Short period variations in IOTA Herculis

Details Short period variations in IOTA Herculis Short period variations in IOTA Herculis

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...176..255c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 176, no. 2, April 1987, p. 255-261.

Astronomy and Astrophysics

Astrophysics

19

B Stars, Early Stars, Stellar Spectra, Stellar Spectrophotometry, Variable Stars, Radial Velocity, Ultraviolet Radiation

Scientific paper

Spectrographic and photometric observations of the B type variable star ι Herculis are presented. A short period variation is detected in the photometric data. The amplitude is around 0.01 mag in a UV filter and the period equal to 0.12 or 0.14 day. The same time scale is present in the variations of radial velocity data and line intensity ratio. However the main feature in the radial velocity curve is a trend over a longer time scale. The relation of ι Herculis with the β CMa group is discussed. The authors confirm the existence of short period variations outside the instability strip towards lower temperatures.

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