The Nuclei of Nearby Radio-Loud Ellipticals

(2) STScI; (3) Columbia University); C.M. Carollo (3); C.P. O'Dea (2); C. Xu (2); G.A. Verdoes Kleijn (1); J. Noel-Storr (3) ((1) Leiden Observatory; P.T. de Zeeuw (1); R.P. van der Marel (2); S.A. Baum (2)

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The Nuclei of Nearby Radio-Loud Ellipticals

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arxiv astro-ph/0012126 v1 pith:MESVQELR submitted 2000-12-06 astro-ph

G.A. Verdoes Kleijn (1) , P.T. de Zeeuw (1) , S.A. Baum (2) , C.P. O'Dea (2) , R.P. van der Marel (2) , C. Xu (2) , C.M. Carollo (3) , J. Noel-Storr (3) ((1) Leiden Observatory

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(2) STScI (3) Columbia University)

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We have observed a complete sample of 21 nearby (D < 70h^{-1} Mpc) Fanaroff & Riley Type I galaxies with HST/WFPC2 and detected dust disks and lanes in 19 of them. The radio jets are roughly perpendicular to the dust which is used to constrain the Doppler boosting factors of the radio jet and cores. The VLBA core flux correlates with the central Halpha+[NII] flux which might indicate that the VLBA core is dominated by an isotropic component. Twelve galaxies show nuclear optical sources. We discuss various possible origins for this emission.

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