A linear near-IR Tully-Fisher relation for giant and dwarf late-type galaxies

Details A linear near-IR Tully-Fisher relation for giant and dwarf late-type galaxies A linear near-IR Tully-Fisher relation for giant and dwarf late-type galaxies

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...343..751p&link_type=abstract

Astronomy and Astrophysics, v.343, p.751-759 (1999)

Astronomy and Astrophysics

Astrophysics

16

Galaxies: Distances And Redshifts, Galaxies: Fundamental Parameters, Galaxies: Irregular, Galaxies: Structure, Infrared: Galaxies

Scientific paper

We present the near-IR (K(') -band, i.e.: lambda = 2.1 ^mu m) Tully-Fisher (TF) relation for a sample of 50 giant and dwarf late-type galaxies, selected from the Virgo Cluster Catalogue. We find that L ~ VMax(4) along a range of 8 K(') -mag for galaxies with different Hubble types (from Sa to Im-BCD), phenomenologies, structures, star-formation histories, masses, dark-to-luminous mass ratios, metallicities and, perhaps, ages. The linearity of the near-IR TF relation is in contrast with recent determinations of the optical TF relations for samples of extreme late-type and dwarf galaxies. The near-IR TF law is in agreement both with the expectation from the Fundamental Plane for disk systems and with the scenario of self-regulating star-formation in disks. The previous results suggest that the TF relation reflects the connection between the structural/dynamical properties and the star-formation process of both giant and dwarf late-type galaxies, through a gas supply for star-formation regulated by the gravitational potential of the galaxy.

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