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}
}
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… 

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 spanning

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 spacing

A substellar component orbiting the F-star 30 Arietis B

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 massive

Planetary companion candidates around the K giant stars 42 Draconis and HD 139 357

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 Landessternwarte

A planetary companion around the K giant Corona Borealis

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 K2

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 temperature

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 80

Precise radial velocities of giant stars VIII. Testing for the presence of planets with CRIRES Infrared Radial Velocities

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 planetary

The Discovery of Stellar Oscillations in the Planet-hosting Giant Star β Geminorum

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 nights

Precise radial velocities of giant stars. IV. A correlation between surface gravity and radial veloc

Context. Since 1999, we have been conducting a radial velocity survey of 179 K giants using the Coude Auxiliary Telescope at UCO/Lick observatory. At present ∼20− 100 measurements have been collected
...

References

SHOWING 1-10 OF 32 REFERENCES

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

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

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

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

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

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

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

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

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

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

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