Astronomy and Astrophysics – Astronomy
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...222l..27h&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 222, May 15, 1978, p. L27-L31.
Astronomy and Astrophysics
Astronomy
8
Hydrogen Clouds, Nebulae, Radio Sources (Astronomy), X Ray Sources, Astronomical Maps, Astronomical Models, Black Holes (Astronomy), Infrared Astronomy, Neutron Stars
Scientific paper
It is suggested that most of the unique properties of the radio nebula W3(OH) can be explained if the object which excites the main H II component is a compact object moving through the surrounding H I cloud. Radio synthesis and continuum observations of W3(OH) are reviewed, and a model is discussed in which an X-ray source with a temperature of 10 million K and a luminosity of 5 by 10 to the 37th power erg/s is embedded in a medium with a density of 100,000 per cu cm. The possibility of a compact object producing the required luminosity is considered, a mass of 8 to 11 solar masses (depending on distance) is estimated, and the mass is shown to suggest that the compact object is a black hole rather than a neutron star. Previous estimates of the density of compact objects in the Galaxy are noted.
Hughes V. A.
Viner M. R.
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