2008/01/01 by Lorenzo Zaninetti · 16 citations
Mathematics · Physics and Astronomy · #Absolute magnitude #Astronomy and Astrophysical Research #Astrophysics #Diagram #Function (biology) #Galaxy #Gamma-ray bursts and supernovae #Hertzsprung–Russell diagram #Luminosity #Luminosity function #Mathematics #Physics #RADIUS #Stars #Statistics #Stellar evolution #Stellar, planetary, and galactic studies #White dwarf #astro-ph
paper · pdf · doi:10.2298/saj0877073z
published in Serbian Astronomical Journal (177), 73-85 (Astronomical Observatory, Department of Astronomy, Belgrade) · Pages 35, Figures 13
openalex publication_date 2008/01/01 · arxiv created 2008/11/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The absolute visual magnitude as function of the observed color (B-V), also named Hertzsprung-Russell diagram, can be described through five equations; that when calibrated stars are available means eight constants. The developed framework allows to deduce the remaining physical parameters, mass, radius and luminosity. This new technique is applied to the first 10 pc, the first 50 pc, the Hyades and to the determination of the distance of a cluster. The case of the white dwarfs is analyzed assuming the absence of calibrated data: our equation produces a smaller ?2 with respect to the standard color-magnitude calibration when applied to the Villanova Catalog of Spectroscopically Identified White Dwarfs. The theoretical basis of the formulas for the colors and the bolometric correction of the stars is clarified by a Taylor expansion in the temperature of the Planck distribution.