2MTF II. New Parkes 21-cm observations of 303 southern galaxies
| Autor: | Hong, Tao, Staveley-Smith, Lister, Masters, Karen L., Springob, Christopher M., Macri, Lucas M., Koribalski, Barbel S., Jones, D. Heath, Jarrett, Tom H., Crook, Aidan C. |
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| Rok vydání: | 2013 |
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| Druh dokumentu: | Working Paper |
| DOI: | 10.1093/mnras/stt555 |
| Popis: | We present new 21-cm neutral hydrogen (HI) 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 HI spectra from which we extract 148 high-accuracy (< 5% error) velocity widths and derive reliable rotation velocities. The observed sample consists of 303 southern (\delta < -40\deg) galaxies selected from the MASS Redshift Survey (2MRS) with K_s <11.25 mag, cz < 10,000 km/s and axis ratio b/a < 0.5. The HI observations reported in this paper will be combined with new HI 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\deg) and will provide a more reliable map of peculiar velocities in the local universe. Comment: 11 pages, 12 figures, 3 tables, accepted for publication in MNRAS |
| Databáze: | arXiv |
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