Abstract
view Abstract Citations (11) References (10) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS What is the compact radio source in the nucleus of M82? Kronberg, P. P. ; Clarke, J. N. Abstract Interferometric observations at 8085 MHz of the strong compact radio source (designated 49.1+58) in the nucleus of M82 are reported which were performed in 1971 and repeated in 1975 to search for flux-density variations. High-sensitivity 8-GHz maps of M82 are presented, and upper limits of 3% along the main radio ridge and 0.3% for 49.1+58 are placed on the linear polarization. It is found that the flux density from 49.1+58 decreased by about 14% in four years; the relative stability of the source is taken to suggest that the source is not expanding and not dynamically confined. A very high ratio of relativistic- to cold-plasma density (no less than about 4000) is determined, indicating that the particle generator in this source is probably the strong magnetic field of a supermassive object which is presumably in a highly collapsed state. It is concluded that there is considerable disorder in the magnetic-field structure of 49.1+58. Publication: The Astrophysical Journal Pub Date: September 1978 DOI: 10.1086/182757 Bibcode: 1978ApJ...224L..51K Keywords: Galactic Nuclei; Galactic Radiation; Radio Sources (Astronomy); Astronomical Maps; Linear Polarization; Microwave Emission; Polarized Electromagnetic Radiation; Astrophysics; Galactic Nuclei:Radio Sources full text sources ADS | data products NED (1)
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