The Arecibo Legacy Fast ALFA Survey (ALFALFA)
An extragalactic survey for HI
Jamie Lomax '07
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| Jamie wishing she were back in Puerto Rico Photos of Jamie at Arecibo |
Abstract:
The Arecibo Legacy Fast ALFA (ALFALFA) Survey is a large-scale blind survey for extragalactic cold neutral hydrogen (HI) utilizing the Arecibo L-Band Feed Array (ALFA) instrument at the Arecibo Observatory. By observing the sky at radio wavelengths near 21 cm it is possible to find dense regions of HI that correspond to galaxies. I studied a 2.4 square degree region of sky centered on right ascension (celestial longitude) 11h48m and declination (celestial latitude) 13° contained in the ALFALFA data to determine the structure of galaxies contained in that section of sky with redshifts ranging from –1600 km/s to +18,000 km/s with 5 km/s resolution. I will discuss the structure of this region and the observing techniques used by the ALFALFA team in detail.
(Photos of Jamie's trip to Arecibo, November 2006)
For more information, contact Dr. Aileen O'Donoghue:
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| © | St. Lawrence University | Department of Physics |
| Revised: 07 Jul 2008 | Canton, NY 13617 |