Interplanetary Type II Radio Bursts and the Role of Synchrotron Radiation

Details Interplanetary Type II Radio Bursts and the Role of Synchrotron Radiation Interplanetary Type II Radio Bursts and the Role of Synchrotron Radiation

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....41.3709c&link_type=abstract

American Astronomical Society, SPD meeting #41, #37.09

Astronomy and Astrophysics

Astronomy

Scientific paper

Type II radio bursts are a type of slow drift radio emission associated with shocks in the solar corona and in the interplanetary medium. It is widely assumed that interplanetary (IP) type II radio bursts are the result of plasma radiation from Langmuir waves excited by suprathermal electrons in the upstream region of a shock driven by a fast coronal mass ejection (CME). Alternatively, some IP type II events may instead be the result of synchrotron radiation from 1 MeV electrons. We present a sample of fast-CME/IP-type-II events characterized by smoothly varying emission and large frequency bandwidths and consider the implications of both the plasma radiation hypothesis and the synchrotron emission hypothesis.

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