Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10197h&link_type=abstract
HST Proposal ID #10197
Astronomy and Astrophysics
Astrophysics
Hst Proposal Id #10197 Stellar Populations
Scientific paper
Little is currently known concerning the mass-luminosity relation {MLR} of Population II stars. In Cycle 10, we began an initial study with FGS1 to resolve a sample of known spectroscopic binaries preselected as high-velocity and/or low metallicity objects. This has resulted in significant new information about the astrophysical parameters of metal-poor stars, but was limited mainly to intermediate metallicities, not to true Population II stars. A new sample of metal-poor spectroscopic binaries identified by Latham and his collaborators {e.g. Latham et al 2002} contains three new very metal-poor objects resolvable with FGS. We propose to observe these binaries and obtain additional observations of two very important resolved targets from our initial sample. As with that program, we will couple the already-known spectroscopic orbits with astrometric information which only FGS can deliver at present. To ensure that the most will be gained from these data, we als o request observations of three metal-poor single stars to be used as calibration objects. In combination with results from our previous program, these observations can be expected to resolve the question of the location of the Population II main sequence and give valuable insight into the accuracy of isochrone fitting for determination of globular clusters ages. Due to the combination of target magnitudes and expected separations, no object in this sample can be resolved without the unique capabilities of FGS.
No associations
LandOfFree
The Astrophysical Parameters of Very Metal-Poor Halo Binaries 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 Astrophysical Parameters of Very Metal-Poor Halo Binaries, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Astrophysical Parameters of Very Metal-Poor Halo Binaries will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1011081