20-22 May 2015
Asia/Bangkok timezone
The Centennial Celebration of General Relativity Theory and 80 Years of Thai Physics Graduate

Angular Extension of Io Magnetic Footprint in Corresponding to Volcanic Activity on Io

21 May 2015, 13:15
15m
White Lotus ()

White Lotus

Oral presentation Astronomy, Astrophysics, and Cosmology Astronomy, Astrophysics and Cosmology (Sponsored by NARIT)

Speaker

Dr Suwicha Wannawichian (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand)

Description

FUV images of Jupiter’s auroral region have been taken since the early observational era of the Hubble Space Telescope (HST). In the vicinity of the main auroral oval, an emission spot was detected and appeared to be evidence of electromagnetic interaction between Jupiter’s magnetospheric plasma and Io’s atmosphere. In previous works, the brightness of this emission, which is called Io’s auroral magnetic footprint, reveals strong correlation with Io’s location in Jupiter’s system III longitude. In 2007, with HST’s Advanced Camera for Surveys (ACS), the magnetic footprints of Io were observed, while the volcanoes on Io concurrently erupted. In this study, the magnetic footprint emissions were chosen regarding the variation of Io’s locations. Detailed analysis of the angular extension of Io’s magnetic footprint was presented. Based on the complexity of angular extension due to the multiplicity of the footprint spots, the connection between angular extensions of Io magnetic footprints and the volcanic activity reveals some correlation. This result suggests the possible influence of the picked-up current on the extension of the interaction region between precipitating electrons and Jupiter’s ionospheric particles.

Primary author

Dr Suwicha Wannawichian (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand)

Co-authors

Prof. John Clarke (Center for Space Physics, Boston University, Boston, MA 02215, USA) Dr Jonathan Nichols (Department of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH, United Kingdom) Dr Utane Sawangwit (National Astronomical Research Institute of Thailand, Chiang Mai 50200, Thailand)

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