a giving interval are used to describe a discrete random variable, and the mean and covariance of the variable depend on the distribution law of each probability mass function.
Now, we introduce the generalized discrete probability distribution whose probability mass function is
Secondly, although the DS combination rule ensures the unity of mass function, the peremptory normalization limits the usage of the DS theory.
This paper focuses on contributing to the automatic detection of road elements based only on GPS data from a smartphone when driving and using the entire probability mass function from the sensed data as the input feature for classification.
A mass function is a mapping m from [2.sup.[THETA]] to [0,1], formally noted by
But Shannon entropy cannot be used directly in the framework of Dempster-Shafer evidence theory, because a mass function in evidence theory is a generalized probability assigned on the power set of the FOD.
Keeping the math at an algebra level, this handbook explains the probability mass function and distributional parameters for discrete uniform, binomial, multinomial, hypergeometric, geometric, negative binomial, and Poisson distributions.
Examples are the characteristics of the channel network on Mars [2], the relationship between solar flare occurrence and total flare energy [3], the correlation between a supermassive black hole mass and the host-galaxy bulge velocity dispersion ("M-sigma relation") [4], the distribution of initial masses for a population of stars ("initial mass function") [5], Kepler's third law, or the distribution of galaxies in the universe [6-8].
Finally, we construct Basic Belief Assignment (BBA, or called mass function) between evidence prototype EP and target classes c, which denotes m.

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