1. Type II Supernovae as Probes of Cosmology
- Author
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Poznanski, Dovi, Baron, Eddie, Blondin, Stephane, Bloom, Joshua S, D'Andrea, Christopher B, Valle, Massimo Della, Dessart, Luc, Ellis, Richard S, Gal-Yam, Avishay, Goobar, Ariel, Hamuy, Mario, Hicken, Malcolm, Kasen, Daniel N, Krisciunas, Kevin L, Leonard, Douglas C, Li, Weidong, Livio, Mario, Marion, Howie, Matheson, Thomas, Neill, James D, Nomoto, Ken'ichi, Nugent, Peter E, Quimby, Robert, Sako, Masao, Sullivan, Mark, Thomas, Rollin C, Turatto, Massimo, Dyk, Schuyler D Van, and Wood-Vasey, W Michael
- Subjects
astro-ph.CO - Abstract
- Constraining the cosmological parameters and understanding Dark Energy havetremendous implications for the nature of the Universe and its physical laws. - The pervasive limit of systematic uncertainties reached by cosmographybased on Cepheids and Type Ia supernovae (SNe Ia) warrants a search forcomplementary approaches. - Type II SNe have been shown to offer such a path. Their distances can bewell constrained by luminosity-based or geometric methods. Competing,complementary, and concerted efforts are underway, to explore and exploit thoseobjects that are extremely well matched to next generation facilities.Spectroscopic follow-up will be enabled by space- based and 20-40 meter classtelescopes. - Some systematic uncertainties of Type II SNe, such as reddening by dust andmetallicity effects, are bound to be different from those of SNe Ia. Theirstellar progenitors are known, promising better leverage on cosmic evolution.In addition, their rate - which closely tracks the ongoing star formation rate- is expected to rise significantly with look- back time, ensuring an adequatesupply of distant examples. - These data will competitively constrain the dark energy equation of state,allow the determination of the Hubble constant to 5%, and promote ourunderstanding of the processes involved in the last dramatic phases of massivestellar evolution.
- Published
- 2009