Nonlinearity of the Tully-Fisher relation. [Dark matter in spiral galaxies]

Journal Article · Fri Dec 01 04:00:00 EST 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168101· OSTI ID:7058375

Mould, J; Han, M; Bothun, G ^[1]

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1. Palomar Observatory, Pasadena, CA (USA) Michigan Univ., Ann Arbor (USA)

Because the fraction of dark matter in spiral galaxies varies with luminosity, or for a number of other possible reasons, the relation between infrared luminosity and velocity width has previously been shown to be nonlinear. The relation between surface brightness and velocity width is now demonstrated to be nonlinear also. When these nonlinearities are taken into account, an apparent trend in surface brightness of cluster spirals with redshift is shown to be spurious. Apparent correlations of surface brightness and slope on cluster richness and cluster velocity dispersion also disappear. Neither this effect, nor an apparent trend in slope of the infrared Tully-Fisher relation with Hubble type, in themselves imply that the Tully-Fisher relation depends on the environment in which galaxies are located. 26 refs.

• OSTI ID: 7058375
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 347; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BRIGHTNESS
CONFIGURATION
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
GALAXIES
INFRARED RADIATION
LUMINOSITY
MASS
NONLINEAR PROBLEMS
NONLUMINOUS MATTER
OPTICAL PROPERTIES
PHOTOMETRY
PHYSICAL PROPERTIES
RADIATIONS
RED SHIFT
SPIRAL CONFIGURATION
VELOCITY