期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 469, 期 2, 页码 2387-2400出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx1018
关键词
galaxies: fundamental parameters; galaxies: kinematics and dynamics; galaxies: photometry
资金
- CNES (Centre National d'Etudes Spatial - France)
- National Aeronautics and Space Administration
- National Aeronautics and Space Administration's Earth Science Technology Office, Computational Technologies Project [NCC5-626]
- DAGAL network from the People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme [PITNGA-2011-289313]
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 mu m) and of spatially resolved HI kinematics. We use these data together with three kinematic measures (W-50(i), V-max and V-flat) extracted from the global HI profiles or HI rotation curves, so as to construct 36 correlations allowing us to select the one with the least scatter. We introduce a tightness parameter sigma (perpendicular to). 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 mu m photometric band together with the V-flat parameter extracted from the HI rotation curve.
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