Evolution of Suprathermal Seed Particle and Solar Energetic Particle Abundances

被引：6

作者：

Mewaldt, R. A. ^{[1
]}

Mason, G. M. ^{[2
]}

Cohen, C. M. S. ^{[1
]}

Gomez-Herrero, R. ^{[3
]}

Haggerty, D. K. ^{[2
]}

Leske, R. A. ^{[1
]}

Wiedenbeck, M. E. ^{[4
]}

机构：

[1] CALTECH, Mail Code 290-17, Pasadena, CA 91125 USA

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

[3] Univ Kiel, Olshaussenstr 40, D-24118 Kiel, Germany

[4] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA

来源：

PHYSICS OF THE HELIOSPHERE: A 10 YEAR RETROSPECTIVE | 2012年 / 1436卷

关键词：

Solar energetic particles; solar wind; pickup ions; solar composition; solar flares; PICKUP IONS; ELEMENTAL ABUNDANCES; COSMIC-RAYS; ACCELERATION; HELIOSPHERE; POPULATION; EVENTS; TAIL; SUN;

D O I：

10.1063/1.4723609

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on a survey of the composition of solar-wind suprathermal tails and solar energetic particles (SEPs) including data from 1998 to 2010, with a focus on 2007 to 2010. The start of solar cycle 24 included several SEP events that were unusually He-poor. We conclude that these He-poor events are more likely related to Q/M-dependent spectral variations than to seed-particle composition changes. We also find that the quiet-time suprathermal Fe/O ratio during the 2008-2009 solar-minimum was dramatically lower (Fe/O <= 0.01) than earlier due in part to very low solar activity, but also suggesting contributions from an oxygen-rich source of suprathermal ions of unknown origin.

引用

页码：206 / 211

页数：6

共 37 条

[1] ENERGETIC NEUTRAL ATOMS: AN ADDITIONAL SOURCE FOR HELIOSPHERIC PICKUP IONS
Bochsler, Peter
Moebius, Eberhard
[J]. ASTROPHYSICAL JOURNAL LETTERS, 2010, 721 (01) : L6 - L9
[2] Are the sungrazing comets the inner source of pickup ions and energetic neutral atoms?
Bzowski, M
Królikowska, M
[J]. ASTRONOMY & ASTROPHYSICS, 2005, 435 (02) : 723 - 732
[3] Energetic particles from the outer heliosphere appearing as a secondary pick-up ion component
Chalov, SV
Fahr, HJ
[J]. ASTRONOMY & ASTROPHYSICS, 2003, 401 (01) : L1 - L4
[4] COMPOSITION AND SPECTRAL PROPERTIES OF THE 1 AU QUIET-TIME SUPRATHERMAL ION POPULATION DURING SOLAR CYCLE 23
Dayeh, M. A.
Desai, M. I.
Dwyer, J. R.
Rassoul, H. K.
Mason, G. M.
Mazur, J. E.
[J]. ASTROPHYSICAL JOURNAL, 2009, 693 (02) : 1588 - 1600
[5] Heavy-ion elemental abundances in large solar energetic particle events and their implications for the seed population
Desai, M. I.
Mason, G. M.
Gold, R. E.
Krimigis, S. M.
Cohen, C. M. S.
Mewaldt, R. A.
Mazur, J. E.
Dwyer, J. R.
[J]. ASTROPHYSICAL JOURNAL, 2006, 649 (01) : 470 - 489
[6] Solar cycle variations in the composition of the suprathermal heavy-ion population near 1 AU
Desai, M. I.
Mason, G. M.
Mazur, J. E.
Dwyer, J. R.
[J]. ASTROPHYSICAL JOURNAL, 2006, 645 (01) : L81 - L84
[7] Elemental abundances in the solar upper atmosphere derived by spectroscopic means
Feldman, U
Widing, KG
[J]. SPACE SCIENCE REVIEWS, 2003, 107 (3-4) : 665 - 720
[8] Feynman J., 2011, SOLAR PHYS IN PRESS
[9] C+ PICKUP IONS IN THE HELIOSPHERE AND THEIR ORIGIN
GEISS, J
GLOECKLER, G
FISK, LA
VONSTEIGER, R
[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1995, 100 (A12) : 23373 - 23377
[10] Interception of comet Hyakutake's ion tail at a distance of 500 million kilometres
Gloeckler, G
Geiss, J
Schwadron, NA
Fisk, LA
Zurbuchen, TH
Ipavich, FM
von Steiger, R
Balsiger, H
Wilken, B
[J]. NATURE, 2000, 404 (6778) : 576 - 578

← 1 2 3 4 →