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Gaia Collaboration, Brown, A.G.A., Vallenari, A., Prusti, T., de Bruijne, J.H.J., Mignard, F., Drimmel, R., Babusiaux, C., Bailer-Jones, C.A.L., Bastian, U., et al. (2016) Gaia Data Release 1. Summary of the Astrometric, Photometric, and Survey Properties. Astronomy & Astrophysics, 595, A2.

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• TITLE: New Probability Distributions in Astrophysics: IX. Truncation for Exponential, Half Gaussian and Sech-Square Distributions with Application to the Galactic Height

  AUTHORS: Lorenzo Zaninetti

  KEYWORDS: Galaxy, Disk Galaxy, Fundamental Parameters Galaxy, Open Clusters and Associations

  JOURNAL NAME: International Journal of Astronomy and Astrophysics, Vol.12 No.4, November 10, 2022

  ABSTRACT: What distribution function best fits that of the stars’ heights above the Galactic plane? Can truncated distributions improve the fit? In order to answer the above questions, we derive the probability density function, the distribution function, the average value, the rth moment, the median, an expression to generate random variate and the maximum likelihood estimator, for the truncated exponential, truncated half-normal and the truncated sech-square distributions. The results are applied to the galactic height for open clusters and for Gaia’s stars in order to understand whether the truncated distributions are useful or not to astronomers.