Solar wind forcing at Mercury: WSA-ENLIL model results

被引：41

作者：

Baker, Daniel N. ^{[1
]}

Poh, Gangkai ^{[1
,2
]}

Odstrcil, Dusan ^{[3
,4
]}

Arge, C. Nick ^{[5
]}

Benna, Mehdi ^{[6
]}

Johnson, Catherine L. ^{[7
,8
]}

Korth, Haje ^{[9
]}

Gershman, Daniel J. ^{[2
]}

Ho, George C. ^{[9
]}

McClintock, William E. ^{[1
]}

Cassidy, Timothy A. ^{[1
]}

Merkel, Aimee ^{[1
]}

Raines, Jim M. ^{[2
]}

Schriver, David ^{[10
,11
]}

Slavin, James A. ^{[2
]}

Solomon, Sean C. ^{[12
,13
]}

Travnicek, Pavel M. ^{[14
]}

Winslow, Reka M. ^{[7
]}

Zurbuchen, Thomas H. ^{[2
]}

机构：

[1] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80303 USA

[2] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA

[3] George Mason Univ, Fairfax, VA 22030 USA

[4] NASA, Goddard Space Flight Ctr, Heliophys Sci Div, Greenbelt, MD 20771 USA

[5] USAF, Res Lab, Kirtland AFB, NM USA

[6] NASA, Goddard Space Flight Ctr, Solar Syst Explorat Div, Greenbelt, MD 20771 USA

[7] Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Vancouver, BC V5Z 1M9, Canada

[8] Planetary Sci Inst, Tucson, AZ USA

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

[10] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024 USA

[11] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA USA

[12] Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC USA

[13] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA

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

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2013年 / 118卷 / 01期

基金：

美国国家科学基金会;

关键词：

MESSENGER OBSERVATIONS; MAGNETIC-FIELD; CONE MODEL; INSTRUMENT; CME; INTERPLANETARY; SPECTROMETER; SUBSTORMS;

D O I：

10.1029/2012JA018064

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Analysis and interpretation of observations from the MESSENGER spacecraft in orbit about Mercury require knowledge of solar wind "forcing" parameters. We have utilized the Wang-Sheeley-Arge (WSA)-ENLIL solar wind modeling tool in order to calculate the values of interplanetary magnetic field (IMF) strength (B), solar wind velocity (V) and density (n), ram pressure (similar to nV(2)), cross-magnetosphere electric field (V x B), Alfven Mach number (M-A), and other derived quantities of relevance for solar wind-magnetosphere interactions. We have compared upstream MESSENGER IMF and solar wind measurements to see how well the ENLIL model results compare. Such parameters as solar wind dynamic pressure are key for determining the Mercury magnetopause standoff distance, for example. We also use the relatively high-time-resolution B-field data from MESSENGER to estimate the strength of the product of the solar wind speed and southward IMF strength (B-s) at Mercury. This product VBs is the electric field that drives many magnetospheric dynamical processes and can be compared with the occurrence of energetic particle bursts within the Mercury magnetosphere. This quantity also serves as input to the global magnetohydrodynamic and kinetic magnetosphere models that are being used to explore magnetospheric and exospheric processes at Mercury. Moreover, this modeling can help assess near-real-time magnetospheric behavior for MESSENGER or other mission analysis and/or ground-based observational campaigns. We demonstrate that this solar wind forcing tool is a crucial step toward bringing heliospheric science expertise to bear on planetary exploration programs. Citation: Baker, D. N., et al. (2013), Solar wind forcing at Mercury: WSA-ENLIL model results, J. Geophys. Res. Space Physics, 118, 45-57, doi:10.1029/2012JA018064.

引用

页码：45 / 57

页数：13

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