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Type Ia Supernovae from Merging White Dwarfs II) Post-Merger Detonations
Cody Raskin, Daniel Kasen, Rainer Moll +2
Merging carbon-oxygen (CO) white dwarfs are a promising progenitor system for Type Ia supernovae (SN Ia), but the underlying physics and timing of the detonation are still debated.…
The Very Young Type Ia Supernova 2013dy: Discovery, and Strong Carbon Absorption in Early-Time Spectra
WeiKang Zheng, Jeffrey M. Silverman, Alexei V. Filippenko +20
The Type Ia supernova (SN Ia) 2013dy in NGC 7250 (d ~ 13.7 Mpc) was discovered by the Lick Observatory Supernova Search. Combined with a prediscovery detection by the Italian Super…
Rapidly Fading Supernovae from Massive Star Explosions
Io Kleiser, Daniel Kasen
Transient surveys have recently discovered a class of supernovae (SNe) with extremely rapidly declining light curves. These events are also often relatively faint, especially compa…
Nebular spectroscopy of the nearby type IIb supernova 2011dh
Isaac Shivvers, Paolo Mazzali, Jeffrey M. Silverman +6
We present nebular spectra of the nearby Type IIb supernova (SN) 2011dh taken between 201 and 678 days after core collapse. At these late times, SN 2011dh exhibits strong emission…
Tidal Tail Ejection as a Signature of Type~Ia Supernovae from White Dwarf Mergers
Cody Raskin, Daniel Kasen
The merger of two white dwarfs may be preceded by the ejection of some mass in "tidal tails", creating a circumstellar medium around the system. We consider the variety of observat…
Effect of a High Opacity on the Light Curves of Radioactively Powered Transients from Compact Object Mergers
Jennifer Barnes, Daniel Kasen
The coalescence of compact objects are a promising astrophysical sources of gravitational wave (GW) signals. The ejection of r-process material from such mergers may lead to a radi…