Homework
Written report topic (WRT) # 1. Assume stochastic acceleration at the loop top with a power-law spectrum of magnetic turbulence. Calculate the DSR spectrum from power-law electron distributions with different power-law indices. Express the result in Solar Flux Units (sfu). Normalize the source volume by 1027cm3 and the turbulent magnetic energy by 103 erg cm-3. Review the papers on the betatron and Fermi acceleration in the collapsing traps.
WRT # 2. Express the DRL spectrum, calculated at the first step, in Solar Flux
Units (sfu). Normalize the Langmuir energy density by 103 erg cm-3. Consider
cases of large-scale and small-scale Langmuir turbulence.
WRT # 3. Using Step 1 results, calculate
intensity of the synchrotron radiation taking into account the free-free
absorption in the warm interstellar medium and in the local cloud. Assume that
the local cloud is isotropic spherical layer with some thickness (a few pc).
WRT # 4. Assume global sausage mode
oscillations of the magnetic loop. Calculate modulation amplitude (or power),
phase, and degree of polarization as a function of frequency.
WRT # 5. Using Step 1 results present the
radio emission flux in Solar Flux Units (sfu). Review and describe different
models suggested for the Masuda source in the literature.
WRT # 6. Using Step 1 results calculate
synchrotron spectra from a few locations including the location of the spatial
peak of the emission.
For all WRT: expand the introduction for
the written report. Use Latex, e.g., ApJ style (preferable).