Radial velocities of gamma Cas (Nemravov+, 2012)

Details Radial velocities of gamma Cas (Nemravov+, 2012) Radial velocities of gamma Cas (Nemravov+, 2012)

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ycat..35379059n&link_type=abstract

VizieR On-line Data Catalog: J/A+A/537/A59. Originally published in: 2012A&A...537A..59N

Physics

Stars: Be, Binaries: Spectroscopic, Radial Velocities

Scientific paper

RVs were measured by sliding of direct and mirrored line profile in radial-velocity until the best match was achieved. This was done manually with the program SPEFO written by Dr. Jiri Horn and automatically with a program written by Dr. A. Miroshnichenko.
Gamma Cassiopeiae shows long-term radial-velocity changes. In order to study variations on shorter timescales one has to remove the long-term variations. We splitted measured RVs into subsets covering time interval of up to 3 orbital periods P=203.52d. We fitted RVs in a subsets with Keplerian curve and derived systemic velocity for each subset. We fitted these systemic velocities with Hermite polynomials and substracted the model curve from measured RVs.
(2 data files).

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