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Use of incident and reflected solar particle beams to trace the topology of magnetic clouds

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Use of incident and reflected solar particle beams to trace the topology of magnetic clouds. / Tan, Lun C.; Malandraki, Olga E.; Reames, Donald V. et al.
In: The Astrophysical Journal, Vol. 750, No. 2, 146, 10.05.2012.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Tan, LC, Malandraki, OE, Reames, DV, Ng, CK, Wang, L & Dorrian, G 2012, 'Use of incident and reflected solar particle beams to trace the topology of magnetic clouds', The Astrophysical Journal, vol. 750, no. 2, 146. https://doi.org/10.1088/0004-637X/750/2/146

APA

Tan, L. C., Malandraki, O. E., Reames, D. V., Ng, C. K., Wang, L., & Dorrian, G. (2012). Use of incident and reflected solar particle beams to trace the topology of magnetic clouds. The Astrophysical Journal, 750(2), Article 146. https://doi.org/10.1088/0004-637X/750/2/146

Vancouver

Tan LC, Malandraki OE, Reames DV, Ng CK, Wang L, Dorrian G. Use of incident and reflected solar particle beams to trace the topology of magnetic clouds. The Astrophysical Journal. 2012 May 10;750(2):146. doi: 10.1088/0004-637X/750/2/146

Author

Tan, Lun C. ; Malandraki, Olga E. ; Reames, Donald V. et al. / Use of incident and reflected solar particle beams to trace the topology of magnetic clouds. In: The Astrophysical Journal. 2012 ; Vol. 750, No. 2.

Bibtex

@article{69a4cc7a6be64daca0f4921bde7629e4,
title = "Use of incident and reflected solar particle beams to trace the topology of magnetic clouds",
abstract = "Occasionally, large solar energetic particle (SEP) events occur inside magnetic clouds (MCs). In this work, the onset time analysis, the peak intensity analysis, and the decay phase analysis of SEPs are used to investigate two large SEP events inside MCs: the 1998 May 2 and 2002 April 21 events. The onset time analysis of non-relativistic electrons and similar to MeV nucleon(-1) heavy ions shows the stability of the magnetic loop structure during a period of a few hours in the events examined. The joint analysis of pitch-angle distributions and peak intensities of electrons exhibits that, depending on the particle pitch angle observed at 1 AU, in the April event the reflection point of particles may be distributed along a wide spatial range, implying that the magnetic loop is a magnetic bottle connected to the Sun with both legs. In contrast, in the May event particle reflection occurs abruptly at the magnetic mirror formed by a compressed field enhancement behind the interplanetary shock, consistent with its open field line topology.",
keywords = "Sun: heliosphere, ELECTRON EVENTS, FIELD LINES, CORONAL MASS EJECTION, SHOCK, WIND SPACECRAFT, ACCELERATION, TRANSPORT, DISTRIBUTIONS, Sun: magnetic topology, ENERGETIC PARTICLES, PITCH-ANGLE, Sun: coronal mass ejections (CMEs), Sun: particle emission",
author = "Tan, {Lun C.} and Malandraki, {Olga E.} and Reames, {Donald V.} and Ng, {Chee K.} and Linghua Wang and Gareth Dorrian",
year = "2012",
month = may,
day = "10",
doi = "10.1088/0004-637X/750/2/146",
language = "English",
volume = "750",
journal = "The Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing",
number = "2",

}

RIS

TY - JOUR

T1 - Use of incident and reflected solar particle beams to trace the topology of magnetic clouds

AU - Tan, Lun C.

AU - Malandraki, Olga E.

AU - Reames, Donald V.

AU - Ng, Chee K.

AU - Wang, Linghua

AU - Dorrian, Gareth

PY - 2012/5/10

Y1 - 2012/5/10

N2 - Occasionally, large solar energetic particle (SEP) events occur inside magnetic clouds (MCs). In this work, the onset time analysis, the peak intensity analysis, and the decay phase analysis of SEPs are used to investigate two large SEP events inside MCs: the 1998 May 2 and 2002 April 21 events. The onset time analysis of non-relativistic electrons and similar to MeV nucleon(-1) heavy ions shows the stability of the magnetic loop structure during a period of a few hours in the events examined. The joint analysis of pitch-angle distributions and peak intensities of electrons exhibits that, depending on the particle pitch angle observed at 1 AU, in the April event the reflection point of particles may be distributed along a wide spatial range, implying that the magnetic loop is a magnetic bottle connected to the Sun with both legs. In contrast, in the May event particle reflection occurs abruptly at the magnetic mirror formed by a compressed field enhancement behind the interplanetary shock, consistent with its open field line topology.

AB - Occasionally, large solar energetic particle (SEP) events occur inside magnetic clouds (MCs). In this work, the onset time analysis, the peak intensity analysis, and the decay phase analysis of SEPs are used to investigate two large SEP events inside MCs: the 1998 May 2 and 2002 April 21 events. The onset time analysis of non-relativistic electrons and similar to MeV nucleon(-1) heavy ions shows the stability of the magnetic loop structure during a period of a few hours in the events examined. The joint analysis of pitch-angle distributions and peak intensities of electrons exhibits that, depending on the particle pitch angle observed at 1 AU, in the April event the reflection point of particles may be distributed along a wide spatial range, implying that the magnetic loop is a magnetic bottle connected to the Sun with both legs. In contrast, in the May event particle reflection occurs abruptly at the magnetic mirror formed by a compressed field enhancement behind the interplanetary shock, consistent with its open field line topology.

KW - Sun: heliosphere

KW - ELECTRON EVENTS

KW - FIELD LINES

KW - CORONAL MASS EJECTION

KW - SHOCK

KW - WIND SPACECRAFT

KW - ACCELERATION

KW - TRANSPORT

KW - DISTRIBUTIONS

KW - Sun: magnetic topology

KW - ENERGETIC PARTICLES

KW - PITCH-ANGLE

KW - Sun: coronal mass ejections (CMEs)

KW - Sun: particle emission

U2 - 10.1088/0004-637X/750/2/146

DO - 10.1088/0004-637X/750/2/146

M3 - Journal article

VL - 750

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 146

ER -