2008ApJ...687..456B

Query : 2008ApJ...687..456B

2008ApJ...687..456B - Astrophys. J., 687, 456-465 (2008/November-1)

Multilayered spectral formation in type Ia supernovae around maximum light.

BONGARD S., BARON E., SMADJA G., BRANCH D. and HAUSCHILDT P.H.

Abstract (from CDS):

We use the radiative transfer code PHOENIX to study the line formation of the wavelength region 5000-7000 Å. This is the region where the SN Ia-defining Si II feature occurs. This region is important, since the ratio of the two nearby silicon lines has been shown to correlate with the absolute blue magnitude. We use a grid of LTE synthetic spectral models to investigate the formation of line features in the spectra of SNe Ia. By isolating the main contributors to the spectral formation, we show that the ions that drive the spectral ratio are Fe III, Fe II, Si II, and S II. While the former two strongly dominate the flux transfer, the latter two form in the same physical region inside the supernova. We also show that the naive blackbody that one would derive from a fit to the observed spectrum is very different than the true underlying continuum.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Miscellaneous - Stars: Atmospheres - Stars: Supernovae: General

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SN 1991bg SN* 12 25 03.70 +12 52 15.6   14.75 14.3     SNIapec 612 1

Query : 2008ApJ...687..456B

Basic data :
SN 1991bg -- SuperNova
Other object types: otypes_help 		SN* (2012MNRAS,SN), V* (AAVSO), gB (GRB)
ICRS coord. (ep=J2000) : 		12 25 03.70 +12 52 15.6 [ 1000 1000 90 ] D 1991IAUC.5400....1K
FK4 coord. (ep=B1950 eq=1950) : 		12 22 31.54 +13 08 52.4 [ 1000 1000 90 ]
Gal coord. (ep=J2000) : 		278.22665 +74.46352 [ 1000 1000 90 ]
Radial velocity / Redshift / cz : 		V(km/s) 1256 [~] / z(~) 0.0042 [~] / cz 1259 [~]
   D 2003ApJ...594....1T
Spectral type: 		SNIapec C 2008yCat....1.2024B
Fluxes (2) :
B 14.75 [~] D 2008yCat.2283....0B
V 14.3 [~] E ~
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Hierarchy : number of linked objects
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Identifiers (3) :
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SN 1991bg GRB 911125 AAVSO 1220+13

References (612 between 1850 and 2026) (Total 612)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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