Measuring the Cosmic-Ray Acceleration Efficiency of a Supernova Remnant

被引：128

作者：

Helder, E. A. ^{[1
]}

Vink, J. ^{[1
]}

Bassa, C. G. ^{[2
,3
]}

Bamba, A. ^{[4
]}

Bleeker, J. A. M. ^{[1
,2
]}

Funk, S. ^{[5
]}

Ghavamian, P. ^{[6
]}

van der Heyden, K. J. ^{[7
]}

Verbunt, F. ^{[1
]}

Yamazaki, R. ^{[8
]}

机构：

[1] Univ Utrecht, Astron Inst, NL-3508 TA Utrecht, Netherlands

[2] SRON Netherlands Inst Space Res, NL-3584 CA Utrecht, Netherlands

[3] Radboud Univ Nijmegen, Dept Astrophys, NL-6525 ED Nijmegen, Netherlands

[4] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Dept High Energy Astrophys, Sagamihara, Kanagawa 2298510, Japan

[5] Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94025 USA

[6] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[7] Univ Cape Town, Dept Astron, ZA-7701 Rondebosch, South Africa

[8] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan

来源：

SCIENCE | 2009年 / 325卷 / 5941期

关键词：

DIFFUSIVE SHOCK ACCELERATION; BALMER-DOMINATED SHOCKS; RCW; 86; EMISSION; SPECTROSCOPY; TEMPERATURE; FILAMENTS; SPECTRA; MODEL; SHELL;

D O I：

10.1126/science.1173383

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：

Cosmic rays are the most energetic particles arriving at Earth. Although most of them are thought to be accelerated by supernova remnants, the details of the acceleration process and its efficiency are not well determined. Here we show that the pressure induced by cosmic rays exceeds the thermal pressure behind the northeast shock of the supernova remnant RCW 86, where the x-ray emission is dominated by synchrotron radiation from ultrarelativistic electrons. We determined the cosmic-ray content from the thermal Doppler broadening measured with optical spectroscopy, combined with a proper-motion study in x-rays. The measured postshock proton temperature, in combination with the shock velocity, does not agree with standard shock heating, implying that >50% of the postshock pressure is produced by cosmic rays.

引用

页码：719 / 722

页数：4

共 45 条

[11] Morphological evidence for azimuthal variations of the cosmic-ray ion acceleration at the blast wave of SN 1006 [J].

Cassam-Chenai, Gamil ;

Hughes, John P. ;

Reynoso, Estela M. ;

Badenes, Carles ;

Moffett, David .

ASTROPHYSICAL JOURNAL, 2008, 680 (02) :1180-1197

[12] BLAST WAVES WITH COSMIC-RAY PRESSURE [J].

CHEVALIER, RA .

ASTROPHYSICAL JOURNAL, 1983, 272 (02) :765-772

[13] OPTICAL-EMISSION FROM A FAST SHOCK-WAVE WITH APPLICATION TO SUPER-NOVA REMNANTS [J].

CHEVALIER, RA ;

KIRSHNER, RP ;

RAYMOND, JC .

ASTROPHYSICAL JOURNAL, 1980, 235 (01) :186-195

[14] Thermal X-ray emission and cosmic-ray production in young supernova remnants [J].

Decourchelle, A ;

Ellison, DC ;

Ballet, J .

ASTROPHYSICAL JOURNAL, 2000, 543 (01) :L57-L60

[15] On the plasma temperature in supernova remnants with cosmic-ray modified shocks [J].

Drury, L. O'C. ;

Aharonian, F. A. ;

Malyshev, D. ;

Gabici, S. .

ASTRONOMY & ASTROPHYSICS, 2009, 496 (01) :1-6

[16]

Drury LO, 1996, ASTRON ASTROPHYS, V309, P1002

[17] The evolution of supernovae in circumstellar wind-blown bubbles. I. Introduction and one-dimensional calculations [J].

Dwarkadas, VV .

ASTROPHYSICAL JOURNAL, 2005, 630 (02) :892-910

[18] Evidence for shock precursors in Tycho's supernova remnant [J].

Ghavamian, P ;

Raymond, J ;

Hartigan, P ;

Blair, WP .

ASTROPHYSICAL JOURNAL, 2000, 535 (01) :266-274

[19] Balmer-dominated spectra of nonradiative shocks in the Cygnus Loop, RCW 86, and Tycho supernova remnants [J].

Ghavamian, P ;

Raymond, J ;

Smith, RC ;

Hartigan, P .

ASTROPHYSICAL JOURNAL, 2001, 547 (02) :995-1009

[20] A physical relationship between electron-proton temperature equilibration and Mach number in fast collisionless shocks [J].

Ghavamian, Parviz ;

Laming, J. Martin ;

Rakowski, Cara E. .

ASTROPHYSICAL JOURNAL, 2007, 654 (01) :L69-L72

← 1 2 3 4 5 →