A Multiple-star Combined Solution Program - Application to the Population II Binary μ Cas

Details A Multiple-star Combined Solution Program - Application to the Population II Binary μ Cas A Multiple-star Combined Solution Program - Application to the Population II Binary μ Cas

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.4709g&link_type=abstract

American Astronomical Society, 198th AAS Meeting, #47.09; Bulletin of the American Astronomical Society, Vol. 33, p.850

Astronomy and Astrophysics

Astronomy

12

Scientific paper

A multiple-star combined-solution computer program which can simultaneously fit astrometric, speckle, and spectroscopic data, and solve for the orbital parameters, parallax, proper motion, and masses has been written and is now publicly available. Some features of the program are the ability to scale the weights at run time, hold selected parameters constant, handle up to five spectroscopic subcomponents for the primary and the secondary each, account for the light travel time across the system, account for apsidal motion, plot the results, and write the residuals in position to a standard file for further analysis. The spectroscopic subcomponent data can be represented by reflex velocities and/or by independent measurements. A companion editing program which can manage the data files is included in the package. The program has been applied to the Population II binary μ Cas to derive improved masses and an estimate of the primordial helium abundance. The source code, executables, sample data files, and documentation for OpenVMS and Unix, including Linux, are available at http://www.chara.gsu.edu/\rlap\ \ gudehus/binary.html.

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