The Impact of Stellar Oscillations on Doppler Velocity Planet Searches

Abstract

We present a quantitative investigation of the effect of stellar oscillations on Doppler velocity planet searches. Using data from four asteroseismological observation campaigns, we find a power law relationship between the noise impact of these oscillations on Doppler velocities and both the luminosity-to-mass of the target stars, and observed integration times. Including the impact of oscillation jitter should improve the quality of Keplerian fits to Doppler velocity data. The scale of the effect these oscillations have on Doppler velocity measurements is smaller than that produced by stellar activity, but is most significant for giant and subgiant stars, and at short integration times (i.e. less than a few minutes). Such short observation times tend to be used only for very bright stars. However, since it is these very same stars that tend to be targeted for the highest precision observations, as planet searches probe to lower and lower planet masses, oscillation noise for these stars can be significant and needs to be accounted for in observing strategies.

arXiv comment5 pages, to appear in MNRAS

References in corpus (11)

• Catalog of Nearby Exoplanets
• Radial Velocity Jitter in Stars from the California and Carnegie Planet Search at Keck Observatory
• Solar-like oscillations in alpha Centauri B
• The HARPS search for southern extra-solar planets. IX. mu Ara, a system with four planets
• Evidence for solar-like oscillations in beta Hydri
• Ultra-high-precision velocity measurements of oscillations in alpha Cen A
• Asteroseismology of the planet-hosting star $\mu$ Arae. I. The acoustic spectrum
• Precise radial velocities of giant stars: I. Stable stars
• Solar-like oscillations in the metal-poor subgiant nu Indi: constraining the mass and age using asteroseismology
• Asteroseismic Signatures of Stellar Magnetic Activity Cycles
• New Planets around Three G Dwarfs

Cited by in corpus (32)

• A Gaussian process framework for modelling stellar activity signals in radial velocity data
• State of the Field: Extreme Precision Radial Velocities
• Planetary detection limits taking into account stellar noise. I. Observational strategies to reduce stellar oscillation and granulation effects
• Retired A Stars and Their Companions. III. Comparing the Mass-Period Distributions of Planets Around A-Type Stars and Sun-Like Stars
• Amplitudes of solar-like oscillations: a new scaling relation
• Accounting for velocity jitter in planet search surveys
• The impact of red noise in radial velocity planet searches: Only three planets orbiting GJ581?
• Planetary detection limits taking into account stellar noise. II. Effect of stellar spot groups on radial-velocities
• A Super-Earth and two Neptunes Orbiting the Nearby Sun-like star 61 Virginis
• Radial-Velocity Fitting Challenge. II. First results of the analysis of the data set
• Color difference makes a difference: four planet candidates around tau Ceti
• Bayesian analysis of radial velocity data of GJ667C with correlated noise: evidence for only 2 planets
• Selection Functions in Doppler Planet Searches
• The Frequency of Low-Mass Exoplanets. III. Toward eta-Earth at Short Periods
• First Results from the CHEPS: Exoplanets and the Discovery of an Eccentric Brown Dwarf in the Desert
• Methods for exomoon characterisation: combining transit photometry and the Rossiter-McLaughlin effect
• The Frequency of Low-mass Exoplanets
• A long-period planet orbiting a nearby Sun-like star
• A Neptune-mass Planet Orbiting the Nearby G Dwarf HD16417
• Enhanced models for stellar Doppler noise reveal hints of a 13-year activity cycle of 55 Cancri
• A Hot Uranus Orbiting the Super Metal-rich Star HD77338 and the Metallicity - Mass Connection
• The Pan-Pacific Planet Search. IV. Two super-Jupiters in a 3:5 resonance orbiting the giant star HD33844
• The Frequency of Low-Mass Exoplanets. II. The `Period Valley'
• Evidence for at least three planet candidates orbiting HD20794
• Study of the impact of the post-MS evolution of the host star on the orbits of close-in planets. II. A giant planet in a close-in orbit around the RGB star HIP63242
• Exomoon simulations
• Activity and telluric contamination in HARPS observations of Alpha Centauri B
• $\text{GRASS}$: Distinguishing Planet-induced Doppler Signatures from Granulation with a Synthetic Spectra Generator
• Revisiting the multi-planetary system of the nearby star HD 20794: Confirmation of a low-mass planet in the habitable zone of a nearby G-dwarf
• First radial velocity results from the MINiature Exoplanet Radial Velocity Array (MINERVA)
• The RoPES project with HARPS and HARPS-N II. A third planet in the multi-planet system HD 176986
• Spectrometric method to detect exoplanets as another test to verify the invariance of the velocity of light