# Confirmation of the planet hypothesis for the long-period radial velocity variations of β Geminorum

@article{Hatzes2006ConfirmationOT,
title={Confirmation of the planet hypothesis for the long-period radial velocity variations of $\beta$ Geminorum},
author={A. P. Hatzes and William D. Cochran and Moritz Guenther and Steven H. Saar and G. A. H. Walker and S. Yang and Michael Hartmann and Massimiliano Esposito and Diane Beverly Paulson},
journal={Astronomy and Astrophysics},
year={2006},
volume={457},
pages={335-341}
}
• Published 21 June 2006
• Physics, Geology
• Astronomy and Astrophysics
Aims. Our aim is to confirm the nature of the long period radial velocity measurements for β Gem first found by Hatzes & Cochran (1993). Methods. We present precise stellar radial velocity measurements for the K giant star β Gem spanning over 25 years. An examination of the Ca II K emission, spectral line shapes from high resolution data ($R = 210\,000$), and Hipparcos photometry was also made to discern the true nature of the long period radial velocity variations. Results. The radial velocity…
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## References

SHOWING 1-10 OF 32 REFERENCES

### Precise radial velocities with BOES : Detection of low-amplitude pulsations in the K-giant α arietis

• Physics
• 2006
We present the first results from a high-precision radial velocity study of the K2 III giant star α Ari. Observations were acquired over 6 nights in 2004 using the new high-resolution spectrograph

### A LOW-AMPLITUDE PERIODICITY IN THE RADIAL VELOCITY AND CHROMOSPHERIC EMISSION OF BETA GEMINORUM

• Physics, Geology
• 1993
Using high-quality spectra obtained with the hydrogren fluoride technique at the Canada-France-Hawaii 3.6-meter telescope and Dominion Astrophysical Observatory 1.22-meter telescope, we have detected

### Precise radial velocities with BOES

• Physics
• 2006
We present the first results from a high-precision radial velocity study of the K2 III giant star α Ari. Observations were acquired over 6 nights in 2004 using the new high-resolution spectrograph

### A giant planet around the massive giant star HD 13189

• Physics, Geology
• 2005
Most extrasolar planet discoveries using radial velocity measurements have been for solar-like G-stars. In order to understand better the role stellar mass for the formation of planets we must learn

### A substellar companion around the intermediate-mass giant star HD 11977

• Physics, Geology
• 2005
We report the discovery of a substellar companion to the intermediate-mass star HD 11977 (G5 III). Radial velocities of this star have been monitored for five years with FEROS at the 1.52-m ESO and

### Long-Period Radial Velocity Variations in Three K Giants

• Physics, Geology
• 1993
Precise relative radial velocities (σ∼20 m s −1 ) are presented for three K giants: α Tau, α Boo, and β Gem. The data reveal periods of 233 days for α Boo, 643 days for α Tau, and 558 days for β Gem.

### Searching for Planets in the Hyades. II. Some Implications of Stellar Magnetic Activity

• Physics, Geology
• 2002
The Hyades constitute a homogeneous sample of stars ideal for investigating the dependence of planet formation on the mass of the central star. Because of their youth, Hyades members are much more

### Discovery of a Substellar Companion to the K2 III Giant ι Draconis

• Physics, Geology
• 2002
We report precise radial velocity measurements of the K giant ι Dra (HD 137759, HR 5744, HIP 75458), carried out at Lick Observatory, which reveal the presence of a substellar companion orbiting the

### Evidence of a sub-stellar companion around HD 47536

• Physics, Geology
• 2003
We report evidence of a low-mass companion around the K1III giant star HD 47536. This star belongs to our sample of 83 subgiant and giant stars studied for their radial velocity variations using the

### A Planetary Companion to the G-Type Giant Star HD 104985

• Physics, Geology
• 2003
We report the detection of a planetary-mass companion to the G9 III giant star HD 104985 from precise Doppler velocity measurements made using the High Dispersion Echelle Spectrograph (HIDES) at