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Gas dynamics in the barred Seyfert galaxy NGC4151 - II. High resolution HI study
(Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 1999-04)
We present sensitive, high angular resolution (6′′ × 5′′) λ21-cm observations of the neutral hydrogen in the nearby barred Seyfert galaxy, NGC4151. These HI observations, obtained using the VLA in B-configuration, are the ...
On the absence of broad MgII emission-line variability in NGC 3516 during 1996
(University of Chicago Press: Astrophysical Journal Letters, 1999-02-20)
During the 1996 HST/FOS monitoring campaign of the Seyfert 1 galaxy NGC 3516, the UV continuum showed a factor of 5 variation; correspondingly the strongest broad UV emission lines (e.g. Ly, Civ) displayed somewhat weaker, ...