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arXiv 0801.4968astro-ph
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来自CFHT超新星遗产巡天的Ia型超新星速率和星系团

Type Ia Supernovae Rates and Galaxy Clustering from the CFHT Supernova Legacy Survey

M. L. Graham, C. J. Pritchet, M. Sullivan, S. D. J. Gwyn, J. D. Neill, E. Y. Hsiao, P. Astier, D. Balam, C. Balland, S. Basa, R. G. Carlberg, A. Conley, D. Fouc… 展开作者

M. L. Graham, C. J. Pritchet, M. Sullivan, S. D. J. Gwyn, J. D. Neill, E. Y. Hsiao, P. Astier, D. Balam, C. Balland, S. Basa, R. G. Carlberg, A. Conley, D. Fouchez, J. Guy, D. Hardin, I. M. Hook, D. A. Howell, R. Pain, K. Perrett, N. Regnault, S. Baumont, J. Le Du, C. Lidman, S. Perlmutter, P. Ripoche, N. Suzuki, E. S. Walker, T. Zhang

摘要:

加拿大-法国-夏威夷望远镜超新星遗产巡天(SNLS)建立了一个大型的中等红移(0.2 < z < 1.0)Ia型超新星(SNe Ia)同质数据库。SNLS团队已经证明了超新星Ia速率、性质和宿主星系恒星形成速率之间存在相关性。SNLS SN Ia数据库现在已经与光度红移星系目录和光学星系团目录相结合,以调查星系聚集对SN Ia速率的可能影响,超过预期的效果,由于SFR对聚集的依赖,通过形态-密度关系。我们确定了三个星系团SNe Ia,加上另外三个可能的星系团SNe Ia,并发现在中等红移的星系团中单位质量的SNe Ia率与场早型星系中单位质量的SNe Ia率和低红移星系团定向巡天的SNe Ia率是一致的。我们还发现,在集群环境中的SNe Ia的数量是在两个因素的预期从两个组件SNIa率模型。

英文摘要:

The Canada-France-Hawaii Telescope Supernova Legacy Survey (SNLS) has created a large homogeneous database of intermediate redshift (0.2 < z < 1.0) type Ia supernovae (SNe Ia). The SNLS team has shown that correlations exist between SN Ia rates, properties, and host galaxy star formation rates. The SNLS SN Ia database has now been combined with a photometric redshift galaxy catalog and an optical galaxy cluster catalog to investigate the possible influence of galaxy clustering on the SN Ia rate, over and above the expected effect due to the dependence of SFR on clustering through the morphology-density relation. We identify three cluster SNe Ia, plus three additional possible cluster SNe Ia, and find the SN Ia rate per unit mass in clusters at intermediate redshifts is consistent with the rate per unit mass in field early-type galaxies and the SN Ia cluster rate from low redshift cluster targeted surveys. We also find the number of SNe Ia in cluster environments to be within a factor of two of expectations from the two component SNIa rate model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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