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  • Roth, M.  (5)
  • English  (5)
  • 2000-2004  (5)
  • 1
    Online Resource
    Online Resource
    Transients at the dusk side magnetospheric boundary: Surface waves or isolated plasma blobs?
    American Geophysical Union (AGU) ; 2001
    In:  Journal of Geophysical Research: Space Physics Vol. 106, No. A11 ( 2001-11), p. 25503-25516
    Details
    In: Journal of Geophysical Research: Space Physics, American Geophysical Union (AGU), Vol. 106, No. A11 ( 2001-11), p. 25503-25516
    Abstract: We revisit Interball‐Tail and Magion‐4 observations of the dusk side magnetospheric boundary on February 15–16, 1996. The observed transient behavior of the boundary can be interpreted in terms of surface waves or as the manifestation of isolated magnetosheath plasma entities embedded in the magnetosphere. We examine the arguments for each of these interpretations with high time resolution magnetic field and plasma data and by exploiting the dual‐satellite nature of the observations. We find strong evidence for magnetic field and flow vortices near the magnetospheric boundary and hence for the existence of flux tubes with helicoidal field lines; such structures can be associated with both interpretations. The cross‐correlation between the dual satellite observations and the apparent periodicity strongly suggest a Kelvin‐Helmholtz surface wave, although other interpretations are not impossible. In any case, the observations for this particular event allow us to derive constraints on surface wave generation mechanisms and on scenarios that could account for the presence of isolated plasma elements in the magnetosphere.
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/2001JA900044
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2001
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    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Ulysses observations of sector boundaries at aphelion
    American Geophysical Union (AGU) ; 2000
    In:  Journal of Geophysical Research: Space Physics Vol. 105, No. A7 ( 2000-07), p. 15689-15698
    Details
    In: Journal of Geophysical Research: Space Physics, American Geophysical Union (AGU), Vol. 105, No. A7 ( 2000-07), p. 15689-15698
    Abstract: We study a sample of sector boundaries observed by Ulysses near its early 1998 aphelion at 5.4 AU. We relate these sector boundaries to solar wind structure seen by Wind at 1 AU, guided by a hydrodynamic simulation. For each Ulysses sector boundary we are able to identify a corresponding 1 AU sector boundary, except when strong transients are present. Sector boundaries appear embedded in complex plasma structures that generally are in a state of pressure balance. Minimum variance analysis confirms the tangential discontinuity nature of the heliospheric current sheet (HCS) and indicates that the current sheet tends to be inclined more steeply than at 1 AU (HCS normal closer to the equatorial plane and nearly radially outward). We discuss evidence for the nonplanarity of the current sheet. Magnetic field depressions are characteristic features of the sector boundaries. We attribute them to particles that are magnetically confined inside the current sheet and that carry the diamagnetic current responsible for the large magnetic field rotation.
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/2000JA900040
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2000
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    detail.hit.zdb_id: 3094104-0
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    detail.hit.zdb_id: 3094268-8
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    SSG: 16,13
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Structural analysis of periodic surface waves on the magnetospheric boundary
    Elsevier BV ; 2003
    In:  Planetary and Space Science Vol. 51, No. 12 ( 2003-10), p. 757-768
    Details
    In: Planetary and Space Science, Elsevier BV, Vol. 51, No. 12 ( 2003-10), p. 757-768
    Type of Medium: Online Resource
    ISSN: 0032-0633
    URL: Article
    DOI: 10.1016/S0032-0633(03)00112-0
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2003
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  • 4
    Online Resource
    Online Resource
    Reconstruction of the magnetopause and low-latitude boundary layer topology using Cluster multi-point measurements
    Copernicus GmbH ; 2004
    In:  Annales Geophysicae Vol. 22, No. 7 ( 2004-07-14), p. 2381-2389
    Details
    In: Annales Geophysicae, Copernicus GmbH, Vol. 22, No. 7 ( 2004-07-14), p. 2381-2389
    Abstract: Abstract. Multi-spacecraft data from Cluster allow for a more detailed magnetopause and boundary layer structure determination than ever before. Reconstruction methods, in which the time variability observed during a pass is interpreted as being due to boundary motion and/or spatial structure, are particularly well suited for this task. Such methods rely on the availability of plasma and field data and adopt the tangential discontinuity hypothesis to determine the motion, acceleration, boundary structure, boundary curvature and surface wave speed over an extended time interval. In this paper one- and two-dimensional reconstruction methods are applied to multi-spacecraft data for the first time.
    Type of Medium: Online Resource
    ISSN: 1432-0576
    URL: Article
    DOI: 10.5194/angeo-22-2381-2004
    Language: English
    Publisher: Copernicus GmbH
    Publication Date: 2004
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    Location Call Number Limitation Availability
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  • 5
    Online Resource
    Online Resource
    Trying to bring the magnetopause to a standstill : TRYING TO BRING THE MAGNETOPAUSE AT A STANDSTILL
    American Geophysical Union (AGU) ; 2002
    In:  Geophysical Research Letters Vol. 29, No. 10 ( 2002-05-15), p. 93-1-93-4
    Details
    In: Geophysical Research Letters, American Geophysical Union (AGU), Vol. 29, No. 10 ( 2002-05-15), p. 93-1-93-4
    Type of Medium: Online Resource
    ISSN: 0094-8276
    URL: Article
    DOI: 10.1029/2002GL015001
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2002
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    SSG: 16,13
    Location Call Number Limitation Availability
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