Search for Jupiter-Mass Companions (Walker+, 1995)

Details Search for Jupiter-Mass Companions (Walker+, 1995) Search for Jupiter-Mass Companions (Walker+, 1995)

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ycat.3185....0w&link_type=abstract

VizieR On-line Data Catalog: III/185. Originally published in: 1995Icar..116..359W

Computer Science

2

Radial Velocities, Planets

Scientific paper

The experimental technique, in which lines of the 870 nm 3-0 vibration-rotation band of hydrogen fluoride are imposed in absorption on the stellar spectra to act as wavelength fiducials, is capable of measuring long-term changes in the velocity of a star with a precision near 15 m/s from a single spectrum. For comparison, the orbit of the Sun about the barycentre, which is dominated by the motion of Jupiter, has a period of 11.9 years with an amplitude of some 13 m/s. Thus, by making several observations per year, we could have detected the reflex motion caused by a Jupiter-mass planet orbiting a nearby star provided the orbital plane was close to the line of sight.
To date, this planetary search has been the only long-term program on the CFHT. Between three and six pairs of nights per year were allocated over twelve years, apart from a single gap of six months in 1983. The 15 m/s precision per observation was achieved to a limiting I magnitude of 4 for exposures of typically less than half an hour. The program was completed in 1992. In the published paper the analysis of the 1082 individual differential velocities that are catalogued here is presented.
(2 data files).

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