Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-11-27
Astronomy and Astrophysics
Astrophysics
13 pages, 5 figures. AJ, accepted (scheduled for June 2008). v2 is as accepted by AJ and includes only minor textual changes f
Scientific paper
10.1088/0004-6256/135/5/1738
The 2 Micron All-Sky Survey (2MASS) Tully-Fisher Survey (2MTF) aims to measure Tully-Fisher (TF) distances to all bright inclined spirals in the 2MASS Redshift Survey (2MRS). Essential to this project is a universal calibration of the TF relation in the 2MASS J (1.2 um), H (1.6 um) and K (2.2 um) bands. We present the first bias corrected or universal TF template in these bands. We find that the slope of the TF relation becomes steeper as the wavelength increases being close to L \propto v^4 in K-band and L \propto v^3.6 in J and H-bands. We also investigate the dependence on galaxy morphology showing that in all three bands the relation is steeper for later type spirals which also have a dimmer TF zeropoint than earlier type spirals. We correct the final relation to that for Sc galaxies. Finally we study the scatter from the TF relation fitting for a width dependent intrinsic scatter which is not found to vary significantly with wavelength.
Huchra John P.
Masters Karen L.
Springob Christopher M.
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