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Predicted Light Curves and Spectra
DD Mergers and SNe Ia: Predicted Light Curves and Spectra Wolfgang Hillebrandt (for Rüdiger Pakmor, Markus Kromer, et al.) MPI für Astrophysik Garching
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What started it (for us): The abundance tomography of SN 2005bl
(Hachinger et al. 2009)
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Are some of them (or all?) “super-Chandra” mergers and/or “sub-Chandra” detonations???
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The basic idea: The brightness of a SN Ia (the mass of radioactive 56Ni) may be a result of different white dwarf masses !
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So, let’s have a look at “mergers” …
(Pakmor et al. 2010)
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Density Temperature
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A detonation???
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A resolution effect???
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C O IME “Fe”
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Light curves ...
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… and spectra
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Changing the mass ratio …
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detonation unlikely!
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Summary and conclusions
Violent DD mergers are a robust explosion mechanism for SNe Ia (q ≥ 0.85) Faint explosions (91bg-like): M(Ni) ≈ Msun (for M(WD) ≤ 1 Msun ) Question: How frequent are more massive WD binaries?
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