SIMBAD references

2018AJ....156..195R - Astron. J., 156, 195-195 (2018/November-0)

Zodiacal Exoplanets In Time (ZEIT). VIII. A two-planet system in Praesepe from K2 campaign 16.

RIZZUTO A.C., VANDERBURG A., MANN A.W., KRAUS A.L., DRESSING C.D., AGUEROS M.A., DOUGLAS S.T. and KROLIKOWSKI D.M.

Abstract (from CDS):

Young planets offer a direct view of the formation and evolution processes that produced the diverse population of mature exoplanet systems known today. The repurposed Kepler mission K2 is providing the first sample of young transiting planets by observing populations of stars in nearby, young clusters and stellar associations. We report the detection and confirmation of two planets transiting K2-264, an M2.5 dwarf in the 650 Myr old Praesepe open cluster. Using our notch-filter search method on the K2 light curve, we identify planets with periods of 5.84 and 19.66 days. This is currently the second known multi-transit system in open clusters younger than 1 Gyr. The inner planet has a radius of 2.27–0.16+0.20R and the outer planet has a radius of 2.77–0.18+0.20R. Both planets are likely mini-Neptunes. These planets are expected to produce radial velocity signals of 3.4 and 2.7 m s–1, respectively, which is smaller than the expected stellar variability in the optical (≃30 m s–1), making mass measurements unlikely in the optical but possible with future near-infrared spectrographs. We use an injection-recovery test to place robust limits on additional planets in the system and find that planets larger than 2 R with periods of 1-20 days are unlikely.

Abstract Copyright: © 2018. The American Astronomical Society.

Journal keyword(s): open clusters and associations: general - planetary systems - planets and satellites: formation - stars: low-mass

Status in Simbad:  being processed

Simbad objects: 12

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2018AJ....156..195R and select 'bookmark this link' or equivalent in the popup menu


2019.12.13-03:48:45

© Université de Strasbourg/CNRS

    • Contact