High-resolution observations of M87. I - The morphology of the jet

Details High-resolution observations of M87. I - The morphology of the jet High-resolution observations of M87. I - The morphology of the jet

May 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...109...95n&link_type=abstract

Astronomy and Astrophysics, vol. 109, no. 1, May 1982, p. 95-100.

Astronomy and Astrophysics

Astrophysics

44

Elliptical Galaxies, Galactic Nuclei, Plasma Jets, Plasma Oscillations, Ubv Spectra, High Resolution, Morphology, Periodic Variations

Scientific paper

A description of the morphology of the optical M87 jet is presented on the basis of high-resolution UBV observations made with the 3.6-m CFH telescope at Mauna Kea and with the 106-cm reflector at Pic-du-Midi. The jet is shown to consist of a large number of discrete knots grouped in complexes, with no evidence for a continuous component between the knots. The complexes, including the nucleus, are spaced regularly along the jet with an approximate period of 2.9 arcsec, suggesting a periodic mechanism varying only in intensity which gives rise to the knots. Jet morphology is also observed to be independent of wavelength in the U, B and V bands as well as at 2 and 6 cm, suggesting that the physical parameters and spectral indices of the knots are constant throughout.

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