Reconstructing Galaxy Orbits And Measuring Proper Motions From SIM.

Details Reconstructing Galaxy Orbits And Measuring Proper Motions From SIM. Reconstructing Galaxy Orbits And Measuring Proper Motions From SIM.

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dda....37.1201s&link_type=abstract

American Astronomical Society, DDA meeting #37, #12.01; Bulletin of the American Astronomical Society, Vol. 38, p.673

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There have been numerous improvements to the Numerical Action Method codes for reconstructing orbits with a standard cosmological context over the last 2-3 years. There have also been numerous ( 200) high accuracy distance measurements of nearby galaxies, mostly from application of the TRGB method to HST observations. We will present recent findings on the state of the Local Group and nearby groups, the masses of nearby galaxies and the Virgo Cluster, and limits on hot and warm dark matter.
We will also discuss the potential for using SIM to measure proper motions of nearby galaxies to add 2 more phase-space constraints per galaxy and how this aids in improving solutions and solving for individual masses of galaxies.

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