MESSENGER Observations of the Composition of Mercury's Ionized Exosphere and Plasma Environment

@article{Zurbuchen2008MESSENGEROO,
  title={MESSENGER Observations of the Composition of Mercury's Ionized Exosphere and Plasma Environment},
  author={Thomas H. Zurbuchen and Jim M. Raines and George Gloeckler and Stamatios M. Krimigis and James A. Slavin and Patrick L. Koehn and Rosemary Margaret Killen and Ann L. Sprague and Ralph L. McNutt and Sean C. Solomon},
  journal={Science},
  year={2008},
  volume={321},
  pages={90 - 92}
}
The region around Mercury is filled with ions that originate from interactions of the solar wind with Mercury's space environment and through ionization of its exosphere. The MESSENGER spacecraft's observations of Mercury's ionized exosphere during its first flyby yielded Na+, O+, and K+ abundances, consistent with expectations from observations of neutral species. There are increases in ions at a mass per charge (m/q) = 32 to 35, which we interpret to be S+ and H2S+, with (S+ + H2S+)/(Na+ + Mg… Expand
MESSENGER Investigations of the Plasma Environment at Mercury.
The region around Mercury is filled with ions that originate from interactions of the solar wind with Mercury’s space environment and through ionization of its exosphere. The MESSENGER spacecraft’sExpand
MESSENGER Observations of the Spatial Distribution of Planetary Ions Near Mercury
TLDR
Global measurements by MESSENGER of the fluxes of heavy ions at Mercury, particularly sodium (Na+) and oxygen (O+), exhibit distinct maxima in the northern magnetic-cusp region, indicating that polar regions are important sources of Mercury's ionized exosphere, presumably through solar-wind sputtering near the poles. Expand
Heavy Ion Composition of Mercury's Magnetosphere
We modeled the exospheric densities for sputtering and thermal desorption in detail for the time period of the first MESSENGER flyby of Mercury. From the exospheric densities we calculate ionExpand
MESSENGER observations of multiscale Kelvin‐Helmholtz vortices at Mercury
Observations by the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft in Mercury's magnetotail demonstrate for the first time that Na+ ions exert a dynamicExpand
Distribution and compositional variations of plasma ions in Mercury's space environment: The first three Mercury years of MESSENGER observations
[1] We have analyzed measurements of planetary ions near Mercury made by the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) Fast Imaging Plasma Spectrometer (FIPS) over theExpand
The sodium exosphere of Mercury: Comparison between observations during Mercury's transit and model results
Abstract In this study we compare the sodium exosphere observations made by Schleicher et al. [Schleicher, H., and 4 colleagues, 2004. Astron. Astrophys. 425, 1119–1124] with the result of a detailedExpand
Seasonal Variations of Mercury's Magnesium Dayside Exosphere from MESSENGER Observations
Abstract The Ultraviolet and Visible Spectrometer channel of the Mercury Atmospheric and Surface Composition Spectrometer instrument aboard the MErcury Surface, Space ENvironment, GEochemistry, andExpand
MESSENGER observations of the plasma environment near Mercury
Abstract The MESSENGER Fast Imaging Plasma Spectrometer (FIPS) measured the bulk plasma characteristics of Mercury's magnetosphere and solar wind environment during the spacecraft's first two flybysExpand
Observations of Interstellar Helium Pickup Ions in the Inner Heliosphere
During the MESSENGER spacecraft's interplanetary trajectory to Mercury, the Fast Imaging Plasma Spectrometer (FIPS) measured the first helium pickup ion distributions at a heliocentric distance (R)Expand
Quasi‐trapped ion and electron populations at Mercury
[1] Mariner 10 and MESSENGER spacecraft observations have established that Mercury has an intrinsic magnetic field and magnetosphere. Following the March 2011 insertion of MESSENGER into orbit aroundExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 17 REFERENCES
A quantitative model of the planetary Na + contribution to Mercury’s magnetosphere
Abstract. We examine the circulation of heavy ions of planetary origin within Mercury’s magnetosphere. Using single particle trajectory calculations, we focus on the dynamics of sodium ions, one ofExpand
MESSENGER: Exploring Mercury’s Magnetosphere
Abstract The MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) mission to Mercury offers our first opportunity to explore this planet’s miniature magnetosphere since the briefExpand
Mercury's Magnetosphere After MESSENGER's First Flyby
TLDR
The magnetic field showed reconnection signatures in the form of flux transfer events, azimuthal rotations consistent with Kelvin-Helmholtz waves along the magnetopause, and extensive ultralow-frequency wave activity. Expand
Evidence for Magnetospheric Effects on the Sodium Atmosphere of Mercury
Monochromatic images of Mercury at the sodium D2 emission line showed excess sodium emission in localized regions at high northern and southern latitudes and day-to-day global variations in theExpand
Interaction of Mercury with the Solar Wind
Abstract We present the structure of the hermean magnetosphere obtained by a global three-dimensional MHD simulation. The magnetic field of Mercury is strong enough to form a permanent magnetosphereExpand
An empirical model of the plasma environment around Mercury
Abstract Since the flyby observations by Mariner 10 in 1974 and 1975, Mercury has been one of the most interesting objects for space physics and planetary exploration. The MESSENGER and BepiColomboExpand
Magnetic Field Observations near Mercury: Preliminary Results from Mariner 10
TLDR
The complete body of data favors the preliminary conclusion that Mercury has an intrinsic magnetic field, which represents a major scientific discovery in planetary magnetism and will have considerable impact on studies of the origin of the solar system. Expand
Mercury's Exosphere: Observations During MESSENGER's First Mercury Flyby
During MESSENGER's first Mercury flyby, the Mercury Atmospheric and Surface Composition Spectrometer measured Mercury's exospheric emissions, including those from the antisunward sodium tail, calciumExpand
Composition of quasi‐stationary solar wind flows from Ulysses/Solar Wind Ion Composition Spectrometer
Using improved, self-consistent analysis techniques, we determine the average solar wind charge state and elemental composition of nearly 40 ion species of He, C, N, O, Ne, Mg, Si, S, and Fe observedExpand
The Structure of Mercury's Magnetic Field from MESSENGER's First Flyby
TLDR
During its first flyby of Mercury, the MESSENGER spacecraft measured the planet's near-equatorial magnetic field, consistent to within an estimated uncertainty of 10% with that observed near the equator by Mariner 10. Expand
...
1
2
...