Local host galaxy properties of type Ia supernovae from the Nearby SuperNovae Factory

M. Rigault (1) , Y. Copin (1) , G. Aldering , P. Antilogus (2) , C. Aragon , C. Baltay , S. Bongard (2) , C. Buton , A. Canto (2) , M. Childress , N. Chotard (1) , H. K. Fakhouri , E. Gangler (1) , E. Y. Hsiao , M. Kerschhaggl , M. Kowalski , S. Loken , P. Nugent , K. Paech , R. Pain (2) , E. Pecontal (3) , R. Pereira (1) , S. Perlmutter , D. Rabinowitz , K. Runge , R. Scalzo , G. Smadja (1) , C. Tao (4) , R. C. Thomas , B. A. Weaver , C. Wu (2)

1 IPNL - Institut de Physique Nucléaire de Lyon
2 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
3 CRAL - Centre de Recherche Astrophysique de Lyon
4 CPPM - Centre de Physique des Particules de Marseille

Type Ia supernovae are key tools to study accelerating expansion of the Universe. However despite active research, physics of such objects remain uncertain. To better understand potential systematics we investigate on local host galaxy properties. In this preliminary analysis, we find gas derived quantities such as metallicity and star formation rate compatible to those present in literature. Finally we show a relationship between SALT2 color and x_1 with star formation activity.

Mots clés: Observational cosmology; Type Ia supernovae; Host galaxy; Gas properties

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Cosmologie et astrophysique extra-galactique [astro-ph.CO]

M. Rigault, Y. Copin, G. Aldering, P. Antilogus, C. Aragon, et al.. Local host galaxy properties of type Ia supernovae from the Nearby SuperNovae Factory. Journées 2011 de la Société Française d'Astronomie & d'Astrophysique (SF2A), Jun 2011, Paris, France. pp.179-183. ⟨in2p3-00763308⟩