2012/08/01 by Riccardo Giovanelli · 2 citations
Engineering · Mathematics · Physics and Astronomy · #Astrophysics #Baryon #Engineering #Galaxies: Formation, Evolution, Phenomena #Galaxy #Geometry #Mathematics #Physics #Quality (philosophy) #Scaling #Scaling law #Scientific Research and Discoveries #Stars #Statistical physics #Stellar, planetary, and galactic studies #Task (project management) #astro-ph.CO
paper · pdf · doi:10.1017/s1743921312021588
published in Proceedings of the International Astronomical Union 8(S289), 296-303 (Cambridge University Press) · 8 pages with 4 figures
openalex publication_date 2012/08/01 · arxiv created 2013/04/01 · arxiv updated 2015/06/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract The physical background of scaling laws of disk galaxies is reviewed. The match between analytically derived and observed scaling laws is briefly discussed. Accurate modeling of the fraction of baryons that end up populating a disk, and the conversion efficiency of those into stars, remains a challenging task for numerical simulations. The measurement of rotational velocity tends to be made with criteria of convenience rather than through rigorous definition. And yet, the Tully–Fisher and the disk size versus rotational velocity relations exhibit surprisingly small scatter. Practical recipes (and costs) to optimize the quality of template relations are considered.