Statistics – Applications
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20513008h&link_type=abstract
American Astronomical Society Meeting 205, #130.08; Bulletin of the American Astronomical Society, Vol. 36, p.1558
Statistics
Applications
Scientific paper
Global HI line spectra of galaxies provide redshifts, integrated line fluxes, and doppler-broadened line widths which in turn can be used to study large scale structure, comparative HI content, and disk rotation. The latter is especially useful for applications of the Tully-Fisher secondary distance method. We have constructed a digital archive of some 9000 galaxies observed by our group during the last 20 years with a variety of "big dishes", some of which are no longer in operation. Profile parameters have been extracted for all spectra in a homogeneous way (Springob et al. 2004). The digital spectra will be individually accessible through the NVO. We are expanding our NVO node to provide public access to data products associated with the Arecibo Legacy Fast ALFA (ALFALFA) Survey, proposed to begin in early 2005. ALFALFA will cover 7000 square degrees of the high galactic latitude sky visible from Arecibo with an rms sensitivity of 1.6 mJy/beam, 11 km/s resolution and an average 3.5 arcminute beam, over the velocity range from -2000 to +18000 km/s. ALFALFA will detect 16000 extragalactic HI line sources, including several hundred with HI masses less than 107.5 solar masses. Survey data products will include catalogs of both line and continuum source positions, fluxes, and other parameters, and tools will allow access to the catalogs, line profiles and the HI data cubes themselves. This work is partially supported by NSF grants AST-0307396, AST-0307661 and the NRAO/GBT 03B-007 Graduate Student Support Grant.
Giovanelli Riccardo
Haynes Martha P.
Kent Brian R.
Masters Karen L.
Saintonge Amelie
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