The properties of planets around giant stars

@article{Jones2014ThePO,
  title={The properties of planets around giant stars},
  author={M. I. Jones and James S. Jenkins and P. Bluhm and Patricio M. Rojo and Claudio Melo},
  journal={Astronomy and Astrophysics},
  year={2014},
  volume={566}
}
Context: More than 50 exoplanets have been found around giant stars, revealing different properties when compared to planets orbiting solar-type stars. In particular, they are Super-Jupiters and are not found orbiting interior to $\sim$ 0.5 AU. Aims: We are conducting a radial velocity study of a sample of 166 giant stars aimed at studying the population of close-in planets orbiting giant stars and how their orbital and physical properties are influenced by the post-MS evolution of the host… 

Figures and Tables from this paper

Four new planets around giant stars and the mass-metallicity correlation of planet-hosting stars

Context. Exoplanet searches have revealed interesting correlations between the stellar properties and the occurrence rate of planets. In particular, different independent surveys have demonstrated

A hot Saturn on an eccentric orbit around the giant star EPIC228754001

Although the majority of radial velocity detected planets have been found orbiting solar-type stars, a fraction of them have been discovered around giant stars. These planetary systems have revealed

A planetary system and a highly eccentric brown dwarf around the giant stars HIP67851 and HIP97233

Context: So far more than 60 substellar companions have been discovered around giant stars. These systems present physical and orbital properties that contrast to those detected orbiting less evolved

Giant planets around two intermediate-mass evolved stars and confirmation of the planetary nature of HIP 67851c

Context. Precision radial velocities are required to discover and ch aracterize planets orbiting nearby stars. Optical and near infrared spectra that exhibit many hundreds of absorption lines can

Precise Radial Velocities of Giant Stars VII. Occurrence Rate of Giant Extrasolar Planets as a Function of Mass and Metallicity

(abridged) We have obtained precise radial velocities for a sample of 373 G and K type giants at Lick Observatory regularly over more than 12 years. Planets have been identified around 15 giant

A Sanity Check for Planets around Evolved Stars

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

Four Jovian planets around low-luminosity giant stars observed by the EXPRESS and PPPS

We report the discovery of planetary companions orbiting four low-luminosity giant stars with M⋆ between 1.04 and 1.39 M⊙. All four host stars have been independently observed by the EXoPlanets

SPECIES II. Stellar parameters of the EXPRESS program giant star sample

As part of the search for planets around evolved stars, we can understand planet populations around significantly higher-mass stars than the Sun on the main sequence. This population is difficult to

A Jovian planet in an eccentric 11.5 day orbit around HD 1397 discovered by TESS

The Transiting Exoplanet Survey Satellite TESS has begun a new age of exoplanet discoveries around bright host stars. We present the discovery of HD 1397b (TOI-120.01), a giant planet in an 11.54-day

New planetary systems from the Calan-Hertfordshire Extrasolar planet search

We report the discovery of eight new giant planets, and updated orbits for four known planets, orbiting dwarf and subgiant stars using the CORALIE, HARPS, and MIKE instruments as part of the
...

References

SHOWING 1-10 OF 57 REFERENCES

Study of the impact of the post-MS evolution of the host star on the orbits of close-in planets - I. Sample definition and physical properties

Context. To date, more than 30 planets have been discovered around giant stars, but only one of them has been found to be orbiting within 0.6 AU from the host star, in direct contrast to what is

Planets around evolved intermediate-mass stars. I. Two substellar companions in the open clusters NG

Context. Many efforts are being made to characterize extrasolar planetary systems and unveil the fundamental mechanisms of planet formation. An important aspect of the problem, which remains largely

RETIRED A STARS AND THEIR COMPANIONS. III. COMPARING THE MASS–PERIOD DISTRIBUTIONS OF PLANETS AROUND A-TYPE STARS AND SUN-LIKE STARS

We present an analysis of ∼5 years of Lick Observatory radial velocity measurements targeting a uniform sample of 31 intermediate-mass (IM) subgiants (1.5 ≲ M*/M☉≲ 2.0) with the goal of measuring the

Evolved stars suggest an external origin of the enhanced metallicity in planet-hosting stars

Aims. Exo-planets are preferentially found around high metallicity main sequence stars. We aim at investigating whether evolved stars share this property, and what this tells about planet formation.

PLANET ENGULFMENT BY ∼1.5–3 M☉ RED GIANTS

Recent radial-velocity surveys for GK clump giants have revealed that planets also exist around ∼1.5–3 M☉ stars. However, no planets have been found inside 0.6 AU around clump giants, in contrast to

Kepler-91b: a planet at the end of its life - Planet and giant host star properties via light-curve variations

Context. The evolution of planetary systems is intimately linked to the evolution of their host star. Our understanding of the whole planetary evolution process is based on the large planet diversity

“RETIRED” PLANET HOSTS: NOT SO MASSIVE, MAYBE JUST PORTLY AFTER LUNCH

Studies of the planet abundance as a function of stellar mass have suggested a strong increase in the frequency of planet occurrence around stars more massive than 1.5 M☉, and that such stars are

No evidence of the planet orbiting the extremely metal-poor extragalactic star HIP 13044

Context. The recent discovery of three giant planets orbiting the extremely metal-poor stars HIP 11952 and HIP 13044 have challenged theoretical predictions of the core-accretion model. According to

The Planet-Metallicity Correlation

We have recently carried out spectral synthesis modeling to determine Teff, log g, v sin i, and [Fe/H] for 1040 FGK-type stars on the Keck, Lick, and Anglo-Australian Telescope planet search

THE ORBITAL EVOLUTION OF GAS GIANT PLANETS AROUND GIANT STARS

Recent surveys have revealed a lack of close-in planets around evolved stars more massive than 1.2 M☉. Such planets are common around solar-mass stars. We have calculated the orbital evolution of
...