A compact system of small planets around a former red-giant star

@article{Charpinet2011ACS,
  title={A compact system of small planets around a former red-giant star},
  author={St{\'e}phane Charpinet and Gilles Fontaine and Pierre Brassard and Elizabeth M. Green and Val{\'e}rie Van Grootel and Suzanna K. Randall and Roberto Silvotti and Andrzej S. Baran and Roy {\O}stensen and Steven D. Kawaler and John H. Telting},
  journal={Nature},
  year={2011},
  volume={480},
  pages={496-499}
}
Planets that orbit their parent star at less than about one astronomical unit (1 au is the Earth–Sun distance) are expected to be engulfed when the star becomes a red giant. Previous observations have revealed the existence of post-red-giant host stars with giant planets orbiting as close as 0.116 au or with brown dwarf companions in tight orbits, showing that these bodies can survive engulfment. What has remained unclear is whether planets can be dragged deeper into the red-giant envelope… 

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References

SHOWING 1-10 OF 46 REFERENCES

A giant planet orbiting the ‘extreme horizontal branch’ star V 391 Pegasi

The detection of a planet orbiting a post-red-giant star demonstrates that planets with orbital distances of less than 2 au can survive the red-Giant expansion of their parent stars.

A Giant Planet Around a Metal-Poor Star of Extragalactic Origin

The detection of a close-in giant planet around a metal-poor star belonging to a group of stars that formed in a satellite galaxy of the Milky Way, which most likely has an extragalactic origin.

Survival of a brown dwarf after engulfment by a red giant star

The discovery of a brown dwarf in a short period orbit around a white dwarf is reported and the properties of both stars can be directly observed and show that the brown dwarf was engulfed by a red giant but that this had little effect on it.

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

Evaporation rate of hot Jupiters and formation of Chthonian planets

Among the hundred of known extrasolar planets, about 15% are closer than 0.1 AU from their parent stars. But there are extremely few detections of planets orbiting in less than 3 days. At this limit

Can Planets Influence the Horizontal Branch Morphology?

I examine the influence of planets on the location of stars on the Hertzsprung-Russel diagram as the stars turn to the horizontal branch. As stars that have planetary systems evolve along the red

A planetary system around the millisecond pulsar PSR1257 + 12

MILLISECOND radio pulsars, which are old (∼109yr), rapidly rotating neutron stars believed to be spun up by accretion of matter from their stellar companions, are usually found in binary systems with

Connecting planets around horizontal branch stars with known exoplanets

We study the distribution of exoplanets around main-sequence stars and apply our results to the binary model for the formation of extreme horizontal branch (EHB; sdO; sdB; hot subdwarfs) stars. By

The changing phases of extrasolar planet CoRoT-1b

Optical photometric data obtained over 36 planetary orbits of the transiting hot Jupiter CoRoT-1b are consistent with the nightside hemisphere of the planet being entirely black, with the dayside flux dominating the optical phase curve.

A map of the day–night contrast of the extrasolar planet HD 189733b

Observations of HD 189733, the closest of these eclipsing planetary systems, over half an orbital period are reported, from which a ‘map’ of the distribution of temperatures is constructed, indicating that energy from the irradiated dayside is efficiently redistributed throughout the atmosphere.