The Cosmic Inflation Probe (CIP) - Updated

Details The Cosmic Inflation Probe (CIP) - Updated The Cosmic Inflation Probe (CIP) - Updated

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21348108m&link_type=abstract

American Astronomical Society, AAS Meeting #213, #481.08; Bulletin of the American Astronomical Society, Vol. 41, p.449

Astronomy and Astrophysics

Astrophysics

Scientific paper

The Cosmic Inflation Probe (CIP), earlier studied as an Origins Probe and later re-classified as a Beyond Einstein Inflation Probe, has been further defined as part of the Astrophysics Strategic Mission Concept Studies program. CIP's goal is to place significant constraints on Inflation models by measuring the shape of the primordial power spectrum to better than 1% through a space-based large-area galaxy survey in Hα between 1.8 and 5 microns capable of detecting >108 objects between a redshift of 1.7 and 6.5. As Inflation ends, the energy density declines, locking in the shape of the power spectrum of primordial density fluctuations. The shape of the potential that drove Inflation can be constrained by precise measurements of the spectral index (or tilt) and curvature (or running) of the power spectrum. This technique has been implemented with the cosmic microwave background (CMB) temperature fluctuations at large angular scales and with lower-z surveys such as the Sloan Digital Sky Survey (SDSS). Unfortunately, CMB missions cannot measure the power spectrum at small spatial scales, and the low-z galaxies sampled in the SDSS are too far from their primordial distribution to distinguish between most Inflation models. Combining CIP's unique capabilities at small spatial scales with CMB results at larger spatial scales, it is possible to directly measure the expansion history during Inflation over the broadest range which provides an even more powerful test of Inflation models than CIP or CMB measurements alone.
The updated CIP concept features a 1.5-meter passively-cooled telescope orbiting at L2. Two slitless grating spectrographs, each with a 3x3 mosiac array of Hawaii 2RG HgCdTe detectors, cover the 1.8-to-5 micron wavelength range. The poster will review CIP's scientific capabilities, illustrating both the mission's ability to constrain Inflation models and the great potential of the CIP survey for ancillary scientific investigations.

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