CO observations of the Cepheus flare. II - Gamma rays from the interstellar gas and a possible new COS B source

Details CO observations of the Cepheus flare. II - Gamma rays from the interstellar gas and a possible new COS B source CO observations of the Cepheus flare. II - Gamma rays from the interstellar gas and a possible new COS B source

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...360..129g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 360, Sept. 1, 1990, p. 129-135.

Astronomy and Astrophysics

Astronomy

9

Cepheid Variables, Gamma Ray Astronomy, Interstellar Chemistry, Interstellar Gas, Molecular Clouds, Cos-B Satellite, Cosmic Rays, Interstellar Matter, Maximum Likelihood Estimates

Scientific paper

In this paper, a maximum-likelihood analysis is used to compare maps of the H I and (C-12)O interstellar gas in the Cepheus Flare region to COS B gamma-ray data for these clouds. The results imply a value of (2.3 + or - 1.2) x 10 to the 20th mol/sq cm/K/km-s for the N(H2)/W(CO) ratio in the Cepheus molecular complex. The presence of a significant pointlike excess which stands above the diffuse gamma radiation at l = 111 deg, b = 19.8 deg is demonstrated. The excess may correspond to a new, bright, and extremely soft gamma-ray source.

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