Other
Scientific paper
Feb 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009noao.prop..161g&link_type=abstract
NOAO Proposal ID #2009A-0161
Other
Scientific paper
``Anomalous'' stars, such as blue stragglers and more recently sub- subgiants, have been an enduring challenge for stellar evolution theory. Recently it has become clear that in star clusters these systems are closely linked to the binary star populations. Furthermore, through advances in N-body modeling, we have come to realize that stellar dynamical processes play a central role in the formation of such anomalous stars. Indeed, these stars trace the interface between the classical fields of stellar evolution and stellar dynamics. We propose a thesis study to directly probe this interface through high-precision radial-velocity measurements of the anomalous stars and the binary populations in four open clusters. We have selected NGC 188 (7 Gyr), M67 (NGC 2682; 4 Gyr), NGC 6819 (2.4 Gyr), and M35 (NGC 2168; 150 Myr), as these span a wide range in age, are rich enough to provide statistically significant conclusions, and already have an extensive base of kinematic, spectroscopic, and photometric observations from the WIYN Open Cluster Study. Our proposed observations will define the spectroscopic hard binary populations (fraction, frequency distributions of orbital parameters, mass ratios) for orbital periods approaching the hard-soft boundary. These observations will also provide a comprehensive survey for anomalous stars, including secure establishment of their cluster membership. These data will allow us to perform the first detailed comparison to predictions from open cluster simulations of the binary populations among normal and anomalous stars, and thereby to constrain the evolutionary paths from one to the other.
Geller Aaron M.
Gosnell Natalie
Latham David W.
Mathieu Robert D.
No associations
LandOfFree
A Study Of Anomalous Stars and Binary Populations Within Open Clusters: Tests Of Theoretical Models 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 A Study Of Anomalous Stars and Binary Populations Within Open Clusters: Tests Of Theoretical Models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Study Of Anomalous Stars and Binary Populations Within Open Clusters: Tests Of Theoretical Models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1244647