The Dark Ages Radio Explorer (DARE)

Details The Dark Ages Radio Explorer (DARE) The Dark Ages Radio Explorer (DARE)

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21710709b&link_type=abstract

American Astronomical Society, AAS Meeting #217, #107.09; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

"What were the first objects to light up the universe, and when did they do it"? (NRC, 2011). These are among the most fundamental questions in modern astrophysics and cosmology as articulated in the recent NRC report, New Worlds, New Horizons in Astronomy and Astrophysics. The Astro2010 Decadal Survey singles out this epoch as one of the top three science objectives for the coming decade. The birth of the first stars and black holes - the end of the Dark Ages or the "Cosmic Dawn” - is one of the truly transformative events in the history of the Universe. It provides the key connection between observations of the extraordinarily smooth Universe 400,000 years after the Big Bang seen via the Cosmic Microwave Background, and telescopic images that reveal the wealth of structures and galaxies seen today. Unfortunately, this epoch has remained tantalizingly out of reach for decades and its exploration requires fundamentally new techniques. With the Dark Ages Radio Explorer (DARE), we will investigate this early epoch of the Universe ( 80-350 million years after the Big Bang) for the first time using the sky-averaged, redshifted 21-cm Background (z=13-35) arising from the time when the first stars and black holes appeared in the Universe. DARE consists of a pair of tapered dipole antennas in lunar orbit operating in the shielded zone above the farside at 40-120 MHz. In this talk, we will discuss the science objectives and the instrument package for DARE.

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