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J/MNRAS/414/1617    Classification of type Ia supernovae    (Arsenijevic, 2011)

A new insight into the classification of type Ia supernovae. Arsenijevic V. <Mon. Not. R. Astron. Soc., 414, 1617-1624 (2011)> =2011MNRAS.414.1617A
ADC_Keywords: Supernovae ; Morphology Keywords: supernovae: general - cosmology: observations Abstract: Type Ia supernovae (SNe Ia) spectra are compared using the coefficient of the largest wavelet scale in their decomposition. Two distinct subgroups have been identified, and their occurrence is discussed with regards to the use of SNe Ia as cosmological probes. Apart from the group of normal SNe, another trend characterized by intrinsically redder colours consists of many different SN events, which exhibit diverse properties. These include the interaction with the circumstellar material and the existence of a specific shell structure in or surrounding the SN ejecta or super-Chandrasekhar mass progenitors. Compared with normal objects, these SNe may violate the standard width-luminosity correction. This could influence the cosmological results if these are all calibrated equally, as their fraction among SNe Ia is not negligible when performing precision cosmology. Using the largest wavelet scale coefficient in combination with long-baseline B-I colours, we show how to disentangle the SN intrinsic colour from the part that corresponds to the reddening as a result of dust extinction in the host galaxy in the SALT2 colour parameter c. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 80 74 List of SNe Ia used in our study refs.dat 69 22 References
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 A6 --- SN SN name (NNNNaa) 8- 14 F7.4 --- z Redshift 16- 21 F6.3 --- x1 SALT2 light curve shape parameter x1 23- 27 F5.3 --- e_x1 rms uncertainty on x1 29- 34 F6.3 --- c SALT2 colour parameter (∼E(B-V)) (Guy et al., 2007A&A...466...11G) 36- 40 F5.3 --- e_c rms uncertainty on c 42- 47 F6.3 --- chi2 χ2/d.o.f. ratio 49- 54 F6.3 --- wlc15 Wavelet coefficient from scale 15 at central wavelength (1) 56- 60 F5.3 --- e_wlc15 rms uncertainty on wltcoeff15 62- 67 F6.3 --- wlc*15 Wavelet coefficient from scale 15 at central wavelength obtained in the interval [4000-6000Å] (1) 69- 73 F5.3 --- e_wlc*15 rms uncertainty on wlc*15 75- 80 A6 --- Ref References, in refs.dat file
Note (1): Wavelet coefficients from scale 15 at central wavelengths of the B and V bands on our spectra.
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Ref Reference number 4- 22 A19 --- BibCode BibCode 24- 43 A20 --- Aut Author's name 44- 69 A26 --- Com Comments
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Feb-2012
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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