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

The two most common techniques for measuring planetary masses - the radialvelocity (RV) and the transit timing variations (TTVs) techniques - have beenobserved to yield systematically different masses for planets of similar radii.Following Steffen (2016), we consider the effects of the observational biasesof the two methods as a possible cause for this difference. We find that atshort orbital periods ($P<11$ day), the two methods produce statisticallysimilar results, whereas at long periods ($P>11$ day) the RV masses aresystematically higher than the TTV ones. We suggest that this is consistentwith an RV detection-sensitivity bias for longer periods. On the other hand, wedo find an apparently significant difference between the short and thelong-period planets, obtained by both observing techniques-the mass-radiusrelationship parameterized as a power law has a steeper index at short periodsthan at long periods. We also point out another anticipated observational biasbetween the two techniques - multiple planet systems with derived RV masseshave substantially larger period ratios than the systems with TTV massderivation.

The Planetary Mass-Radius Relation and its Dependence on Orbital Period as Measured by Transit Timing Variations and Radial Velocities