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Abundance Stratification in Type Ia Supernovae -- VIII. The 03fg-like SN\,2012dn: a double-degenerate merger interpretation
Charles J. Aouad, Paolo A. Mazzali, Stephan Hachinger +1
A detailed study using abundance tomography of SN 2012dn, a peculiar Type Ia supernova, is presented. Despite exhibiting a normal peak luminosity, it retains early-phase super-Chan…
On the Formation of the W-shaped O II Lines in Spectra of Type I Superluminous Supernovae
Sei Saito, Masaomi Tanaka, Paolo A. Mazzali +2
H-poor superluminous supernovae (SLSNe-I) are characterized by O II lines around 4,000 - 4,500 A in pre-/near-maximum spectra, so-called W-shaped O II lines. As these lines are fro…
Abundance stratification in type Ia supernovae -- VII. The peculiar, C-rich iPTF16abc: highlighting diversity among luminous events
Charles J. Aouad, Paolo A. Mazzali, Chris Ashall +2
Observations of Type Ia supernovae (SNe\,Ia) reveal diversity, even within assumed subcategories. Here, the composition of the peculiar iPTF16abc (SN\,2016bln) is derived by modeli…
Abundance stratification in type Ia supernovae -- VI: the peculiar slow decliner SN\,1999aa
Charles J. Aouad, Paolo A. Mazzali, Stephan Hachinger +6
The abundance distribution in the ejecta of the peculiar slowly declining Type Ia supernova (SN\,Ia) SN\,1999aa is obtained by modelling a time series of optical spectra. Similar t…
Carnegie Supernova Project-II: Near-infrared Spectroscopy of Stripped-Envelope Core-Collapse Supernovae
M. Shahbandeh, E. Y. Hsiao, C. Ashall +29
We present 75 near-infrared (NIR; 0.82.5 m) spectra of 34 stripped-envelope core-collapse supernovae (SESNe) obtained by the Carnegie Supernova Project-II (CSP-II), encompass…
How much H and He is "hidden" in SNe Ib/c? -- II. Intermediate-mass objects: a 22 M progenitor case study
Jacob Teffs, Thomas Ertl, Paolo Mazzali +2
Stripped envelope supernovae are a sub-class of core collapse supernovae showing several stages of H/He shell stripping that determines the class: H-free/He-poor SNe are classified…