Reply to Comment by Lamy et al. on “Locating the source field lines of Jovian decametric radio emissions”  

作　　者：YuMing Wang RuoBing Zheng XianZhe Jia ChuanBing Wang Shui Wang V.Krupar 

机构地区：[1]CAS Key Laboratory of Geospace Environment,School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China [2]CAS Center for Excellence in Comparative Planetology,Hefei 230026,China [3]Mengcheng National Geophysical Observatory,School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China [4]Department of Climate and Space Sciences and Engineering,University of Michigan,Ann Arbor,MI 48109-2143,USA [5]Universities Space Research Association,Columbia,Maryland,USA [6]NASA Goddard Space Flight Center,Greenbelt,Maryland,USA [7]Department of Space Physics,Institute of Atmospheric Physics,The Czech Academy of Sciences,Prague,Czech Republic

出　　处：《Earth and Planetary Physics》2022年第1期13-17,共5页地球与行星物理（英文版）

基　　金：supported by the Strategic Priority Program of the Chinese Academy of Sciences(Grant No.XDB41000000);the NSFC(Grant Nos 42188101 and 42130204).

摘　　要：Locating the source of decametric(DAM)radio emissions is a key step in the use of remote radio observations to understand the Jovian magnetospheric dynamics and their interaction with the planet’s moons.Wang YM et al.(2020)presented a method by which recorded arc-shaped DAM emissions in the radio dynamic spectra can be used to locate the source of a DAM.An Io-related DAM event on March 14,2014 was used to demonstrate the method.A key parameter in the method is whether the DAM is emitted in the northern or the southern hemisphere;the hemisphere of origin can be determined definitively from the polarization of the emission.Unfortunately,polarization information for the emission on March 14,2014 event was not recorded.Our analysis assumed the source to be in the northern hemisphere.Lamy et al.(2022)argue convincingly that the source was probably in the southern hemisphere.We appreciate the helpful contribution of Lamy et al.(2022)to this discussion and have updated our analysis,this time assuming that the DAM source was in the southern hemisphere.We also explore the sensitivity of our method to another parameter-the height at which the value of fce,max,which is the maximal electron cyclotron frequency reached along the active magnetic flux tube,is adopted.Finally,we introduce our recent statistical study of 68 DAM events,which lays a more solid basis for testing the reliability of our method,which we continue to suggest is a promising tool by which remote radio observations can be used to locate the emission source of Jovian DAMs.

关 键 词：radio decametric emissions Jovian magnetosphere energetic electrons 

分 类 号：P161[天文地球—天文学]