On the Scaling Relations of Disk Galaxies

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 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 vs. rotational velocity relations exhibit surprisingly low scatter. Practical recipes (and costs) to optimize the quality of template relations are considered.

8 pages with 4 figures

References in corpus (6)

• Forming Disk Galaxies in Lambda CDM Simulations
• The Arecibo Legacy Fast ALFA Survey: The Galaxy Population Detected by ALFALFA
• Scaling Relations of Spiral Galaxies
• A direct measurement of the baryonic mass function of galaxies & implications for the galactic baryon fraction
• Disk Galaxy Scaling Relations in the SFI++: Intrinsic Scatter and Applications
• The mid-infrared Tully-Fisher relation: Spitzer Surface Photometry

Cited by in corpus (1)

• A giant galaxy in the young Universe with a massive ring