Dr Zach Cano

 

 

 

Gamma-ray burst supernovae as standardizable candles

Cano (2014) ApJ, 794, 121

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Above figure from Cano (2014; ApJ, 794, 121).  The luminosity (k) and stretch (s) factors of eight GRB-SNe (not including the template SN 1998bw).

Top Panel: Combined data in rest-frame filters U (purple), B (blue), V (green), R (red) and I (brown) are shown.  The data were analysed with a linear-least squares method coupled with a Monte Carlo simulation to determine the slope and y-intercept, and their respective errors, of the fitted line.  The best-fitting parameters are m=1.60+-0.20 and b=-0.31+-0.15, where the quoted errors are 1-sigma, and are the standard deviations of each variable (see below).  Also plotted are the 2-sigma uncertainty limits of the fit (dashed lines).  The Pearson's correlation coefficient of the combined data is r=0.936, and the two-point probability of a chance correlation is p=4.2x10^-9, which indicates the potential use of GRB-SNe as standardizable candles.

Bottom Panels: the distribution of the fitted values of m (green) and b (blue).

The Observer's Guide to the Gamma-Ray Burst-Supernova Connection

Cano et al. (2016).

Accepted review in the special issue on "GRB in the Swift/Fermi Era and Beyond" published by Advances in Astronomy



A self-consistent analytical magnetar model: the luminosity of γ-ray burst supernovae is powered by radioactivity


Cano, Johansson & Maeda (2016)


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