X-Ray Expanding Features Associated with a Moreton Wave

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Abstract

We report on the simultaneous observation of a Moreton wave in Hα and two kinds of coronal expanding features in soft X-rays near the solar limb. We consider the faster X-ray feature and the slower one as being an ``X-ray wave'' and ``ejecta'', respectively. The chromospheric Moreton wave propagated on the solar disk at a speed of 1040±100kms[-1] , whereas the coronal X-ray wave propagated outside of the disk toward the outer corona at 1400±250kms[-1]. We identified the X-ray wave as MHD fast-mode shock. The fast-mode Mach number (Mf) of the X-ray wave was also estimated to be about 1.13-1.31, which decreases during propagation. The timing when the Mf became ``1'' is consistent with that of the disappearance of the Moreton wave. Moreover, we discuss the 3-dimensional structure of the shock wave and the relation between the shock wave and the ejecta (and Hα filament eruptions).

Journal

  • Publications of the Astronomical Society of Japan

    Publications of the Astronomical Society of Japan 56(2), L5-L8, 2004-04-25

    ASTRONOMICAL SOCIETY OF JAPAN

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  • Solar Active Phenomena Unveiled from Recent Observation  [in Japanese]

    ASAI Ayumi , Ayumi ASAI , 国立天文台野辺山太陽電波観測所 , Nobeyama Solar Radio Observatory National Astronomical Observatory of Japan

    Journal of Japan Society of Fluid Mechanics 28(5), 371-380, 2009-10-25

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Codes

  • NII Article ID (NAID)
    10023930539
  • NII NACSIS-CAT ID (NCID)
    AA1082896X
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    00046264
  • NDL Article ID
    6928634
  • NDL Source Classification
    ZM33(科学技術--宇宙科学)
  • NDL Call No.
    Z53-A296
  • Data Source
    CJP  CJPref  NDL  IR 
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