The steep-spectrum low-frequency variable source 3C 99: radio and optical observations.

Details The steep-spectrum low-frequency variable source 3C 99: radio and optical observations. The steep-spectrum low-frequency variable source 3C 99: radio and optical observations.

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.245..427m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. Vol. 245, No. 3, p. 427 - 433

Astronomy and Astrophysics

Astronomy

18

Radio Galaxies: Radio Structure, Radio Galaxies: Radio Spectra, Radio Galaxies: Emission Lines

Scientific paper

The authors present VLA, MERLIN and VLBI observations at cm wavelengths of the radio galaxy 3C 99, a low-frequency variable source with a steep radio spectrum. The radio observations show that the source consists of three principal components, which are roughly collinear and have steep radio spectra. Of these, the middle component is the brightest feature at the highest resolutions, has the lowest limits on the degree of polarization and is closest to the position of the optical galaxy. The authors associate this component with the nucleus of the galaxy and suggest that interstellar scattering of the radiation from it could be responsible for the observed low-frequency variability. The two outer components are very asymmetrically located relative to the nucleus, and also differ in peak brightness by a factor of about 70. The authors also present optical spectroscopic observations, made with the Isaac Newton Telescope, which show the presence of extended [O III] emission with a systematic velocity shift of the line across the source. They discuss possible relationships between the extended line emission and the radio structure.

Affiliated with

Also associated with

No associations

Rating

The steep-spectrum low-frequency variable source 3C 99: radio and optical observations. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The steep-spectrum low-frequency variable source 3C 99: radio and optical observations., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The steep-spectrum low-frequency variable source 3C 99: radio and optical observations. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1129134