Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pazh...10..345r&link_type=abstract
(Pis'ma v Astronomicheskii Zhurnal, vol. 10, May 1984, p. 345-351) Soviet Astronomy Letters (ISSN 0360-0327), vol. 10, May-June
Astronomy and Astrophysics
Astronomy
2
Orion Nebula, Radio Astronomy, Water Masers, Flux Density, Spectral Correlation, Spectral Line Width, Very Long Base Interferometry
Scientific paper
The results of a VLBI study of the Kleinmann-Low (KL) nebulosity in the Orion nebula are presented. The flare region structure is examined and the correlation of line parameters with source size is considered. An extended halo radiating mainly in the low-frequency wing of the line profile is observed along with emission components spaced 0.0025-0.010 arcsec apart. The central, strongest component has a compound structure with a diameter ranging from 0.0009-0.0025 arcsec, depending on the portion of the line measured. The most intense part of the line is emitted by the most compact zone. All the spatial components of the Orion-KL source are linearly polarized, with the polarized radiation concentrated toward the center of the flare region. The flare region exhibits a brightness temperature of roughly 1.4 x 10 to the 15th K. It is concluded that the line width is determined by the differential velocities of the individual emission regions.
Matveenko Leonid I.
Romanov Alexander M.
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