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Brad Tucker |
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"Host Galaxy Environments
of Type Ia Supernova and Effects on Supernova Cosmology" |
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Uncertainty about the nature of dust in the host galaxies of type Ia supernovae (SNe Ia) is the largest source of systematic error affecting our understanding of the dark energy. Future high-density surveys, such as SkyMapper and Pan-STARRS, will have incomplete spectroscopic coverage for typing transient objects. We will need to use photometry of the host galaxies to measure redshifts and understand the constraints that samples of supernovae from different host galaxy types have on the dark energy. I will talk about current work aimed at characterizing these environments and ways to create priors based on the galaxy classifications in order to improve estimates of the dark energy equation of state. I will finish by updating on the Mt. Stromlo's new SkyMapper telescope. |