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2MTF I. The Tully-Fisher Relation in the 2MASS J, H and K Bands | | Karen L. Masters
; Christopher M. Springob
; John P. Huchra
; | | Date: |
27 Nov 2007 | | Abstract: | 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. | | Source: | arXiv, 0711.4305 | | Services: | Forum | Review | PDF | Favorites | |
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