VLA observations of the optical jets and nucleus of NGC 1097

Details VLA observations of the optical jets and nucleus of NGC 1097 VLA observations of the optical jets and nucleus of NGC 1097

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.207..889w&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 207, April 15, 1984, p. 889-896.

Astronomy and Astrophysics

Astronomy

34

Barred Galaxies, Galactic Nuclei, Galactic Radiation, Light Emission, Plasma Jets, Radio Galaxies, Bremsstrahlung, Centimeter Waves, Galactic Structure, Interstellar Gas, Nonthermal Radiation, Thermal Emission

Scientific paper

Failure to detect the extended optical jets of NGC 1097 at 20 cm leads to the conclusion that these jets are not the consequence of synchrotron emission, but rather of thermal bremsstrahlung emission. The flat spectrum at optical and near-infrared wavelenghts and the lack of optical spectral lines set a lower temperature limit for the hot gas, while a null detection at X-ray wavelengths sets an upper temperature limit. The coincidence of these limits requires the gas to be at approximately 1,000,000 K. The electron density is about 2/cu cm. The emitting plasma is probably ambient material piled up by particles ejected from the nucleus of NGC 1097. A phenomenon which is apparently unrelated is a bright ring of nonthermal emission from the nucleus of NGC 1097. This ring is coincident with a ring of optical hotspots and with 10 micron emission, and can be understood in terms of a model which invokes vigorous star-formation and supernova production.

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