Statistics – Computation
Scientific paper
May 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...160..111g&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 160, no. 1, May 1986, p. 111-115.
Statistics
Computation
19
Astronomical Models, Galactic Evolution, Star Distribution, Stellar Luminosity, Stellar Magnitude, Computational Astrophysics, Distance, Hertzsprung-Russell Diagram, Mass To Light Ratios, Star Formation Rate, Supergiant Stars, Ultraviolet Spectra, Visible Spectrum
Scientific paper
This paper presents the results of theoretical simulations of the probability distribution of the absolute magnitude, in several photometric bands, of the three brightest objects in a population of massive area. Two UV bands, centered at 1400 and 1750 A, and the BV and V bands are considered. The experiments are performed for different choices of the Initial Mass Function (IMF) and for a constant Star Formation Rate. It is found that statistical effects are generally important in all the explored bands; the results in the UV bands are dependent on the IMF slope and on the adopted upper mass cut off, while in the optical bands the results are significantly less sensitive to these input parameters. Observations in different spectral bands of the brightest stars in large samples of galaxies, all at the same redshift, should minimize the statisical effects on the derived distance moduli.
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