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Type Ia Supernovae from Merging White Dwarfs I. Prompt Detonations
Rainer Moll, Cody Raskin, Daniel Kasen +1
Merging white dwarfs are a possible progenitor of Type Ia supernovae (SNe Ia). While it is not entirely clear if and when an explosion is triggered in such systems, numerical model…
Two superluminous supernovae from the early universe discovered by the Supernova Legacy Survey
D. A. Howell, D. Kasen, C. Lidman +14
We present spectra and lightcurves of SNLS 06D4eu and SNLS 07D2bv, two hydrogen-free superluminous supernovae discovered by the Supernova Legacy Survey. At z = 1.588, SNLS 06D4eu i…
Confronting Simulations of Optically Thick Gas in Massive Halos with Observations at z=2-3
Michele Fumagalli, Joseph F. Hennawi, J. Xavier Prochaska +4
Cosmological hydrodynamic simulations predict the physical state of baryons in the circumgalactic medium (CGM), which can be directly tested via quasar absorption line observations…
Opacities and Spectra of the r-process Ejecta from Neutron Star Mergers
Daniel Kasen, N. R. Badnell, Jennifer Barnes
Material ejected during (or immediately following) the merger of two neutron stars may assemble into heavy elements by the r-process. The subsequent radioactive decay of the nuclei…