Determination of the hubble constant, the intrinsic scatter of luminosities of type Ia supernovae, and evidence for nonstandard dust in other galaxies
文献类型：期刊论文
| 作者 | Wang, Xiaofeng; Wang, Lifan; Pain, Reynald; Zhou, Xu ; Li, Zongwei
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| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2006-07-01 |
| 卷号 | 645期号:1页码:488-505 |
| 关键词 | cepheids cosmological parameters cosmology : observations distance scale dust, extinction supernovae : general |
| 英文摘要 | A sample of 109 Type Ia supernovae (SNe Ia) with recession velocity less than or similar to 30,000 km s(-1) is compiled from published SN Ia light curves to explore the expansion rate of the local universe. Based on the color parameter Delta C-12 and the decline rate Delta m(15), we found that the average absorption-to-reddening ratios for SN Ia host galaxies are R-UBVI = 4.37 +/- 0.25, 3.33 +/- 0.11, 2.30 +/- 0.11, and 1.18 +/- 0.11, which are systematically lower than the standard values in the Galaxy. We investigated the correlations of the intrinsic luminosity with light-curve decline rate, color index, and SN environmental parameters. In particular, we found that SNe Ia in E/S0 galaxies close to the central region are brighter than those in the outer region, which may suggest a possible metallicity effect on SN luminosity. The dependence of SN luminosity on galactic environment disappears after corrections for the extinction and Delta C-12. The Hubble diagrams constructed using 73 Hubble flow SNe Ia yield a 1 sigma scatter of less than or similar to 0.12 mag in BVI bands and similar to 0.16 mag in U band. The luminosity difference between normal SNe Ia and peculiar objects (including SN 1991bg-like and SN 1991T-like events) has now been reduced to within 0.15 mag via Delta C-12 correction. We use the same precepts to correct the nearby SNe Ia with Cepheid distances and found that the fully corrected absolute magnitudes of SNe Ia are M-B = -19.33 +/- 0.06 and M-V = -19.27 +/- 0.05. We deduced a value for the Hubble constant of H-0 = 72 +/- 6 (total) km s(-1) Mpc(-1). |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000238832900041 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7133]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China 2.Tsing Hua Univ, THCA, Beijing 100084, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 4.Univ Paris 06, Lab Phys Nucl & Hautes Energies, CNRS, IN2P3, Paris, France 5.Univ Paris 07, Lab Phys Nucl & Hautes Energies, CNRS, IN2P3, Paris, France 6.Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA 7.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Xiaofeng,Wang, Lifan,Pain, Reynald,et al. Determination of the hubble constant, the intrinsic scatter of luminosities of type Ia supernovae, and evidence for nonstandard dust in other galaxies[J]. ASTROPHYSICAL JOURNAL,2006,645(1):488-505. |
| APA | Wang, Xiaofeng,Wang, Lifan,Pain, Reynald,Zhou, Xu,&Li, Zongwei.(2006).Determination of the hubble constant, the intrinsic scatter of luminosities of type Ia supernovae, and evidence for nonstandard dust in other galaxies.ASTROPHYSICAL JOURNAL,645(1),488-505. |
| MLA | Wang, Xiaofeng,et al."Determination of the hubble constant, the intrinsic scatter of luminosities of type Ia supernovae, and evidence for nonstandard dust in other galaxies".ASTROPHYSICAL JOURNAL 645.1(2006):488-505. |
入库方式： OAI收割
来源：国家天文台
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