Helical Strands in the Jet-like Narrow Line Region of ESO 428-G14

Details Helical Strands in the Jet-like Narrow Line Region of ESO 428-G14 Helical Strands in the Jet-like Narrow Line Region of ESO 428-G14

1996-08-08

arxiv.org/abs/astro-ph/9608038v1

Astronomy and Astrophysics

Astrophysics

ApJ Letters, accepted for publication, 10 pages, 2 PS Figures, AASTeX, also available at http://www.astro.umd.edu/~hfalcke/p

Scientific paper

10.1086/310299

We present HST/WFPC2 images of the narrow line region (NLR) of the Seyfert 2 galaxy ESO 428-G14 (0714-2914, M4-1). The NLR consists of many individual, thin strands, which are very closely related to the radio jet and produce a highly complex yet ordered structure. We find that the jet is two-sided with a double-helix of emission-line gas apparently wrapped around the NW side. To the SE, the jet seems to be deflected at a ridge of highly excited gas. The strands to the SE may also wrap around the radio jet, but here complete helices are not seen. The overall structure is reminiscent of the jet seen in NGC 4258. Faint symmetric features aligned with the nucleus could indicate the presence of a highly collimated beam of photons or plasma from the center.

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