Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.128..135k&link_type=abstract
(Universitaets-Sternwarte Jena, Jena Workshop on the Role of Dust in Dense Regions of Interstellar Matter, Georgenthal, East Ger
Astronomy and Astrophysics
Astronomy
10
Gamma Ray Astronomy, Ophiuchi Clouds, Stellar Physics, Infrared Astronomy, Interstellar Extinction, Interstellar Matter, Star Clusters, Star Formation
Scientific paper
The cloud represents one of the strongest detectable γ-ray sources for energies greater than 100 MeV. X-ray observations gave no evidence that the cloud is interacting with a supernova remnant or a neutron star what was supposed to account for the observed γ-ray flux. Ultraviolet observations indicate that a considerable number of small particles is present toward the embedded star HD 147889. The ratio of total to selective extinction is R > 4 toward the denser regions of the cloud. An embedded stellar cluster of about 50 stars was detected by four IR-surveys toward the central region of the cloud. Far-IR observations indicate that there are only 3 B-stars within the cloud. The dust-temperature reaches locally 50K. More than 10 different molecular species were detected by radio observations. There are two dense regions within the cloud which are likely contracting.
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