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Three-dimensional distribution of ejecta in Supernova 1987A at 10 000 days
J. Larsson, C. Fransson, J. Spyromilio +19
Due to its proximity, SN 1987A offers a unique opportunity to directly observe the geometry of a stellar explosion as it unfolds. Here we present spectral and imaging observations…
Standardizing Type Ia supernovae using Near Infrared rebrightening time
Hikmatali Shariff, Suhail Dhawan, Xiyun Jiao +3
Accurate standardisation of Type Ia supernovae (SNIa) is instrumental to the usage of SNIa as distance indicators. We analyse a homogeneous sample of 22 low-z SNIa, observed by the…
Discovery of molecular hydrogen in SN 1987A
Claes Fransson, Josefin Larsson, Jason Spyromilio +3
Both CO and SiO have been observed at early and late phases in SN 1987A. H_2 was predicted to form at roughly the same time as these molecules, but was not detected at early epochs…
Light Curves of 213 Type Ia Supernovae from the ESSENCE Survey
Gautham Narayan, Armin Rest, Brad E. Tucker +34
The ESSENCE survey discovered 213 Type Ia supernovae at redshifts 0.1 < z < 0.81 between 2002 and 2008. We present their R and I-band photometry, measured from images obtained usin…
Applying the expanding photosphere and standardized candle methods to Type II-Plateau supernovae at cosmologically significant redshifts: the distance to SN 2013eq
E. E. E. Gall, R. Kotak, B. Leibundgut +3
Based on optical imaging and spectroscopy of the Type II-Plateau SN 2013eq, we present a comparative study of commonly used distance determination methods based on Type II supernov…
A reddening-free method to estimate the Ni mass of Type Ia supernovae
S. Dhawan, B. Leibundgut, J. Spyromilio +1
The increase in the number of Type Ia supernovae (SNe\,Ia) has demonstrated that the population shows larger diversity than has been assumed in the past. The reasons (e.g. parent p…