Radial velocities of the composite spectrum binary Alpha Equulei

Details Radial velocities of the composite spectrum binary Alpha Equulei Radial velocities of the composite spectrum binary Alpha Equulei

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.252...68r&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 252, Sept. 1, 1991, p. 68-71. Research supported by NSE

Astronomy and Astrophysics

Astrophysics

6

A Stars, Binary Stars, G Stars, Radial Velocity, Stellar Spectra, Astronomical Photography, Giant Stars, Main Sequence Stars, Stellar Mass

Scientific paper

High-dispersion (2.4 A/mm) photographic spectra of the composite spectrum binary Alpha Equulei were reduced to radial velocities at the Dominion Astrophysical Observatory using the Arcturus measuring machine for the G-component's spectrum, and a radial velocity cross-correlation package within the Image Reduction and Analysis Facility for the A component's spectrum. It was found that subtraction of the G star before cross-correlation gave consistently better results than cross-correlation alone. The velocities were used to derive a new radial velocity curve and to calculate new orbital elements. It was determined that the mass ratio MG/MA is equal to 1.149 + or - 0.046.

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