Results from the Arecibo Galactic HI Survey (GALFA-HI)

Details Results from the Arecibo Galactic HI Survey (GALFA-HI) Results from the Arecibo Galactic HI Survey (GALFA-HI)

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21460005b&link_type=abstract

American Astronomical Society, AAS Meeting #214, #600.05

Astronomy and Astrophysics

Astronomy

Scientific paper

The consortium for Galactic studies with the Arecibo L-band Feed Array (ALFA) is conducting a neutral hydrogen survey of the whole Arecibo sky (declination range from -1 to 38 deg), over a velocity range of -700 to +700 km/s, with high angular (3.5 arcmin) and velocity resolution (0.2 km/s). We present highlights from TOGS (Turn On GALFA Survey), the largest portion of GALFA-HI, which is covering thousands of square degrees in commensal drift scan observations with the ALFALFA and AGES extragalactic ALFA surveys. The unprecedented resolution and sensitivity of our survey resulted in the detection of numerous isolated, ultra-compact HI clouds at low Galactic velocities, which are distinctly separated from the HI disk emission. We will discuss properties of this population, and their role in the interplay between the Galactic disk and halo.

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