Light curves of five type Ia supernovae at intermediate redshift

被引：24

作者：

Amanullah, R. ^{[1
]}

Stanishev, V. ^{[1
]}

Goobar, A. ^{[1
]}

Schahmaneche, K. ^{[2
,3
,4
]}

Astier, P. ^{[2
,3
,4
]}

Balland, C. ^{[2
,3
,4
,5
]}

Ellis, R. S. ^{[6
,7
]}

Fabbro, S. ^{[8
,9
]}

Hardin, D. ^{[2
,3
,4
]}

Hook, I. M.

Irwin, M. J. ^{[6
]}

McMahon, R. G. ^{[6
]}

Mendez, J. M. ^{[10
,11
]}

Mouchet, M. ^{[12
,13
]}

Pain, R. ^{[2
,3
,4
]}

Ruiz-Lapuente, P. ^{[10
]}

Walton, N. A. ^{[6
]}

机构：

[1] Univ Stockholm, Dept Phys, AlbaNova Univ Ctr, S-10691 Stockholm, Sweden

[2] CNRS, LPNHE, IN2P3, F-75252 Paris, France

[3] Univ Paris 06, F-75252 Paris, France

[4] Univ Paris 07, F-75252 Paris, France

[5] Univ Paris Sud, F-91405 Orsay, France

[6] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[7] CALTECH, Pasadena, CA 91125 USA

[8] IST, Ctr M Astrofis, CENTRA, Lisbon, Portugal

[9] IST, Dept Phys, Lisbon, Portugal

[10] Univ Barcelona, Dept Astron, E-08028 Barcelona, Spain

[11] Isaac Newton Grp Telescopes, Santa Cruz De La Palma 38700, Spain

[12] Univ Paris 07, Lab APC, F-75205 Paris 13, France

[13] Observ Paris, CNRS, LUTH, UMR 8102,Sect Meudon, F-92195 Meudon, France

来源：

ASTRONOMY & ASTROPHYSICS | 2008年 / 486卷 / 02期

基金：

英国科学技术设施理事会;

关键词：

cosmology : observations; cosmology : cosmological parameters; cosmology : distance scale; stars : supernovae : general;

D O I：

10.1051/0004-6361:20079070

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Aims. We present multi-band light curves and distances for five type Ia supernovae at intermediate redshifts, 0.18 < z < 0.27. Methods. Three telescopes on the Canary Island of La Palma, INT, NOT, and JKT, were used for discovery and follow-up of type Ia supernovae in the g' and r' filters. Supernova fluxes were measured by simultaneously fitting a supernova and host galaxy model to the data, and then calibrated using star catalogues from the Sloan Digital Sky Survey. Results. The light curve shape and colour corrected peak luminosities are consistent with the expectations of a flat Lambda CDM universe at the 1.5 sigma level. One supernova in the sample, SN1999dr, shows surprisingly large reddening, considering both that it is located at a significant distance from the core of its host (similar to 4 times the fitted exponential radius) and that the galaxy can be spectroscopically classified as early-type with no signs of ongoing star formation.

引用

页码：375 / U29

页数：11

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