# Precise radial velocities of giant stars

@article{Heeren2018PreciseRV,
title={Precise radial velocities of giant stars},
author={Paul Heeren and Sabine Reffert and Trifon Trifonov and Ka Ho Wong and Man Hoi Lee and Jorge Lillo-Box and Andreas Quirrenbach and Torben Arentoft and Simon H. Albrecht and Frank Grundahl and Mads Fredslund Andersen and Victoria Antoci and Pere L. Pall{\'e}},
journal={Astronomy \& Astrophysics},
year={2018}
}
• Published 10 May 2018
• Physics, Geology
• Astronomy & Astrophysics
Context. Using the Hamilton Échelle Spectrograph at Lick Observatory, we have obtained precise radial velocities (RVs) of a sample of 373 G- and K-giant stars over more than 12 yr, leading to the discovery of several single and multiple planetary systems. The RVs of the long-period (~53 yr) spectroscopic binary ε Cyg (HIP 102488) are found to exhibit additional regular variations with a much shorter period (~291 days). Aims. We intend to improve the orbital solution of the ε Cyg system and…

## Figures and Tables from this paper

Precise radial velocities of giant stars XV. Mysterious nearly periodic radial velocity variations in the eccentric
• Physics, Geology
• 2021
Context. Using the Hamilton Échelle Spectrograph at Lick Observatory, we have obtained precise radial velocities (RVs) of a sample of 373 G- and K-giant stars over more than 12 yr, leading to the
Precise radial velocities of giant stars: IX. HD 59686 Ab: a massive circumstellar planet orbiting a giant star in a ~13.6 au eccentric binary system
• Physics, Geology
• 2016
Context. For over 12 yr, we have carried out a precise radial velocity (RV) survey of a sample of 373 G- and K-giant stars using the Hamilton Echelle Spectrograph at the Lick Observatory. There are,
Tracking Advanced Planetary Systems (TAPAS) with HARPS-N
• Physics, Geology
Astronomy & Astrophysics
• 2021
Context. We present the current status of and new results from our search for exoplanets in a sample of solar-mass evolved stars observed with the HARPS-N and the 3.6 m Telescopio Nazionale Galileo
Precise radial velocities of giant stars. XVI. Planet occurrence rates from the combined analysis of the Lick, EXPRESS, and PPPS giant star surveys
• Physics, Geology
Astronomy &amp; Astrophysics
• 2022
Context. Radial velocity surveys of evolved stars allow us to probe a higher stellar mass range, on average, compared to main-sequence samples. Hence, di ﬀ erences between the planet populations
A photospheric and chromospheric activity analysis of the quiescent retrograde-planet host ν Octantis A
• Physics, Geology
• 2021
The single-lined spectroscopic binary ν Octantis provided evidence of the first conjectured circumstellar planet demanding an orbit retrograde to the stellar orbits. The planet-like behaviour is now
Pollux: A weak dynamo-driven dipolar magnetic field and implications for its probable planet
• Physics
Astronomy & Astrophysics
• 2021
Context. Pollux is considered as an archetype of a giant star hosting a planet since its radial velocity (RV) presents very stable sinusoidal variations with a period of about 590 d. We then
A Sanity Check for Planets around Evolved Stars
• Physics, Geology
The Astrophysical Journal Supplement Series
• 2021
We present the radius–period plot for exoplanet candidates around giant stars. The diagram contains two distinct regions. While planets of giants with radii smaller than 21 R ⊙ exhibit a wide range
A Radial Velocity Study of the Planetary System of π Mensae: Improved Planet Parameters for π Mensae c and a Third Planet on a 125 Day Orbit
• Physics, Geology
The Astronomical Journal
• 2022
π Men hosts a transiting planet detected by the Transiting Exoplanet Survey Satellite space mission and an outer planet in a 5.7 yr orbit discovered by radial velocity (RV) surveys. We studied this
Weighing stars from birth to death: mass determination methods across the HRD
• Physics, Geology
The Astronomy and Astrophysics Review
• 2021
The mass of a star is the most fundamental parameter for its structure, evolution, and final fate. It is particularly important for any kind of stellar archaeology and characterization of exoplanets.
Li-rich K giants, dust excess, and binarity
• Physics
• 2020
The origin of the Li-rich K giants is still highly debated. Here, we investigate the incidence of binarity among this family from a nine-year radial-velocity monitoring of a sample of 11 Li-rich K

## References

SHOWING 1-10 OF 288 REFERENCES
Precise radial velocities of giant stars. IV. A correlation between surface gravity and radial veloc
• Physics, Geology
• 2008
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
Detection of a planetary companion around the giant star γ1 Leonis
• Physics, Geology
• 2010
Aims. Our primary goal is to search for planets around intermediate mass stars. We are also interested in studying the nature of radial velocity (RV) variations of K giant stars. Methods. We selected
Precise radial velocities of giant stars: IX. HD 59686 Ab: a massive circumstellar planet orbiting a giant star in a ~13.6 au eccentric binary system
• Physics, Geology
• 2016
Context. For over 12 yr, we have carried out a precise radial velocity (RV) survey of a sample of 373 G- and K-giant stars using the Hamilton Echelle Spectrograph at the Lick Observatory. There are,
Precise Radial Velocities of Giant Stars. II. Pollux and Its Planetary Companion
• Physics, Geology
• 2006
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 I. Stable stars
• Physics, Geology
• 2006
Context. Future astrometric missions such as SIM PlanetQuest need very stable reference stars. K giants have large luminosities, which place them at large distances and thus the jitter of their
Precise radial velocity measurements of G and K giants. Multiple systems and variability trend along the Red Giant Branch
• Physics
• 2004
We present the results of our radial velocity (RV) measurements of G and K giants, concentrating on the presence of multiple systems in our sample. Eighty-three giants have been observed for 2.5
Discovery of a planet around the K giant star 4 Ursae Majoris
• Physics, Geology
• 2007
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. We
Precise radial velocities of giant stars XIII. A second Jupiter orbiting in 4:3 resonance in the
• Physics, Geology
• 2019
We report the discovery of a second planet orbiting the K giant star 7 CMa based on 166 high-precision radial velocities obtained with Lick, HARPS, UCLES, and SONG. The periodogram analysis reveals
Precise radial velocities of giant stars - VI. A possible 2:1 resonant planet pair around the K giant star η Ceti
• Physics, Geology
• 2014
We report the discovery of a new planetary system around the K giant $\eta$ Cet (HIP 5364, HD 6805) based on 118 high-precision optical radial velocities taken at Lick Observatory since July 2000.
Precise radial velocities of giant stars XII. Evidence against the proposed planet Aldebaran b (cid:63)
• Physics, Geology
Context. Radial-velocity variations of the K giant star Aldebaran ( α Tau) were ﬁrst reported in the early 1990s. After subsequent analyses, the radial-velocity variability with a period of ∼ 629d