Peak-flux-density spectra of large solar radio bursts and proton emission from flares

Technical Report · Fri Jun 22 04:00:00 EDT 1984

OSTI ID:5503067

Cliver, E W; Gentile, L F; McNamara, L F

The relationship between u-shaped peak-flux-density microwave spectra and solar-proton events is reexamined for about 200 large (Sp( > or= 2 Ghz) > or = 800 sfu) microwave bursts (1965-1979). The radio spectra fell into two basic classes: U-shaped, with two maxima ( > or = 800 sfu) in the range from 200 Mhz to > or = 10 Ghz (59% of all events) and cut-off spectra, with a maximum > or = 800 sfu at f > or = 2 GHz to and Sp(200 MHz) < 100 sfu (18%). Nine percent of the events had intermediate spectra with a maximum > or = 800 sfu at f > or = 2 GHz and 100 sfu < or = Sp(200 MHz) < 800 sfu. Examples of each of these three spectral types are given. 15 percent of the events could not be classified because of incomplete data.

• Research Organization: Air Force Geophysics Lab., Hanscom AFB, MA (USA)
• OSTI ID: 5503067
• Report Number(s): AD-A-187027/8/XAB; AFGL-TR-87-0298
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics &amp; Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BARYONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
FLUX DENSITY
HADRONS
NUCLEONS
PROTONS
RADIATIONS
RADIOWAVE RADIATION
SOLAR ACTIVITY
SOLAR FLARES
SOLAR PARTICLES
SOLAR PROTONS
SOLAR RADIATION
SOLAR RADIO BURSTS
STELLAR RADIATION