Nonthermal galactic emission below 10 megahertz.
Abstract
The Radio Astronomy Explorer 2 (RAE 2) lunar-orbiting satellite has provided measurements of the nonthermal galactic radio emission at frequencies below 10 MHz. Measurements of the emission spectra are presented for the center, anticenter, north polar, and south polar directions at 22 frequencies between 0.25 and 9.18 MHz. Survey maps of the spatial distribution of the observed low-frequency Galactic emission at 1.31, 2.20, 3.93, 4.70, 6.55, and 9.18 MHz are presented. The observations were obtained with the 229-m traveling-wave V antenna on this lunar-orbiting spacecraft. The improved frequency coverage offers additional insights into the structure of the local Galactic neighborhood.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- April 1978
- DOI:
- Bibcode:
- 1978ApJ...221..114N
- Keywords:
-
- Galactic Radiation;
- High Frequencies;
- Milky Way Galaxy;
- Nonthermal Radiation;
- Radio Astronomy;
- Synchrotron Radiation;
- Astronomical Maps;
- Data Reduction;
- Emission Spectra;
- Explorer 43 Satellite;
- Explorer 49 Satellite;
- Astronomy;
- Galactic Structure;
- Galaxy:Radio Radiation