An Anomalous UV Extension in NGC6251

Details An Anomalous UV Extension in NGC6251 An Anomalous UV Extension in NGC6251

1997-06-27

arxiv.org/abs/astro-ph/9706277v1

Astronomy and Astrophysics

Astrophysics

14 pages AAStex format + 4 figures; accepted for publication in ApJ Letters

Scientific paper

10.1086/310839

Deep U-band FOC images of the nuclear region of NGC6251 have revealed a region of extended emission which is most probably radiation scattered from a continuum source in the nucleus. This radiation lies interior to a dust ring, is nearly perpendicular to the radio jet axis, and is seen primarily in the FOC U and b filters. The extension has a low observed polarization($\le 10%$), and is unlikely to arise from line emission. We know of no other examples similar to what we have found in NGC 6251, and we offer some tentative explanations. The nuclear morphology shows clear similarities to that seen in the nucleus of NGC 4261 except for the extended U-band radiation.

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