A SEARCH FOR NEW CANDIDATE SUPER-CHANDRASEKHAR-MASS TYPE Ia SUPERNOVAE IN THE NEARBY SUPERNOVA FACTORY DATA SET
文献类型：期刊论文
| 作者 | Scalzo, R.1; Aldering, G.2; Antilogus, P.3; Aragon, C.2; Bailey, S.2; Baltay, C.4; Bongard, S.3; Buton, C.5; Canto, A.3; Cellier-Holzem, F.3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2012-09-20 |
| 卷号 | 757期号:1 |
| 关键词 | supernovae: general supernovae: individual (SN 2003fg, SN 2007if, SN 2009dc, SNF 20080723-012) white dwarfs |
| 英文摘要 | We present optical photometry and spectroscopy of five Type Ia supernovae discovered by the Nearby Supernova Factory selected to be spectroscopic analogs of the candidate super-Chandrasekhar-mass events SN 2003fg and SN 2007if. Their spectra are characterized by hot, highly ionized photospheres near maximum light, for which SN 1991T supplies the best phase coverage among available close spectral templates. Like SN 2007if, these supernovae are overluminous (-19.5 < M-V < -20) and the velocity of the Si II lambda 6355 absorption minimum is consistent with being constant in time from phases as early as a week before, and up to two weeks after, B-band maximum light. We interpret the velocity plateaus as evidence for a reverse-shock shell in the ejecta formed by interaction at early times with a compact envelope of surrounding material, as might be expected for SNe resulting from the mergers of two white dwarfs. We use the bolometric light curves and line velocity evolution of these SNe to estimate important parameters of the progenitor systems, including Ni-56 mass, total progenitor mass, and masses of shells and surrounding carbon/oxygen envelopes. We find that the reconstructed total progenitor mass distribution of the events (including SN 2007if) is bounded from below by the Chandrasekhar mass, with SN 2007if being the most massive. We discuss the relationship of these events to the emerging class of super-Chandrasekhar-mass SNe Ia, estimate the relative rates, compare the mass distribution to that expected for double-degenerate SN Ia progenitors from population synthesis, and consider implications for future cosmological Hubble diagrams. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000309052800012 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6132]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.Australian Natl Univ, Mt Stromlo Observ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia 2.Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA 3.Univ Paris 07, Univ Paris 06, CNRS IN2P3, Lab Phys Nucl & Hautes Energies, F-75252 Paris 05, France 4.Yale Univ, Dept Phys, New Haven, CT 06250 USA 5.Univ Bonn, Inst Phys, D-53115 Bonn, Germany 6.Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA 7.Inst Phys Nucl, F-69622 Villeurbanne, France 8.Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Computat Res Div, Computat Cosmol Ctr, Berkeley, CA 94720 USA 9.Univ Lyon 1, Ctr Rech Astron Lyon, F-69561 St Genis Laval, France 10.Ctr Phys Particules Marseille, F-13288 Marseille 09, France |
| 推荐引用方式 GB/T 7714 | Scalzo, R.,Aldering, G.,Antilogus, P.,et al. A SEARCH FOR NEW CANDIDATE SUPER-CHANDRASEKHAR-MASS TYPE Ia SUPERNOVAE IN THE NEARBY SUPERNOVA FACTORY DATA SET[J]. ASTROPHYSICAL JOURNAL,2012,757(1). |
| APA | Scalzo, R..,Aldering, G..,Antilogus, P..,Aragon, C..,Bailey, S..,...&Nearby Supernova Factory.(2012).A SEARCH FOR NEW CANDIDATE SUPER-CHANDRASEKHAR-MASS TYPE Ia SUPERNOVAE IN THE NEARBY SUPERNOVA FACTORY DATA SET.ASTROPHYSICAL JOURNAL,757(1). |
| MLA | Scalzo, R.,et al."A SEARCH FOR NEW CANDIDATE SUPER-CHANDRASEKHAR-MASS TYPE Ia SUPERNOVAE IN THE NEARBY SUPERNOVA FACTORY DATA SET".ASTROPHYSICAL JOURNAL 757.1(2012). |
入库方式： OAI收割
来源：国家天文台
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