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Detailed study of nearby SNIa. Stefano Benetti based on data from literature and. (astro-ph/0411059). Aim: understanding the diversity among “all normal” SNIa through a sample of best studied, archive and recent objects (26). SN 2003du. (Stanishev et al 2005). SN 2002er.

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Stefano benetti based on data from literature and

Detailed study of nearby SNIa

Stefano Benetti

based on data from literature and

(astro-ph/0411059)


Stefano benetti based on data from literature and

Aim:

understanding the diversity among “all normal” SNIa

through a sample of best studied, archive and recent objects (26)


Sn 2003du

SN 2003du

(Stanishev et al 2005)


Stefano benetti based on data from literature and

SN 2002er

(Pignata et al 2004)


Stefano benetti based on data from literature and

premax spectra

Profile and intensity of SiII 6355

Faint SiIII 4553-4568  cooler spectra

SN 1994D -8d (1.32)

structures  higher velocities

SN 2002bo -8d (1.13)

SN 1990N -8d (1.07)

SN 1998bu -7d (1.01)

structures in H&K absorption

(Benetti et al 2004)

Trento, September 2003


Stefano benetti based on data from literature and

SN 1994D -1d

(SiII)

SN 2002bo +0.1d

SN 1990N +1d

SN 1998bu -1d

at max ….

(Benetti et al 2004)

Trento, September 2003


Stefano benetti based on data from literature and

SN94D –8.5d

SN02bo –8.5d

SN99ee –9d

SN02bo +11.1d

SN99ee +8d

after max  more

homogeneous

SN02bo +29.4d

SN99ee +32d

intensity and shape of MgII line  premax inhomogeneity

IR

(Benetti et al 2004)


M 15 or siii

Hamuy et al. (1996)

m15(B)

Nugent et al. 95

Δm15 or (SiII)


Multidimensional

multidimensional

Hatano et al. 2000

t=10d


Stefano benetti based on data from literature and

1988


Stefano benetti based on data from literature and

an observer`s modern version

SiII


Some systematics come out

Some systematics come out


Stefano benetti based on data from literature and

-v/t ~ 60-70 km/s/d

Hierarchical cluster analysis


Stefano benetti based on data from literature and

blue and green same luminosity!

<MB> = -19.2 ± 0.3

<MB> = -19.3 ± 0.3

<MB> = -17.2 ± 0.6

Photometry:


Siii vs m 15

(SiII) vs. Δm15

red and blue form the Nugent’s relation?


Velocity gradient vs m 15

Velocity gradient vs. Δm15


Siii evolution

(SiII) evolution

greens show no evolution!


Sii expansion velocity

SII expansion velocity

(Benetti et al 2004)

Padova, June 2004


Stefano benetti based on data from literature and

SVG

(green)

2.5

HVG

(blue)

0.6

FAINT

(red)

-1.4

(~3-4!)


Summary

Summary

detailed observations  new clues for SNIa interpretation

velocity gradient is an important observational parameter

three families: green – blue (see also Wang et al 2004) - red

in average: green are +homogeneous, +young population, but same brightness of blue

Reasons ?? Different explosions; mixing; CSM-ejecta interaction?


Stefano benetti based on data from literature and

(Rescaled distance cluster)

Dendrogram:

the clustering


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