Signals embedded in the radial velocity noise - Periodic variations in the τ Ceti velocities

@article{Tuomi2013SignalsEI,
  title={Signals embedded in the radial velocity noise - Periodic variations in the $\tau$ Ceti velocities},
  author={Mikko Tuomi and Hugh R. A. Jones and James S Jenkins and C. G. Tinney and R. Paul Butler and Steven S. Vogt and John R. Barnes and Robert A. Wittenmyer and S. O’Toole and Jonathan Horner and Jeremy Bailey and B. D. Carter and Duncan J. Wright and Graeme S. Salter and D J Pinfield},
  journal={Astronomy and Astrophysics},
  year={2013},
  volume={551},
  pages={1-21}
}
Context. The abilities of radial velocity exoplanet surveys to detect the lowest-mass extra-solar planets are currently limited by a combination of instrument precision, lack of data, and 'jitter'. Jitter is a general term for any unknown features in the noise, and reflects a lack of detailed knowledge of stellar physics (asteroseismology, starspots, magnetic cycles, granulation, and other stellar surface phenomena), as well as the possible underestimation of instrument noise. Aims. We study… Expand
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References

SHOWING 1-10 OF 68 REFERENCES
Do stellar magnetic cycles influence the measurement of precise radial velocities
The ever increasing level of precision achieved by present and future radial-velocity instruments is opening the way to discovering very low-mass, long-period planets (e.g. solar-system analogs).… Expand
Bayesian re-analysis of the radial velocities of Gliese 581. Evidence in favour of only four planetary companions
Aims. The Gliese 581 planetary system has received attention because it has been proposed to host a low-mass planet in its habitable zone. We re-analyse the radial velocity measurements reported to… Expand
Selection functions in doppler planet searches
We present a preliminary analysis of the sensitivity of Anglo-Australian Planet Search data to the orbital parameters of extrasolar planets. To do so, we have developed new tools for the automatic… Expand
Chromospheric activities and kinematics for solar type dwarfs and subgiants : analysis of the activity distribution and the AVR
Aims. In this work we present chromospheric activity indices, kinematics, radial-velocities, and rotational velocities for more than 850 FGK-type dwarfs and subgiant stars in the southern hemisphere… Expand
Habitable planets around the star Gliese 581
Radial velocity surveys are now able to detect terrestrial planets at habitable distance from M-type stars. Recently, two planets with minimum masses below 10 Earth masses were reported in a triple… Expand
Signals embedded in the radial velocity noise
TLDR
An overview of Bayesian techniques is presented and detailed analyses of the HARPS-TERRA velocities of HD 40307, a nearby star observed to host a candidate habitable planet, are presented to demonstrate in practice the applicability of Bayes' rule to astronomical data. Expand
Detecting extrasolar planets from stellar radial velocities using Bayesian evidence
Stellar radial velocity (RV) measurements have proven to be a very successful method for detecting extrasolar planets. Analysing RV data to determine the parameters of the extrasolar planets is a… Expand
The frequency of low-mass exoplanets
We report first results from the Anglo-Australian Telescope Rocky Planet Search—an intensive, high-precision Doppler planet search targeting low-mass exoplanets in contiguous 48 night observing… Expand
A near-infrared interferometric survey of debris disk stars. I. Probing the hot dust content aroun
Context. The quest for hot dust in the central region of debris disks re quires high resolution and high dynamic range imaging. Nearinfrared interferometry is a powerful means to directly det ect… Expand
The CORALIE survey for southern extra-solar planets - IX. A 1.3-day period brown dwarf disguised as a planet
In this article we present the case of HD 41004 AB, a system composed of a K0V star and a 3.7-mag fainter M-dwarf companion. We have obtained 86 CORALIE spectra of this system with the goal of… Expand
...
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