Infrared images, Virgo spirals, and the Tully-Fisher law

Details Infrared images, Virgo spirals, and the Tully-Fisher law Infrared images, Virgo spirals, and the Tully-Fisher law

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...382..382p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 382, Dec. 1, 1991, p. 382-395.

Astronomy and Astrophysics

Astrophysics

32

Infrared Imagery, Spiral Galaxies, Virgo Galactic Cluster, Astronomical Photometry, Galactic Rotation, Infrared Photometry, Magnitude

Scientific paper

For a complete (but magnitude-limited) sample of Virgo Cluster spiral galaxies, 1.65 micron photometry derived from images are presented. Both galaxy inclinations and H-magnitudes are derived from the new data. The new photometry agrees with previous measurements. The infrared inclinations from the present data are usable for galaxies having inclinations greater than 45 deg, but deeper images would be needed for galaxies more face-on than this. The inclinations are the major observational uncertainty in the Tully-Fisher relation, but the relation in Virgo must have an intrinsic dispersion amounting to about 0.4 mag. Sample selection is critical for determination of the intrinsic dispersion.

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