Models of the Dark Halo and Central Black Hole of Elliptical Galaxy NGC 4697

Details Models of the Dark Halo and Central Black Hole of Elliptical Galaxy NGC 4697 Models of the Dark Halo and Central Black Hole of Elliptical Galaxy NGC 4697

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21534706f&link_type=abstract

American Astronomical Society, AAS Meeting #215, #347.06; Bulletin of the American Astronomical Society, Vol. 42, p.529

Astronomy and Astrophysics

Astronomy

Scientific paper

We present axisymmetric orbit-superposition dynamical models of elliptical galaxy NGC 4697. At large radii we use planetary nebulae kinematics from Mendez et al. (2001, 2008, 2009) and in the center we use stellar kinematics from Pinkney et al. (2003). The models are used to find the best-fitted stellar mass-to-light ratio, central black hole mass, and dark halo parameters. We find that the galaxy is best-fitted with a logarithmic potential dark halo with circular velocity of 387.5 km/s. Our black hole mass, 2.1E8 Msun, is consistent with the previous black hole mass obtained with central data only and no dark halo included (Gebhardt et al. 2003). We find that our best-fitted model shows radial anisotropy at large radii, where the planetary nebulae are located.

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