Photometric Followup of Space Interferometry Mission Grid Giant Star Candidates

Details Photometric Followup of Space Interferometry Mission Grid Giant Star Candidates Photometric Followup of Space Interferometry Mission Grid Giant Star Candidates

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002noao.prop..241g&link_type=abstract

NOAO Proposal ID #2002B-0241

Astronomy and Astrophysics

Astronomy

Scientific paper

We have been awarded a NASA grant to obtain followup photometry of the Grid Giant Star Survey (GGSS) candidates we are establishing in our Space Interferometry Mission (SIM) Preparatory Science program. The GGSS will yield ~ 4000 metal-poor G-K giants as SIM Astrometric Grid candidates, based on single-epoch photometry and low resolution spectroscopy. %(being obtained at LCO). Multi-epoch photometric followup observations of these candidates are essential for verifying their photometric stability and thus guaranteeing their utility as SIM Grid stars. We propose here to continue our followup photometric observations which started in late 2000. These data are not only critical for the SIM project but will also allow us to improve our very limited knowledge of binary and planetary frequency in metal-poor giants. Because the kinematic properties of these stars will eventually be determined to unprecedented accuracy, a detailed understanding of their characteristics will not only be important for the SIM project, but also crucial for future studies of the GGSS database. These observations will greatly improve our knowledge of the atmospheric parameters of the Grid stars.

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