# 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 Gordon Arthur Hunter 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}
}
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… Expand
96 Citations

#### Figures and Tables from this paper

Long-lived, long-period radial velocity variations in Aldebaran: A planetary companion and stellar activity
We investigate the nature of the long-period radial velocity variations in Alpha Tau first reported over 20 years ago. We analyzed precise stellar radial velocity measurements for Alpha Tau spanningExpand
The mass of the planet-hosting giant star β Geminorum determined from its p-mode oscillation spectrum
Aims. Our aim is to use precise radial velocity measurements and photometric data to derive the frequency spacing of the p-mode oscillation spectrum of the planet-hosting star β Gem. This spacingExpand
Discovery of a planet around the K giant star 4 Ursae Majoris
For the past 3 years we have been monitoring a sample of 62 K giant stars using precise stellar radial velocity measurements with high accuracy taken at the Thuringer Landessternwarte Tautenburg. WeExpand
A substellar component orbiting the F-star 30 Arietis B
• Physics
• 2009
Context. Most current radial velocity planet search programs have concentrated on stars of one solar mass. Our knowledge on the frequency of giant planets and brown dwarf companions to more massiveExpand
Planetary companion candidates around the K giant stars 42 Draconis and HD 139 357
• Physics
• 2009
Context. For the past 3 years we have been monitoring 62 K giant stars using precise stellar radial velocity (RV) measurements with the 2 m Alfred Jensch Telescope of the Thuringer LandessternwarteExpand
A planetary companion around the K giant Corona Borealis
• Physics, Geography
• 2012
Aims. Our aim is to search for and study the origin of the low-amplitude and long-periodic radial velocity (RV) variations in K giants. Methods. We present high-resolution RV measurements of K2Expand
THE STABLE K0 GIANT STAR β GEM
A nine-season spectroscopic study of the photosphere of β Gem (K0 III) shows this low-luminosity giant to be stable, with no effective temperature variations above ~2 K, and no secular temperatureExpand
Precise radial velocities of giant stars. II. Pollux and its planetary companion
It has long been speculated that the observed periodic radial velocity pattern for the K giant Pollux might be explained in terms of an orbiting planetary companion. We have collected 80Expand
Precise radial velocities of giant stars VIII. Testing for the presence of planets with CRIRES Infrared Radial Velocities
• Physics
• 2015
We have been monitoring 373 very bright (V < 6 mag) G and K giants with high precision optical Doppler spectroscopy for more than a decade at Lick Observatory. Our goal was to discover planetaryExpand
The Discovery of Stellar Oscillations in the Planet-hosting Giant Star β Geminorum
• Physics
• 2007
We present the results of a long time series of precise stellar radial velocity measurements of the planet hosting K giant star β Geminorum. A total of 20 hr of observations spanning three nightsExpand

#### 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 spectrographExpand
A low-amplitude periodicity in the radial velocity and chromospheric emission of beta Geminorum
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 detectedExpand
• 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 spectrographExpand
A giant planet around the massive giant star HD 13189
• Physics
• 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 learnExpand
A substellar companion around the intermediate-mass giant star HD 11977
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 andExpand
Long-Period Radial Velocity Variations in Three K Giants
• Physics
• 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.Expand
Discovery of a Substellar Companion to the K2 III Giant ι Draconis
• Physics
• 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 theExpand
Searching for Planets in the Hyades. II. Some Implications of Stellar Magnetic Activity
• Physics
• 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 moreExpand
Discovery of a planetary companion to the G-type giant star HD 104985
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) atExpand
Evidence of a sub-stellar companion around HD 47536
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 theExpand