asynchronously rotating planet Archives

Beating planets mimic synchronous circulation patterns despite being asynchronous and show long-term variability. a. Height map of an Earth-like asynchronous planet when subjected to time-varying instellation of period same as that of rotation (= 1 day). Note that the fixing of the hotspot to the planet-frame-of-reference makes it similar to the tidally synchronous case in Fig. 2 (top). The colorbar used is the same as above. b1-b3. Motion of substellar point (green) and the corresponding hotspot (black) for ω = 2π/(1, 1.01, and 0.99) days−1 , respectively. When instellation is constant the hotspot simply lags the substellar point as in Fig. 2 (bottom). However, due to varying instellation, here we observe a fixed, an eastward, and a westward creeping hotspot, respectively, for the same remaining parameters. Note that the large oscillations between 0◦ and 360◦ in b2-b3 occur because 0◦ and 360◦ are effectively the same longitudes on a spherical planet. -- astro-ph.EP

Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Status Report, Stellar Cartography

Planetary Rhythms: Synchronous Circulation On Variably Irradiated Asynchronous Planets

by Keith CowingJanuary 18, 2025January 18, 2025

Tidal locking of planets to their host stars results in an atmospheric circulation with a hotspot fixed to the frame of reference of the planet. On the other hand, asynchronously […]

asynchronously rotating planet

Planetary Rhythms: Synchronous Circulation On Variably Irradiated Asynchronous Planets

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