Physical Sciences and Mathematics Commons^™

The Supermassive Black Hole And Double Nucleus Of The Core Elliptical Ngc 5419, Ximena Mazzalay, Jens Thomas, Roberto P. Saglia, Gary A. Wegner

Dartmouth Scholarship

We obtained adaptive-optics assisted SINFONI observations of the central regions of the giant elliptical galaxy NGC5419 with a spatial resolution of 0.2 arcsec (≈55 pc). NGC5419 has a large depleted stellar core with a radius of 1.58 arcsec (430 pc). HST and SINFONI images show a point source located at the galaxy's photocentre, which is likely associated with the low-luminosity AGN previously detected in NGC5419. Both the HST and SINFONI images also show a second nucleus, off-centred by 0.25 arcsec (≈70 pc). Outside of the central double nucleus, we measure an almost constant velocity dispersion of σ∼350 km/s. In the …