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Gamma rays from atomic and molecular gas in the large complex of clouds in Orion and Monoceros.

Caraveo, P. A.; Strong, A. W.; Hermsen, W. +4 more

COS-B gamma-ray observations of the large complex of interstellar clouds in Orion and Monoceros are compared with the Columbia CO survey and the Berkeley H I surveys of this region. A good correlation between the gamma-ray emission and the total gas distribution is found. The observed gamma-ray emission can be explained in terms of interactions of…

The radial distribution of galactic gamma rays. II - The distribution of cosmic-ray electrons and nuclei in the outer galaxy

Caraveo, P. A.; Bignami, G. F.; Strong, A. W. +7 more

In the present derivation of the radial distribution of high energy gamma-ray emissivity in the outer Milky Way, the kinematics of H I are used to construct column-density maps in various galactocentric distance ranges that are then used in combination with COS-B spacecraft gamma-ray data to determine emissivities in these distance ranges. The res…

A study of the diffuse galactic gamma radiation.

Fichtel, C. E.; Kniffen, D. A.

The observed diffuse galactic gamma radiation is compared to that predicted from galactic cosmic ray interactions with galactic matter and photons, assuming that on a broad scale the galactic cosmic rays in the plane are correlated with matter density. Recent considerations of the galactic diffuse matter distribution, particularly the molecular hy…

The orbital parameters and the X-ray pulsation of VELA X-1 (4U 0900-40).

van der Klis, M.; Bonnet-Bidaud, J. M.

Results are presented of an analysis of 83 d of 2 - 12 keV X-ray observations of Vela X-1 (4U 0900-40) obtained with the ESA COS-B satellite. Combining the present determinations of the orbital epoch from pulse timing with those obtained with other satellites, the data are found to be consistent with an increase of the orbital period at a rate (P/…