44Ti gamma-ray emission lines from SN1987A reveal an asymmetric explosion

被引：95

作者：

Boggs, S. E. ^{[1
]}

Harrison, F. A. ^{[2
]}

Miyasaka, H. ^{[2
]}

Grefenstette, B. W. ^{[2
]}

Zoglauer, A. ^{[1
]}

Fryer, C. L. ^{[3
]}

Reynolds, S. P. ^{[4
]}

Alexander, D. M. ^{[5
]}

An, H. ^{[6
]}

Barret, D. ^{[7
,8
]}

Christensen, F. E. ^{[9
]}

Craig, W. W. ^{[1
,10
]}

Forster, K. ^{[2
]}

Giommi, P. ^{[11
]}

Hailey, C. J. ^{[12
]}

Hornstrup, A. ^{[9
]}

Kitaguchi, T. ^{[13
]}

Koglin, J. E. ^{[14
]}

Madsen, K. K. ^{[2
]}

Mao, P. H. ^{[2
]}

Mori, K. ^{[12
]}

Perri, M. ^{[11
,15
]}

Pivovaroff, M. J. ^{[10
]}

Puccetti, S. ^{[11
,15
]}

Rana, V. ^{[2
]}

Stern, D. ^{[16
]}

Westergaard, N. J. ^{[9
]}

Zhang, W. W. ^{[17
]}

机构：

[1] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[2] CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 USA

[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[4] NC State Univ, Dept Phys, Raleigh, NC 27695 USA

[5] Univ Durham, Dept Phys, Durham DH1 3LE, England

[6] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[7] Univ Toulouse, UPS OMP, IRAP, Toulouse, France

[8] CNRS, Inst Rech Astrophys & Planetol, F-31028 Toulouse 4, France

[9] Tech Univ Denmark, Natl Space Inst, DTU Space, DK-2800 Lyngby, Denmark

[10] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[11] Agenzia Spaziale Italiana ASI Sci Data Ctr, I-00133 Rome, Italy

[12] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA

[13] RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan

[14] SLAC Natl Accelerator Lab, Kavli Inst Particle Astrophys & Cosmol, Menlo Pk, CA 94025 USA

[15] INAF Osservatorio Astron Roma, I-00040 Monte Porzio Catone, Italy

[16] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[17] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

SCIENCE | 2015年 / 348卷 / 6235期

基金：

美国国家航空航天局; 日本学术振兴会;

关键词：

CORE-COLLAPSE SUPERNOVAE; SN; 1987A; LIGHT-CURVE; CHANDRA OBSERVATIONS; NEUTRINO BURST; SN-1987A; EJECTA; PROFILES; SPECTRUM;

D O I：

10.1126/science.aaa2259

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In core-collapse supernovae, titanium-44 (Ti-44) is produced in the innermost ejecta, in the layer of material directly on top of the newly formed compact object. As such, it provides a direct probe of the supernova engine. Observations of supernova 1987A (SN1987A) have resolved the 67.87- and 78.32-kilo-electron volt emission lines from decay of Ti-44 produced in the supernova explosion. These lines are narrow and redshifted with a Doppler velocity of similar to 700 kilometers per second, direct evidence of large-scale asymmetry in the explosion.

引用

页码：670 / 671

页数：2

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