H II region abundances - Model oxygen line ratios
- S. McGaugh
- 1 October 1991
An extensive, homogeneous grid of H II region models, is presented. It is found that the behavior of the strong oxygen lines can be modeled by taking proper account of the softening of the ionizing…
SPARC: MASS MODELS FOR 175 DISK GALAXIES WITH SPITZER PHOTOMETRY AND ACCURATE ROTATION CURVES
We introduce SPARC (Spitzer Photometry and Accurate Rotation Curves): a sample of 175 nearby galaxies with new surface photometry at 3.6 μm and high-quality rotation curves from previous H i/Hα…
THE BARYONIC TULLY–FISHER RELATION OF GAS-RICH GALAXIES AS A TEST OF ΛCDM AND MOND
- S. McGaugh
- 14 July 2011
The baryonic Tully–Fisher relation (BTFR) is an empirical relation between baryonic mass and rotation velocity in disk galaxies. It provides tests of galaxy formation models in ΛCDM and of…
The Baryonic Tully-Fisher Relation
- S. McGaugh, J. Schombert, G. Bothun, W. D. de Blok
- PhysicsPublications Astronomical Society of Australia
- 1 December 1999
The Tully-Fisher relation appears fundamentally to be a relation between rotation velocity and total baryonic mass of the form Md~V4c.
The Baryonic Tully-Fisher Relation of Galaxies with Extended Rotation Curves and the Stellar Mass of Rotating Galaxies
- S. McGaugh
- 30 June 2005
I investigate the baryonic Tully-Fisher relation for a sample of galaxies with extended 21 cm rotation curves spanning the range 20 km s-1 ≲ Vf ≤ 300 km s-1. A variety of scalings of the stellar…
Radial Acceleration Relation in Rotationally Supported Galaxies.
A correlation between the radial acceleration traced by rotation curves and that predicted by the observed distribution of baryons is reported, tantamount to a natural law for rotating galaxies.
COLOR–MASS-TO-LIGHT-RATIO RELATIONS FOR DISK GALAXIES
We combine Spitzer 3.6 μm observations of a sample of disk galaxies spanning over 10 mag in luminosity with optical luminosities and colors to test population synthesis prescriptions for computing…
Modified Newtonian dynamics as an alternative to dark matter
▪ Abstract Modified Newtonian dynamics (MOND) is an empirically motivated modification of Newtonian gravity or inertia suggested by Milgrom as an alternative to cosmic dark matter. The basic idea is…
Modified Newtonian Dynamics (MOND): Observational Phenomenology and Relativistic Extensions
It is shown that many of these puzzling observations are predicted by one single relation — Milgrom’s law — involving an acceleration constant a0 on the order of the square-root of the cosmological constant in natural units.
High-Resolution Rotation Curves of Low Surface Brightness Galaxies. I. Data
We present long-slit Hα observations of 50 low surface brightness galaxies. Of these, 36 are of sufficient quality to form rotation curves. These data provide a large increase in the number of low…