中国科学院紫金山天文台机构知识库
Advanced  
PMO OpenIR  > 南极天文中心  > 期刊论文
题名: Keck and European southern observatory very large telescope view of the symmetry of the ejecta of the XRF/SN 2006aj
作者: Mazzali, Paolo A.; Foley, Ryan J.; Deng, Jinsong; Patat, Ferdinando; Pian, Elena; Baade, Dietrich; Bloom, Joshua S.; Filippenko, Alexei V.; Perley, Daniel A.; Valenti, Stefano; Wang LiFan(王力帆); Kawabata, Koji; Maeda, Keiichi; Nomoto, Ken-Ichi
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2007-06-01
卷号: 661, 期号:2, 页码:892-898
关键词: gamma rays : bursts ; nuclear reactions, nucleosynthesis, abundances ; supernovae : general ; supernovae : individual (SN 2006aj)
文章类型: Article
英文摘要: Nebular-phase spectra of SN 2006aj, discovered in coincidence with XRF 060218, were obtained with Keck in 2006 July and VLT in 2006 September. At the latter epoch spectropolarimetry was also attempted, yielding a polarization upper limit of similar to 2%. The spectra show strong [O I] and Mg I] emission lines, as expected in Type Ic supernovae, but weak Ca ii lines. The [ Fe ii] lines that were strong in SN 1998bw are much weaker in SN 2006aj, consistent with its lower luminosity. The outer velocity of the line-emitting region is similar to 8000 km s(-1) in July and similar to 7400 km s(-1) in September, consistent with the relatively low expansion kinetic energy of SN 2006aj. All lines have similar width, and their profiles indicate that no major asymmetries are present in the ejecta at velocities below v < 8000 km s(-1), except perhaps in the innermost part. The spectra were modeled with a non-LTE code. The mass of (56)Ni required to power the emission is similar to 0: 20 M(circle dot), confirming earlier results based on the light curve. The oxygen mass is similar to 1: 5 M(circle dot), again much less than in SN 1998bw, but similar to 0: 7 M(circle dot) larger than the value derived from the early-time modeling. The ejected mass below 8000 km s(-1) is similar to 2 M(circle dot), confirming that SN 2006aj was only about twice as massive and energetic as the normal Type Ic SN 1994I. The presence of a dense inner core, containing similar to 1 M(circle dot) of mostly oxygen and carbon, is inferred, as in all broad-lined SNe Ic. This core, which may be disklike, is too deep to influence the early light curve and too small to affect the late polarization spectrum.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: GAMMA-RAY BURST ; IC HYPERNOVA SN-2003DH/GRB-030329 ; LATE-TIME SPECTRA ; 25 APRIL 1998 ; SN 1998BW ; OFF-AXIS ; NEBULAR SPECTRA ; SUPERNOVA 2002AP ; CORE-COLLAPSE ; LIGHT CURVES
收录类别: SCI
语种: 英语
WOS记录号: WOS:000246947100022
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15883
Appears in Collections:南极天文中心_期刊论文

Files in This Item:

There are no files associated with this item.


作者单位: 1.Max Planck Inst Astrophys, D-85748 Garching, Germany
2.Natl Inst Astrophys, OATs, I-34143 Trieste, Italy
3.Univ Tokyo, Sch Sci, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan
4.Univ Tokyo, Sch Sci, Res Ctr Early Universe, Bunkyo Ku, Tokyo 1130033, Japan
5.Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
6.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
7.European So Observ, D-85748 Garching, Germany
8.Univ Ferrara, Dept Phys, I-44100 Ferrara, Italy
9.Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA
10.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
11.Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan
12.Univ Tokyo, Grad Sch Arts & Sci, Dept Earth Sci & Astron, Meguro Ku, Tokyo 1538892, Japan
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Mazzali, Paolo A.]'s Articles
[Foley, Ryan J.]'s Articles
[Deng, Jinsong]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Mazzali, Paolo A.]‘s Articles
[Foley, Ryan J.]‘s Articles
[Deng, Jinsong]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院紫金山天文台 - Feedback
Powered by CSpace