Detecting Binary Stars from High Precision Radial Velocity Observations in the Open Cluster NGC 752

Details Detecting Binary Stars from High Precision Radial Velocity Observations in the Open Cluster NGC 752 Detecting Binary Stars from High Precision Radial Velocity Observations in the Open Cluster NGC 752

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541701w&link_type=abstract

American Astronomical Society, AAS Meeting #215, #417.01; Bulletin of the American Astronomical Society, Vol. 42, p.271

Astronomy and Astrophysics

Astronomy

Scientific paper

Stars in the open cluster NGC 752 have been examined for radial velocity variations using the ensemble technique. The observations consist of 10 nights of spectroscopy of 75 main sequence stars using the Hydra multi-fiber spectrograph at the WIYN 3.5-m telescope at Kitt Peak. Spectra were obtained using the echelle grating centered at 5200A and provide a typical radial velocity precision of 200 m/s. Each star's relative velocity was measured by cross-correlation of its spectrum against the average of known, non-variable stars in the cluster. Almost half of the sample appear to be variable in radial velocity, including the majority of the stars with B-V < 0.5. The velocity variables possibly include both pulsating stars of F spectral type and binary stars.
This work was carried out through the NSF-funded REU program at Indiana University, supported by the National Science Foundation under grant AST-0452975.

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