Abstract
We present new 21-cm neutral hydrogen (H i) observations of spiral galaxies for the 2MASS Tully–Fisher (2MTF) survey. Using the 64-m Parkes radio telescope multibeam system we obtain 152 high signal-to-noise ratio H i spectra from which we extract 148 high-accuracy (<5 per cent error) velocity widths and derive reliable rotation velocities. The observed sample consists of 303 southern (δ < −40°) galaxies selected from the 2MASS Redshift Survey with Ks < 11.25 mag, cz < 10 000 km s−1 and axis ratio b/a < 0.5. The H i observations reported in this paper will be combined with new H i spectra from the Green Bank and Arecibo telescopes, together producing the most uniform Tully–Fisher survey ever constructed (in terms of sky coverage). In particular, due to its near-infrared selection, 2MTF will be significantly more complete at low Galactic latitude (|b| < 15°) and will provide a more reliable map of peculiar velocities in the local Universe.
Original language | English |
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Pages (from-to) | 1178-1188 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 432 |
Issue number | 2 |
Early online date | 19 Apr 2013 |
DOIs | |
Publication status | Published - 2013 |
Keywords
- catalogues
- surveys
- galaxies: distances and redshifts
- galaxies: spiral
- radio lines: galaxies