Back to Search
Start Over
Diffuse continuum gamma rays from the Galaxy observed by COMPTEL
- Source :
- Astronomy and Astrophysics. 292(1)
- Publication Year :
- 1994
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1994.
-
Abstract
- The diffuse Galactic continuum gamma-ray emission has been studied using the full Sky Survey from COMPTEL on the Compton Observatory CGRO. The diffuse emission appears to be visible in the whole 0.75-30 MeV range covered by the instrument, although a considerable contribution from unresolved point sources cannot be excluded. A correlation analysis using HI and CO surveys of the Galaxy is used to derive the Galactic emissivity spectrum, and this is consistent with a smooth continuation to the spectrum at higher energies derived by a similar analysis of COS-B data. The apparent conversion factor from integrated CO temperature to molecular hydrogen column density can also be determined from the correlation analysis. The value obtained is consistent with results from COS-B and other non-gamma-ray methods. Calculations of the emissivity spectrum from bremsstrahlung from a cosmic-ray electron spectrum based on propagation models are compared with the observations.
- Subjects :
- Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 00046361
- Volume :
- 292
- Issue :
- 1
- Database :
- NASA Technical Reports
- Journal :
- Astronomy and Astrophysics
- Notes :
- NAS5-26645
- Publication Type :
- Report
- Accession number :
- edsnas.19950043576
- Document Type :
- Report