Copernicus observations of IOTA Herculis velocity variations

Details Copernicus observations of IOTA Herculis velocity variations Copernicus observations of IOTA Herculis velocity variations

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89.1876r&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 89, Dec. 1984, p. 1876, 1877.

Astronomy and Astrophysics

Astronomy

8

Oao 3, Radial Velocity, Satellite Observation, Stellar Motions, Velocity Measurement, Binary Stars, High Resolution, Line Shape, Periodic Variations, Stellar Spectrophotometry, Variable Stars

Scientific paper

Observations of Iota Her at 109.61-109.67 nm obtained with the U1 channel of the Copernicus spectrophotometer at resolution 5 pm during 3.6 days in May, 1979, are reported. Radial-velocity variations are detected and analyzed as the sum of two sinusoids with frequencies 0.660 and 0.618 cycles/day and amplitudes 9.18 and 8.11 km/s, respectively. Weak evidence supporting the 13.9-h periodicity seen in line-profile variations by Smith (1978) is found.

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