Timescale Stretch Parameterization of Type Ia Supernova B-band Light Curves.

Goldhaber, G. ; Groom, D. E. ; Kim, A. ; Aldering, G. ; Astier, P.

Technical Information Center Oak Ridge Tennessee

关键词: Supernovae;    Light curve;    Parameters;    Brightness;    Cosmology;   

RP-ID  :  DE2005836363

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

R-band intensity measurements along the light curve of Type Ia supernovae discovered by the Supernova Cosmology Project (SCP) are tted in brightness to templates allowing a free parameter the time-axis width factor w=s x (1 + z). The data points are then individually aligned in the time-axis, normalized and K-corrected back to the rest frame, after which the nearly 1300 normalized intensity measurements are found to lie on a well-determined common rest-frame B-band curve which we call the 'composite curve'.