Planetary Nebulae Beyond the Milky Way pp 324-328 | Cite as
Planetary Nebulae as Dynamical Tracers: Mass-to-Light-Ratio Gradients in Early-Type Galaxies
Conference paper
Abstract
Planetary Nebulae (PNe) have enabled mass-to-light ratios (M/L) in earlytype galaxies to be constrained to unprecedented distance from the center, showing in some cases clear evidence of increasing M/L, in other cases fairly constant M/L. We combine the information obtained from PN kinematics with radially extended long-slit spectroscopy data in order to constrain the M/L trends in a heterogeneous sample of early-type galaxies. We discuss whether these trends are expected in the ΛCDM framework of galaxy formation.
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