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Author Lo, K. Y. ♦ Schilizzi, R. T. ♦ Cohen, M. H. ♦ Ross, H. N.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher Institute of Physics (IOP)
Language English
Subject Keyword Physics (Astrophysics & Cosmology)-Quasi-stellar, Radio & X-Ray Sources ♦ Physics (Astrophysics & Cosmology)-Galaxies ♦ Physics Research-Astrophysics & Cosmology-Quasi- Stellar, Radio & X-Ray Sources ♦ COSMIC RADIO SOURCES- RADIOWAVE RADIATION ♦ MILKY WAY- COSMIC RADIO SOURCES ♦ BRIGHTNESS ♦ FLUX DENSITY ♦ INTERFEROMETRY ♦ RESOLUTION ♦ SIZE ♦ TEMPERATURE DEPENDENCE
Abstract A compact radio source at the galactic center has been detected at 3.7 cm on a very long baseline interferometer composed of the Goldstone 64-m and the Owens Valley 40-m telescopes (separation 252 km). The source has an angular size, theta/subs/, on the order of or less than 0./sub /''02, corresponding to a linear size approximately-less-than200 AU or 10$sup -3$ pc, at the distance of the galactic center (10 kpc). The measured flux density is 0.6+-0.1 Jy. The brightness temperature of the source is 3x10$sup 7$ K if theta/subs/approx. =0./ sub /''02. Comparison with previous high-resolution observations of the galactic center suggests time variation in the flux density. The nature of the compact radio source is discussed. (AIP)
ISSN 0004637X
Educational Use Research
Learning Resource Type Article
Publisher Date 1975-12-01
Publisher Department Owens Valley Radio Observatory, California Institute of Technology
Publisher Place United States
Journal Astrophysical Journal
Volume Number 202
Organization Owens Valley Radio Observatory, California Institute of Technology


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