THE MOST SLOWLY DECLINING TYPE Ia SUPERNOVA 2001ay
文献类型：期刊论文
| 作者 | Krisciunas, Kevin1; Li, Weidong2; Matheson, Thomas3; Howell, D. Andrew4,5; Stritzinger, Maximilian6,7; Aldering, Greg8; Berlind, Perry L.9; Calkins, M.9; Challis, Peter10; Chornock, Ryan10 |
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2011-09-01 |
| 卷号 | 142期号:3 |
| 关键词 | supernovae: individual (SN 2001ay) techniques: photometric techniques: spectroscopic |
| 英文摘要 | We present optical and near-infrared photometry, as well as ground-based optical spectra and Hubble Space Telescope ultraviolet spectra, of the Type Ia supernova (SN) 2001ay. At maximum light the Si II and Mg II lines indicated expansion velocities of 14,000 km s-(1), while Si III and S II showed velocities of 9000 km s(-1). There is also evidence for some unburned carbon at 12,000 km s(-1). SN 2001ay exhibited a decline-rate parameter of Delta m(15)(B) = 0.68 +/- 0.05 mag; this and the B-band photometry at t greater than or similar to + 25 day past maximum make it the most slowly declining Type Ia SN yet discovered. Three of the four super-Chandrasekhar-mass candidates have decline rates almost as slow as this. After correction for Galactic and host-galaxy extinction, SN 2001ay had M-B = -19.19 and M-V = -19.17 mag at maximum light; thus, it was not overluminous in optical bands. In near-infrared bands it was overluminous only at the 2 sigma level at most. For a rise time of 18 days (explosion to bolometric maximum) the implied Ni-56 yield was (0.58 +/- 0.15)/alpha M-circle dot, with alpha = L-max/E-Ni probably in the range 1.0-1.2. The Ni-56 yield is comparable to that of many Type Ia SNe. The "normal" Ni-56 yield and the typical peak optical brightness suggest that the very broad optical light curve is explained by the trapping of gamma rays in the inner regions. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000294669700008 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7900]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.Texas A&M Univ, Dept Phys & Astron, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA 2.Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA 3.Natl Opt Astron Observ, Tucson, AZ 85719 USA 4.Las Cumbres Observ Global Telescope Network, Goleta, CA 93117 USA 5.Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA 6.Stockholm Univ, Dept Astron, Oskar Klein Ctr, S-10691 Stockholm, Sweden 7.Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen O, Denmark 8.Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA 9.Fred L Whipple Observ, Amado, AZ 85645 USA 10.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA |
| 推荐引用方式 GB/T 7714 | Krisciunas, Kevin,Li, Weidong,Matheson, Thomas,et al. THE MOST SLOWLY DECLINING TYPE Ia SUPERNOVA 2001ay[J]. ASTRONOMICAL JOURNAL,2011,142(3). |
| APA | Krisciunas, Kevin.,Li, Weidong.,Matheson, Thomas.,Howell, D. Andrew.,Stritzinger, Maximilian.,...&Wang, Lifan.(2011).THE MOST SLOWLY DECLINING TYPE Ia SUPERNOVA 2001ay.ASTRONOMICAL JOURNAL,142(3). |
| MLA | Krisciunas, Kevin,et al."THE MOST SLOWLY DECLINING TYPE Ia SUPERNOVA 2001ay".ASTRONOMICAL JOURNAL 142.3(2011). |
入库方式： OAI收割
来源：国家天文台
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