Quantitative comparison between type Ia supernova spectra at low and high redshifts: A case study

G. Garavini; G. Folatelli; S. Nobili; G. Aldering; R. Amanullah; P. Antilogus; P. Astier; G. Blanc; J. Bronder; M. S. Burns; A. Conley; S. E. Deustua; M. Doi; S. Fabbro; V. Fadeyev; R. Gibbons; G. Goldhaber; A. Goobar; D. E. Groom; I. Hook; D. A. Howell; N. Kashikawa; A. G. Kim; M. Kowalski; N. Kuznetsova; B. C. Lee; C. Lidman; J. Mendez; T. Morokuma; K. Motohara; P. E. Nugent; R. Pain; S. Perlmutter; R. Quimby; J. Raux; N. Regnault; P. Ruiz-Lapuente; G. Sainton; K. Schahmaneche; E. Smith; A. L. Spadafora; V. Stanishev; R. C. Thomas; N. A. Walton; L. Wang; W. M. Wood-Vasey; N. Yasuda

HAL : in2p3-00142917, version 1

arXiv : astro-ph/0703629

Code Bibliographique ADS : 2007A&A...470..411G

DOI : 10.1051/0004-6361:20065400

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Astronomy and Astrophysics 470 (2007) 411-424

Quantitative comparison between type Ia supernova spectra at low and high redshifts: A case study

G. Garavini¹, G. Folatelli, S. Nobili, G. Aldering, R. Amanullah, P. Antilogus¹, P. Astier¹, G. Blanc², J. Bronder, M. S. Burns, A. Conley, S. E. Deustua, M. Doi, S. Fabbro, V. Fadeyev, R. Gibbons, G. Goldhaber, A. Goobar, D. E. Groom, I. Hook, D. A. Howell, N. Kashikawa, A. G. Kim, M. Kowalski, N. Kuznetsova, B. C. Lee, C. Lidman, J. Mendez, T. Morokuma, K. Motohara, P. E. Nugent, R. Pain¹, S. Perlmutter, R. Quimby, J. Raux¹, N. Regnault¹, P. Ruiz-Lapuente, G. Sainton¹, K. Schahmaneche¹, E. Smith, A. L. Spadafora, V. Stanishev, R. C. Thomas, N. A. Walton, L. Wang, W. M. Wood-Vasey, N. Yasuda

SUPERNOVAE Collaboration(s)

(2007)

We develop a method to measure the strength of the absorption features in Type Ia supernova (SN Ia) spectra and use it to make a quantitative comparison between the spectra of Type Ia supernovae at low and high redshifts. In this case study, we apply the method to 12 high-redshift (0.212 < z < 0.912) SNe Ia observed by the Supernova Cosmology Project . Through measurements of the strengths of these features and of the blueshift of the absorption minimum in Ca II H&K, we show that the spectra of the high-redshift SNe Ia are quantitatively similar to spectra of nearby SNe Ia (z < 0.15). One supernova in our high redshift sample, SN 2002fd at z=0.279, is found to have spectral characteristics that are associated with peculiar SN 1991T/SN 1999aa-like supernovae.

1 :	LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies

2 :	APC - AstroParticule et Cosmologie

équipe(s) de recherche : APC - Cosmologie et Gravitation

Thème(s)

Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique

Planète et Univers/Astrophysique

Mot(s)-clé(s) : Astrophysics

Lien vers le texte intégral :

http://fr.arXiv.org/abs/astro-ph/0703629


in2p3-00142917, version 1
http://hal.in2p3.fr/in2p3-00142917
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Contributeur : Dominique Girod <>
Soumis le : Lundi 23 Avril 2007, 15:56:06
Dernière modification le : Lundi 18 Juin 2012, 15:54:48