Abstract
In this paper, we investigate the statistical properties of the
Tully-Fisher relation (TFr) for a sample of 32 galaxies with measured
distances from the Cepheid period-luminosity relation and/or TRGB stars.
We take advantage of panchromatic photometry in 12 bands (from FUV to
4.5 μm) and of spatially resolved H I kinematics. We use these data
together with three kinematic measures (WI_{50},
Vmax and Vflat) extracted from the global H I
profiles or H I rotation curves, so as to construct 36 correlations
allowing us to select the one with the least scatter. We introduce a
tightness parameter σ⊥ of the TFr, in order to
obtain a slope-independent measure of the goodness of fit. We find that
the tightest correlation occurs when we select the 3.6 μm photometric
band together with the Vflat parameter extracted from the H I
rotation curve.
Original language | English |
---|---|
Pages (from-to) | 2387-2400 |
Number of pages | 14 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 469 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1-Aug-2017 |
Keywords
- galaxies: fundamental parameters
- galaxies: kinematics and dynamics
- galaxies: photometry
- SURFACE PHOTOMETRY
- DISTANCE SCALE
- URSA-MAJOR CLUSTER
- MORPHOLOGICAL TYPE DEPENDENCE
- STELLAR MASS DISTRIBUTIONS
- DECLINING ROTATION CURVES
- VELOCITY-WIDTH RELATION
- SPIRAL GALAXIES
- DWARF GALAXIES
- DARK-MATTER