Probing galaxy density profiles with future supernova surveys

TL;DR

This paper explores how future supernova surveys can be used to measure galaxy density profiles and the Hubble parameter by analyzing gravitational lensing effects in supernova observations.

Contribution

It proposes a novel method to constrain galaxy halo slopes and the Hubble parameter using data from upcoming supernova surveys like SNAP.

Findings

Supernova lensing can provide tight constraints on galaxy halo profiles.

Future surveys will detect multiply imaged supernovae useful for cosmological measurements.

The method offers an independent approach to traditional cosmological tests.

Abstract

In this paper we discuss the possibility to measure the Hubble parameter and the slope of galaxy density profiles using future supernova data. With future supernova surveys such as SNAP, large numbers of core collapse supernovae will be discovered, a small fraction of which will be multiply imaged. Measurements of the image separation, flux-ratio, time-delay and lensing foreground galaxy for these systems will provide tight constraints on the slope of galactic halos as well as providing complementary and independent information to other cosmological tests with respect to the Hubble parameter.