Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-08-16
Phys.Rev.D83:043004,2011
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
18 pages; 4 figures; 4 tables; replaced to match the accepted version
Scientific paper
10.1103/PhysRevD.83.043004
Upcoming imaging surveys such as the Large Synoptic Survey Telescope will repeatedly scan large areas of sky and have the potential to yield million-supernova catalogs. Type Ia supernovae are excellent standard candles and will provide distance measures that suffice to detect mean pairwise velocities of their host galaxies. We show that when combining these distance measures with photometric redshifts for either the supernovae or their host galaxies, the mean pairwise velocities of the host galaxies will provide a dark energy probe which is competitive with other widely discussed methods. Adding information from this test to type Ia supernova photometric luminosity distances from the same experiment, plus the cosmic microwave background power spectrum from the Planck satellite, improves the Dark Energy Task Force Figure of Merit by a factor of 1.8. Pairwise velocity measurements require no additional observational effort beyond that required to perform the traditional supernova luminosity distance test, but may provide complementary constraints on dark energy parameters and the nature of gravity. Incorporating additional spectroscopic redshift follow-up observations could provide important dark energy constraints from pairwise velocities alone. Mean pairwise velocities are much less sensitive to systematic redshift errors than the luminosity distance test or weak lensing techniques, and also are only mildly affected by systematic evolution of supernova luminosity.
Bhattacharya Suman
Kosowsky Arthur
Newman Jeffrey A.
Zentner Andrew R.
No associations
LandOfFree
Galaxy Peculiar Velocities From Large-Scale Supernova Surveys as a Dark Energy Probe 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 Galaxy Peculiar Velocities From Large-Scale Supernova Surveys as a Dark Energy Probe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Galaxy Peculiar Velocities From Large-Scale Supernova Surveys as a Dark Energy Probe will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-176436