Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20911506v&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #115.06; Bulletin of the American Astronomical Society,
Astronomy and Astrophysics
Astronomy
Scientific paper
The 300-m diameter Arecibo radio observatory in Puerto Rico is the biggest dish in the world and since the installation of ALFA (the Arecibo L-Band Feed Array) it can look in seven different directions simultaneously. This makes it very well suited for finding new dim sources spread over the sky: distant dark galaxies or far-away radio pulsars for example. I will focus on the latter, discussing the results of the currently ongoing radio pulsar survey (many recycled and normal new radio pulsars, some in extremely relativistic orbits) and explaining what we can expect in the next two years -a thousand new pulsars and perhaps the first neutron star-black hole binary?
Evolving away from the single big dish concept, the Allen Telescope Array will combine 42-100 smaller dishes, with large beams on the sky and wide frequency coverage.
LOFAR is a low-frequency radio telescope of revolutionary design that is currently being constructed and will be operational in 2007. In stark contrast to radio dishes, LOFAR is the first telescope that relies on a central supercomputer to combine the signals of ten thousand individual dipoles to form several extremely sensitive, independently steerable beams on the sky. I will discuss the impact LOFAR will have on our research into the epoch of reionisation, transient sources, ultra high energy cosmic rays, deep extragalactic surveys and pulsars.
Finally I will discuss how the Square Kilometre Array will combine and super-size these three telescope approaches, promising to find all pulsars in the Galaxy, and more.
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1) Niels Stensen fellow. This work is supported through NSF grant AST-0507807
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