Dark energy constraints from a space-based supernova survey

Details Dark energy constraints from a space-based supernova survey Dark energy constraints from a space-based supernova survey

2010-10-04

arxiv.org/abs/1010.0509v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

14 pages, 2 figures, accepted in A&A

Scientific paper

We present a forecast of dark energy constraints that could be obtained from a large sample of distances to Type Ia supernovae detected and measured from space. We simulate the supernova events as they would be observed by a EUCLID-like telescope with its two imagers, assuming those would be equipped with 4 visible and 3 near infrared swappable filters. We account for known systematic uncertainties affecting the cosmological constraints, including those arising through the training of the supernova model used to fit the supernovae light curves. Using conservative assumptions and Planck priors, we find that a 18 month survey would yield constraints on the dark energy equation of state comparable to the cosmic shear approach in EUCLID: a variable two-parameter equation of state can be constrained to ~0.03 at z~0.3. These constraints are derived from distances to about 13,000 supernovae out to z=1.5, observed in two cones of 10 and 50 deg^2. These constraints do not require measuring a nearby supernova sample from the ground. Provided swappable filters can be accommodated on EUCLID, distances to supernovae can be measured from space and contribute to obtain the most precise constraints on dark energy properties.

Affiliated with

Also associated with

No associations

Rating

Dark energy constraints from a space-based supernova survey does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dark energy constraints from a space-based supernova survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dark energy constraints from a space-based supernova survey will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-274158