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Full-Text Articles in Physical Sciences and Mathematics
The Self-Calibration Method For Multiple Systems At The Chara Array, David P. O'Brien
The Self-Calibration Method For Multiple Systems At The Chara Array, David P. O'Brien
Physics and Astronomy Dissertations
The self-calibration method, a new interferometric technique using measurements in the K′-band (2.1 μm) at the CHARA Array, has been used to derive orbits for several spectroscopic binaries. This method uses the wide component of a hierarchical triple system to calibrate visibility measurements of the triple’s close binary system through quasi-simultaneous observations of the separated fringe packets of both. Prior to the onset of this project, the reduction of separated fringe packet data had never included the goal of deriving visibilities for both fringe packets, so new data reduction software has been written. Visibilities obtained with separated fringe packet data …
The Separated Fringe Packet Survey: Updating Multiplicity Of Solar-Type Stars Within 22 Parsecs, Christopher Donald Farrington
The Separated Fringe Packet Survey: Updating Multiplicity Of Solar-Type Stars Within 22 Parsecs, Christopher Donald Farrington
Physics and Astronomy Dissertations
Over the past half century, multiplicity studies have provided a foundation for the theories of stellar formation and evolution through understanding how likely it is that stars form alone or with companions. If spectroscopic orbits are combined with techniques that can determine visual orbits, we can access the most fundamental parameter of stellar evolution, stellar mass. This dissertation is composed of two main sections. The first involves the investigation of the seminal multiplicity study of Duquennoy & Mayor (1991b) which has been the ``gold standard" for solar-type stars for nearly 20 years. Improvements in technology in the intervening years have …