3C 223.1: A source with unusual spectral properties

Details 3C 223.1: A source with unusual spectral properties 3C 223.1: A source with unusual spectral properties

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005mnras.356..232l&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 356, Issue 1, pp. 232-236.

Astronomy and Astrophysics

Astronomy

10

Galaxies: Active, Galaxies: Formation, Galaxies: Individual: 3C 223.1, Radio Continuum: Galaxies

Scientific paper

Analysis of Giant Metrewave Radio Telescope low-frequency data for an X-shaped source, 3C 223.1, has revealed an unusual result. The radio morphologies of it at 240 and 610 MHz show a well defined X shape with a pair of active jets along the north-south axis and a pair of wings along the east-west axis, which pass symmetrically through the undetected radio core. The wings (or low-surface-brightness jets) have flatter spectral indices with respect to the high-surface-brightness jets; this confirms the earlier marginal result obtained at high frequency by Dennett-Thorpe et al. (2002). Although unusual, it is a valuable result which puts stringent constraints on the formation models and the nature of these sources. This result clearly shows the value of mapping the sample of X-shaped sources at low frequencies.

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