Measuring Type Ia Supernova Distances and Redshifts From Their Multi-band Light Curves

Details Measuring Type Ia Supernova Distances and Redshifts From Their Multi-band Light Curves Measuring Type Ia Supernova Distances and Redshifts From Their Multi-band Light Curves

2007-08-21

arxiv.org/abs/0708.2745v1

Astropart.Phys.28:448-455,2007

Astronomy and Astrophysics

Astrophysics

16 pages, 4 figures, Astroparticle Physics, accepted

Scientific paper

10.1016/j.astropartphys.2007.08.

The distance and redshift of a type Ia supernova can be determined simultaneously through its multi-band light curves. This fact may be used for imaging surveys that discover and obtain photometry for large numbers of supernovae; so many that it would be difficult to obtain a spectroscopic redshift for each. Using available supernova-analysis tools we find that there are several conditions in which a viable distance-redshift can be determined. Uncertainties in the effective distance at z~0.3 are dominated by redshift uncertainties coupled with the steepness of the Hubble law. By z~0.5 the Hubble law flattens out and distance-modulus uncertainties dominate. Observations that give S/N=50 at peak brightness and a four-day observer cadence in each of griz-bands are necessary to match the intrinsic supernova magnitude dispersion out to z=1.0. Lower S/N can be tolerated with the addition of redshift priors (e.g. from a host-galaxy photometric redshift), observations in an additional redder band, or by focusing on supernova redshifts that have particular leverage for this measurement. More stringent S/N requirements are anticipated as improved systematics control over intrinsic color, metallicity, and dust is attempted to be drawn from light curves.

Affiliated with

Also associated with

No associations

Rating

Measuring Type Ia Supernova Distances and Redshifts From Their Multi-band Light Curves 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 Measuring Type Ia Supernova Distances and Redshifts From Their Multi-band Light Curves, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measuring Type Ia Supernova Distances and Redshifts From Their Multi-band Light Curves will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-366492