Radial-velocity search and statistical studies for short-period planets in the Pleiades open cluster

Abstract

We report radial-velocity search for short-period planets in the Pleiades open cluster. We observed 30 Pleiades member stars at the Okayama Astrophysical Observatory (OAO) with High Dispersion Echelle Spectrograph (HIDES). To evaluate and mitigate the effects of stellar activity on radial-velocity measurements, we computed four activity indicators (FWHM, $V_{\mathrm{span}}$, $W_{\mathrm{span}}$ and $S_{\mathrm{H}\alpha }$). Among our sample, no short-period planet candidates were detected. Stellar intrinsic RV jitter was estimated to be $52\mathrm{m}{\mathrm{s}}^{-1}$, $128\mathrm{m}{\mathrm{s}}^{-1}$ and $173\mathrm{m}{\mathrm{s}}^{-1}$ for stars with $v\sin i$ of $10\mathrm{km}{\mathrm{s}}^{-1}$, $15\mathrm{km}{\mathrm{s}}^{-1}$ and $20\mathrm{km}{\mathrm{s}}^{-1}$, respectively. We determined the planet occurrence rate from our survey and set the upper limit to 11.4\% for the planets with masses 1--13 $M_{\mathrm{JUP}}$ and period 1--10 days. To set a more stringent constraint on the planet occurrence rate, we combined the result of our survey with those of other surveys targeting open clusters with ages between 30--300 Myr. As a result, the planet occurrence rate in young open clusters was found to be less than 7.4\%, 2.9\% and 1.9\% for the planets with an orbital period of three days and masses between 1--5, 5--13, and 13--80 $M_{\mathrm{JUP}}$, respectively.

arXiv comment54 pages, 39 figures, accepted for publication in PASJ

References in corpus (36)

• Disk Frequencies and Lifetimes in Young Clusters
• The Occurrence and Mass Distribution of Close-in Super-Earths, Neptunes, and Jupiters
• Parallaxes and proper motions for 20 open clusters as based on the new Hipparcos catalogue
• Keck Spectra of Pleiades Brown Dwarf Candidates and a Precise Determination of the Lithium Depletion Edge in the Pleiades
• Least squares deconvolution of the stellar intensity and polarization spectra
• The Frequency of Hot Jupiters Orbiting Nearby Solar-Type Stars
• Transiting exoplanets from the CoRoT space mission VI. CoRoT-Exo-3b: The first secure inhabitant of the brown-dwarf desert
• Long-term magnetic activity of a sample of M-dwarf stars from the HARPS program I. Comparison of activity indices
• Zodiacal Exoplanets In Time (ZEIT) I: A Neptune-sized planet orbiting an M4.5 dwarf in the Hyades Star Cluster
• Zodiacal Exoplanets in Time (ZEIT) IV: seven transiting planets in the Praesepe cluster
• Two 'b's in the Beehive: The Discovery of the First Hot Jupiters in an Open Cluster
• Confirmation of Errors in Hipparcos Parallaxes from HST/FGS Astrometry of the Pleiades
• The GAPS programme with HARPS-N at TNG XI. Pr~0211 in M~44: the first multi-planet system in an open cluster
• Searching for Planets in the Hyades V: Limits on Planet Detection in the Presence of Stellar Activity
• The same frequency of planets inside and outside open clusters of stars
• HD 285507b: An Eccentric Hot Jupiter in the Hyades Open Cluster
• Transiting exoplanets from the CoRoT space mission. XV. CoRoT-15b: a brown dwarf transiting companion
• Three planetary companions around M67 stars
• Color difference makes a difference: four planet candidates around tau Ceti
• Differential Radial Velocities and Stellar Parameters of Nearby Young Stars
• The Seven Sisters DANCe. I. Empirical isochrones, Luminosity and Mass Functions of the Pleiades cluster
• Dynamical Interactions Make Hot Jupiters in Open Star Clusters
• Chemical composition of A and F dwarfs members of the Pleiades open cluster
• Astrometric and photometric initial mass functions from the UKIDSS Galactic Clusters Survey: I The Pleiades
• Search for giant planets in M67 III: excess of hot Jupiters in dense open clusters
• Comparison of different exoplanet mass detection limit methods using a sample of main-sequence intermediate-type stars
• Search for giant planets in M67 IV: survey results
• Zodiacal Exoplanets in Time (ZEIT) II. A "Super-Earth" Orbiting a Young K Dwarf in the Pleiades Neighborhood
• Extrasolar planets and brown dwarfs around AF-type stars. IX. The HARPS southern sample
• Survival Rates of Planets in Open Clusters: the Pleiades, Hyades, and Praesepe clusters
• K2-231 b: A sub-Neptune exoplanet transiting a solar twin in Ruprecht 147
• A Substellar Companion to the Dusty Pleiades Star HD 23514
• Formation of hot Jupiters through disk migration and evolving stellar tides
• A Substellar Common Proper Motion Companion to the Pleiad HII 1348
• Can brown dwarfs survive on close orbits around convective stars?
• A Substellar Companion to Pleiades HII 3441

Cited by in corpus (6)

• The influence of the environment on the spin evolution of low-mass stars. I. External photoevaporation of circumstellar disks
• Making hot Jupiters in stellar clusters: the importance of binary exchange
• Forming short period sub-stellar companions in 47 Tucanae -- II. Analytic expressions for the orbital evolution of planets in dense environments
• An upper limit for the growth of inner planets?
• Discovery of Volatile Gas in the Giant Impact Disk around the 150-Myr old HD 23514
• Search for giant planets in M67 V: a warm Jupiter orbiting the turn-off star S1429