AAS 205th Meeting, 9-13 January 2005
Session 130 Astronomical Research with the Virtual Observatory
Special Session, Wednesday, January 12, 2005, 2:00-3:30pm, Royal Palm 1-3

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[130.08] A Digital Archive of Extragalactic HI Spectra and Access to the Arecibo Legacy Fast ALFA Survey

M.P. Haynes, R. Giovanelli, B.R. Kent, C.M. Springob, K.L. Masters, A. Saintonge, K. Spekkens, S. Stierwalt (Cornell U.)

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.

The author(s) of this abstract have provided an email address for comments about the abstract: haynes@astro.cornell.edu

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© 2004. The American Astronomical Society.