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pro vyhledávání: '"Anderson, Kassandra R."'
The eclipsing binary DI Herculis garnered interest for several decades because of an apparent disagreement between the observed and calculated values of the apsidal precession rate. The problem was resolved when both stars were found to have high obl
Externí odkaz:
http://arxiv.org/abs/2202.08275
For most hot Jupiters around main-sequence Sun-like stars, tidal torques are expected to transfer angular momentum from the planet's orbit to the star's rotation. The timescale for this process is difficult to calculate, leading to uncertainties in t
Externí odkaz:
http://arxiv.org/abs/2107.05759
Hot stars with hot Jupiters have a wide range of obliquities, while cool stars with hot Jupiters tend to have low obliquities. An enticing explanation for this pattern is tidal realignment of the cool host stars, although this explanation assumes tha
Externí odkaz:
http://arxiv.org/abs/2102.01081
Autor:
Anderson, Kassandra R., Lai, Dong
The large spin-orbit misalignments in the DI Herculis stellar binary system have resolved the decades-long puzzle of the anomalously slow apsidal precession rate, but raise new questions regarding the origin of the obliquities. This paper investigate
Externí odkaz:
http://arxiv.org/abs/2010.15122
Planetary systems with sufficiently small orbital spacings can experience planetary mergers and ejections. The branching ratio of mergers vs ejections depends sensitively on the treatment of planetary close encounters. Previous works have adopted a s
Externí odkaz:
http://arxiv.org/abs/2006.10067
Many warm Jupiters (WJs) have substantial eccentricities, which are linked to their formation and migration histories. This paper explores eccentricity excitation of WJs due to planet-planet scattering, beginning with 3-4 planets in unstable orbits,
Externí odkaz:
http://arxiv.org/abs/1908.04300
High-eccentricity migration is an important channel for the formation of hot Jupiters (HJs). In particular, Lidov-Kozai (LK) oscillations of orbital eccentricity/inclination induced by a distant planetary or stellar companion, combined with tidal fri
Externí odkaz:
http://arxiv.org/abs/1812.05618
Autor:
Anderson, Kassandra R., Lai, Dong
Stellar spin-orbit misalignments (obliquities) in hot Jupiter systems have been extensively probed. Such obliquities may reveal clues about hot Jupiter dynamical histories. Common explanations for generating obliquities include high-eccentricity migr
Externí odkaz:
http://arxiv.org/abs/1806.07892
Consider a planet with its orbital angular momentum axis aligned with the spin axis of its host star. To what extent does an inclined distant companion (giant planet or binary star) affect this alignment? We provide an analytic, quantitative answer a
Externí odkaz:
http://arxiv.org/abs/1710.11140
Autor:
Anderson, Kassandra R., Lai, Dong
Recent studies have proposed that most warm Jupiters (WJs, giant planets with semi-major axes in the range of 0.1-1 AU) probably form in-situ, or arrive in their observed orbits through disk migration. However, both in-situ formation and disk migrati
Externí odkaz:
http://arxiv.org/abs/1706.00084