The PN.S Elliptical Galaxy Survey: a standard LCDM halo around NGC 4374?

Understand

As part of our current programme to test LCDM predictions for dark matter (DM) haloes using extended kinematical observations of early-type galaxies, we present a dynamical analysis of the bright elliptical galaxy NGC 4374 (M84) based on ~450 Planetary Nebulae (PNe) velocities from the PN.Spectrograph, along with extended long-slit stellar kinematics.

• This is the first such analysis of a galaxy from our survey with a radially constant velocity dispersion profile.
• We find that the spatial and kinematical distributions of the PNe agree with the field stars in the region of overlap.
• The velocity kurtosis is consistent with zero at almost all radii.