Statistics – Methodology
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009pobeo..86..161s&link_type=abstract
Publications of the Astronomical Observatory of Belgrade, vol. 86, pp. 161-166
Statistics
Methodology
Scientific paper
In this contribution I discuss the problem of the mass-to-light ratio in early-type galaxies. The observational evidence based on different and independent techniques suggest that interior to ˜ 3R_{e} (where R_{e} is the effective radius) from the center of these galaxies dark matter does not play important dynamical role and the mass is dominated by the visible, stellar component. The long-slit spectra observations enable us to deduce the full line-of-sight velocity distribution of a given galaxy, but are limited to ˜ 3-4R_{e}. Fortunately, the kinematics can also be inferred beyond this limit using planetary nebulae (PNe) and globular clusters (GCs), but the anisotropies of orbits in this approach are not well constrained. I will show that some hints can nevertheless be obtained even using small samples available at this stage. Finally, I will use the X-rays methodology to infer the mass-to-light ratios in different early-type galaxies and to compare the results obtained with the aforementioned techniques while emphasizing the problems inherent in this methodology (e.g. possible lack of hydrostatic equilibrium).
No associations
LandOfFree
The Problem of the Mass-to-Light Ratio in Early-Type Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Problem of the Mass-to-Light Ratio in Early-Type Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Problem of the Mass-to-Light Ratio in Early-Type Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1074745