Search for the Exit: Voyager 1 at Heliosphere's Border with the Galaxy

被引：185

作者：

Krimigis, S. M. ^{[1
,2
]}

Decker, R. B. ^{[1
]}

Roelof, E. C. ^{[1
]}

Hill, M. E. ^{[1
]}

Armstrong, T. P. ^{[3
]}

Gloeckler, G. ^{[4
]}

Hamilton, D. C. ^{[5
]}

Lanzerotti, L. J. ^{[6
]}

机构：

[1] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA

[2] Acad Athens, Off Space Res & Technol, Athens 10679, Greece

[3] Fundamental Technol LLC, Lawrence, KS 66046 USA

[4] Univ Michigan, Ann Arbor, MI 48109 USA

[5] Univ Maryland, College Pk, MD 20742 USA

[6] New Jersey Inst Technol, Newark, NJ 07102 USA

来源：

SCIENCE | 2013年 / 341卷 / 6142期

关键词：

TERMINATION SHOCK; COSMIC-RAYS; SOLAR-WIND; TRANSITION REGION; HELIOSHEATH; FLOW; ACCELERATION; INTENSITY; DISTANCE; VELOCITY;

D O I：

10.1126/science.1235721

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：

We report measurements of energetic (>40 kiloelectron volts) charged particles on Voyager 1 from the interface region between the heliosheath, dominated by heated solar plasma, and the local interstellar medium, which is expected to contain cold nonsolar plasma and the galactic magnetic field. Particles of solar origin at Voyager 1, located at 18.5 billion kilometers (123 astronomical units) from the Sun, decreased by a factor of >10(3) on 25 August 2012, while those of galactic origin (cosmic rays) increased by 9.3% at the same time. Intensity changes appeared first for particles moving in the azimuthal direction and were followed by those moving in the radial and antiradial directions with respect to the solar radius vector. This unexpected heliospheric "depletion region" may form part of the interface between solar plasma and the galaxy.

引用

页码：144 / 147

页数：5

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