3C 442A


Basic Data
S178 Alpha FR Class ID Spectrum Best z mag. LAS lg P178 D
17.50.96IIRDpec Gal0.0263R(c) = 13.08 597.0024.27 290.8


Size: 488.8 × 665.6 arcsec²
LUT: Linear
Beam: 7.5 arcsec
Frequency: 1375 MHz
Method: VTESS ՘>7.5
Telescope: VLA A+B+C
Credits: Comins & Owen (1991)

Identified with the E galaxy NGC 7237, which is strongly interacting with its neighbour, NGC 7236.

There are several compact background sources projected in and around this large DRAGN; the true core is the point source near the centre of the image, between the two filaments that cross the central gap.

Apart from the core, there are no high-brightness compact features in the DRAGN, hence the classification as a relaxed double (RD). We have added the suffix "pec" for peculiar, because of the filaments. These cannot be jets, as they do not emanate from the core; at present we do not understand how such filaments are formed.

This main Atlas image is a smoothed version of the original VTESS image, which is available on the "other images" page. The original shows more details but also some weak artifacts in the form of low-level stripes.

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Page created: 2009 Apr 2 14:16:43
J. P. Leahy