学術雑誌論文 THE BEAMING STRUCTURES OF JUPITER’S DECAMETRIC COMMON S-BURSTS OBSERVED FROM THE LWA1, NDA, AND URAN2 RADIO TELESCOPES

Imai, Masafumi  ,  Lecacheux, Alain  ,  Clarke, Tracy E.  ,  Higgins, Charles A.  ,  Panchenko, Mykhaylo  ,  Dowell, Jayce  ,  Imai, Kazumasa  ,  Brazhenko, Anatolii I.  ,  Frantsuzenko, Anatolii V.  ,  Konovalenko, Alexandr A.

826 ( 2 ) 2016-07-29 , IOP Publishing
ISSN:0004-637X
NII書誌ID(NCID):AA00553242
内容記述
On 2015 February 21, simultaneous observations of Jupiter's decametric radio emission between 10 and 33 MHz were carried out using three powerful low-frequency radio telescopes: the Long Wavelength Array Station One in the USA, the Nançay Decameter Array in France, and the URAN2 telescope in Ukraine. We measured the lag times of short-bursts (S-bursts) for 105 minutes of data over effective baselines of up to 8460 km by using cross-correlation analysis of the spectrograms from each instrument. Of particular interest is the measurement of the beaming thickness of S-bursts, testing if either flashlight- or beacon-like beaming is emanating from Jupiter. We find that the lag times for all pairs drift slightly as time elapses, in agreement with expectations from the flashlight-like beaming model. This leads to a new constraint of the minimum beaming thickness of 2farcs66. Also, we find that most of the analyzed data abound with S-bursts, whose occurrence probability peaks at 17–18 MHz.
本文を読む

http://repository.kulib.kyoto-u.ac.jp/dspace/bitstream/2433/216148/1/0004-637X_826_2_176.pdf

このアイテムのアクセス数:  回

その他の情報