CCD surface photometry of the Seyfert 1 galaxy NGC 4151 |
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| Authors: | Angeles I Díaz Miguel Sánchez Portal Roberto Terlevich Elena Terlevich |
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| Institution: | (1) Dpto. de Física Teórica, C-XI, Universidad Autónoma de Madrid, Cantoblanco, Madrid, Spain;(2) Royal Greenwich Observatory, CB3 OEZ Cambridge, U.K. |
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| Abstract: | We present CCD surface photometry of the central region of the bright Seyfert 1 galaxy NGC 4151. The observations were obtained under excellent seeing conditions ( 0.75 FWHM). Morphological parameters for the bulge of the galaxy are estimated from the observed broad bandV, R, andI surface brightness profiles.From the analysis of the colour maps two distinct nuclear structures emerge perpendicular to each other. One of them is elliptically elongated at PA angle  50°. This direction is close to the direction of the radio jets and coincides with the Extended Narrow Emission Line Region (ENELR). Its extension is about 7 arc sec and its colours are bluer than the surronding bulge. The second structure is smaller in extension (about 1 arc sec) and is elongated at PA130°. Its colours are redder than those of the surrounding bulge. It is suggested that this might constitute areal extension of the Broad Line Region (BLR).Paper presented at the 11th European Regional Astronomical Meetings of the IAU on  New Windows to the Universe , held 3–8 July, 1989, Tenerife, Canary Islands, Spain. |
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