Haewsantati_2017_J._Phys.%3A_Conf._Ser._901_012013.pdf (269.6 kB)
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Auroral bright spot in Jupiter's active region in corresponding to solar wind dynamic

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conference contribution
posted on 16.05.2018, 13:48 by K. Haewsantati, S. Wannawichian, J. T. Clarke, J. D. Nichols
Jupiter's polar emission has brightness whose behavior appears to be unstable. This work focuses on the bright spot in active region which is a section of Jupiter's polar emission. Images of the aurora were taken by Advanced Camera for Surveys (ACS) onboard the Hubble Space Telescope (HST). Previously, two bright spots, which were found on 13 th May 2007, were suggested to be fixed on locations described by system III longitude. The bright spot's origin in equatorial plane was proposed to be at distance 80-90 Jovian radii and probably associated with the solar wind properties. This study analyzes additional data on May 2007 to study long-term variation of brightness and locations of bright spots. The newly modified magnetosphere-ionosphere mapping based on VIP4 and VIPAL model is used to locate the origin of bright spot in magnetosphere. Furthermore, the Michigan Solar Wind Model or mSWiM is also used to study the variation of solar wind dynamic pressure during the time of bright spot's observation. We found that the bright spots appear in similar locations which correspond to similar origins in magnetosphere. In addition, the solar wind dynamic pressure should probably affect the bright spot's variation.


We would like to acknowledge Marissa Vogt from Boston University for the permission to use Jupiter Ionosphere/ Magnetosphere Online Mapping Tool. We also thank K.C. Hansen and B. Zieger for their Michigan Solar Wind Model. This work is based on observation with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by AURA, Incorporated, for NASA. The research was supported by National Astronomical Research Institute of Thailand (NARIT) and Graduate School Chiang Mai University. Haewsantati was partially supported by Science Achievement Scholarship of Thailand (SAST).



Journal of Physics: Conference Series, 2017, 901 (1), pp. 012013-012013

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/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy


Siam Physics Congress 2017 (SPC2017)


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