| Autor: |
Mahmud, Mohammad M, Penev, Kaloyan M, Schussler, Joshua A |
| Předmět: |
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| Zdroj: |
Monthly Notices of the Royal Astronomical Society; 10/15/2023, Vol. 525 Issue 1, p876-897, 22p |
| Abstrakt: |
In this project, we determined the constraints on the modified tidal quality factor, |$Q_{\rm pl}^{\prime }$| , of gas-giant planets orbiting close to their host stars. We allowed |$Q_{\rm pl}^{\prime }$| to depend on tidal frequency, accounting for the multiple tidal waves with time-dependent frequencies simultaneously present on the planet. We performed our analysis on 78 single-star and single-planet systems, with giant planets and host stars with radiative cores and convective outer shells. We extracted constraints on the frequency-dependent |$Q_{\rm pl}^{\prime }$| for each system separately and combined them to find general constraints on |$Q_{\rm pl}^{\prime }$| required to explain the observed eccentricity envelope while simultaneously allowing the observed eccentricities of all systems to survive to the present-day. Individual systems do not place tight constraints on |$Q_{\rm pl}^{\prime }$|. However, since similar planets must have similar tidal dissipation, we require that a consistent, possibly frequency-dependent, model must apply. Under that assumption, we find that the value of |$\log _{10}Q_{\rm pl}^{\prime }$| for HJs is 5.0 ± 0.5 for the range of tidal period from 0.8 to 7 d. We did not see any clear sign of frequency dependence of |$Q_{\rm pl}^{\prime }$|. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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