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arXiv 1903.04501astro-ph.EP
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TRAPPIST-1行星之间的潮汐

Tides between the TRAPPIST-1 planets

Hamish Hay, Isamu Matsuyama

摘要:

TRAPPIST-1系统非常紧密,一颗行星在另一颗行星上引起的潮汐非常显著。我们调查是否这个来源的潮汐加热是可比的偏心潮汐提出的明星。假设一个均匀的身体与麦克斯韦流变学,我们发现,能量耗散从恒星潮汐总是占主导地位,从行星-行星潮汐在一个范围内的粘度。TRAPPIST-1 g可能经历最大比例的行星-行星潮汐加热,其中它可以占潮汐加热总量的2%和20%之间,分别为高粘度($10^{21}$ Pa·s)和低粘度($10^{14}$ Pa·s)制度。如果行星间的潮汐加热要超过恒星偏心率潮汐的加热,那么大多数TRAPPIST-1行星的轨道偏心率必须不超过e= $10^{-3}$到$10^{-4}$。

英文摘要:

The TRAPPIST-1 system is sufficiently closely packed that tides raised by one planet on another are significant. We investigate whether this source of tidal heating is comparable to eccentricity tides raised by the star. Assuming a homogeneous body with a Maxwell rheology, we find that energy dissipation from stellar tides always dominates over that from planet-planet tides across a range of viscosities. TRAPPIST-1 g may experience the greatest proportion of planet-planet tidal heating, where it can account for between 2% and 20% of the total amount of tidal heating, for high ($10^{21}$ Pa s) and low viscosity ($10^{14}$ Pa s) regimes, respectively. If planet-planet tidal heating is to exceed that from stellar eccentricity tides, orbital eccentricities must be no more than e=$10^{-3}$ to $10^{-4}$ for most of the TRAPPIST-1 planets.

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