English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We report the discovery of one newly confirmed planet ($P=66.06$ days,$R_{\rm{P}}=2.68\pm0.17R_\oplus$) and mass determinations of two previouslyvalidated Kepler planets, Kepler-289 b ($P=34.55$ days,$R_{\rm{P}}=2.15\pm0.10R_\oplus$) and Kepler-289-c ($P=125.85$ days,$R_{\rm{P}}=11.59\pm0.10R_\oplus$), through their transit timing variations(TTVs). We also exclude the possibility that these three planets reside in a$1:2:4$ Laplace resonance. The outer planet has very deep ($\sim1.3%$), highsignal-to-noise transits, which puts extremely tight constraints on its hoststar's stellar properties via Kepler's Third Law. The star PH3 is a young($\sim1$ Gyr as determined by isochrones and gyrochronology), Sun-like starwith $M_*=1.08\pm0.02M_\odot$, $R_*=1.00\pm0.02R_\odot$, and$T_{\rm{eff}}=5990\pm38$ K. The middle planet's large TTV amplitude ($\sim5$hours) resulted either in non-detections or inaccurate detections in previoussearches. A strong chopping signal, a shorter period sinusoid in the TTVs,allows us to break the mass-eccentricity degeneracy and uniquely determine themasses of the inner, middle, and outer planets to be $M=7.3\pm6.8M_\oplus$,$4.0\pm0.9M_\oplus$, and $M=132\pm17M_\oplus$, which we designate PH3 b, c, andd, respectively. Furthermore, the middle planet, PH3 c, has a relatively lowdensity, $\rho=1.2\pm0.3$ g/cm$^3$ for a planet of its mass, requiring asubstantial H/He atmosphere of $2.1^{+0.8}_{-0.3}%$ by mass, and joins agrowing population of low-mass, low-density planets.

astrophysical journal/the astrophysical journal

Planet Hunters VII. Discovery of a New Low-Mass, Low-Density Planet (PH3  c) Orbiting Kepler-289 with Mass Measurements of Two Additional Planets (PH3  b and d)