Aldebaran b’s Temperate Past Uncovered in Planet Search Data

@article{Farr2018AldebaranBT,
  title={Aldebaran b’s Temperate Past Uncovered in Planet Search Data},
  author={Will M. Farr and Benjamin J. S. Pope and Guy R. Davies and Thomas S. H. North and Timothy R. White and Jim W. Barrett and Andrea Miglio and Mikkel N. Lund and Victoria Antoci and Mads Fredslund Andersen and Frank Grundahl and Daniel Huber},
  journal={The Astrophysical Journal Letters},
  year={2018},
  volume={865}
}
  • W. Farr, B. Pope, D. Huber
  • Published 27 February 2018
  • Physics, Geology
  • The Astrophysical Journal Letters
The nearby red giant Aldebaran is known to host a gas giant planetary companion from decades of ground-based spectroscopic radial velocity measurements. Using Gaussian Process-based Continuous Auto-Regressive Moving Average models, we show that these historic data also contain evidence of acoustic oscillations in the star itself, and verify this result with further dedicated ground-based spectroscopy using the SONG telescope and space-based photometry with the Kepler Space Telescope. From the… 
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13 Citations
Background Citations
5
Methods Citations
4
Results Citations
1

13 Citations

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Asteroseismology of iota Draconis and Discovery of an Additional Long-period Companion
Giant stars as known exoplanet hosts are relatively rare due to the potential challenges in acquiring precision radial velocities and the small predicted transit depths. However, these giant host…
Techniques for Finding Close-in, Low-mass Planets around Evolved Intermediate-mass Stars
Jupiter-mass planets with large semimajor axes (a > 1.0 au) occur at a higher rate around evolved intermediate-mass stars. There is a pronounced paucity of close-in (a < 0.6 au), intermediate-period…
Orbital misalignment of the super-Earth π Men c with the spin of its star
Planet-planet scattering events can leave an observable trace of a planet's migration history in the form of orbital misalignment with respect to the the stellar spin axis, which is measurable from…
A Gaussian Process Regression Reveals No Evidence for Planets Orbiting Kapteyn’s Star
Radial–velocity (RV) planet searches are often polluted by signals caused by gas motion at the star’s surface. Stellar activity can mimic or mask changes in the RVs caused by orbiting planets,…
The K2 Bright Star Survey. I. Methodology and Data Release
While the Kepler mission was designed to look at tens of thousands of faint stars (V ≳ 12), brighter stars that saturated the detector are important because they can be and have been observed very…
Gaussian process modelling of granulation and oscillations in red giant stars
The analysis of photometric time series in the context of transiting planet surveys suffers from the presence of stellar signals, often dubbed ‘stellar noise’. These signals, caused by stellar…
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