Transit timing variations (TTVs) can provide useful information for systems observed by transit, as they allow us to put constraints on the masses and eccentricities of planets, or even constrain existence non-transiting companions. However, TTVs also act a detection bias that prevent small planets in transit surveys would otherwise be detected standard algorithms such Boxed Least Square algori...

Abstract Kepler’s observations show most of the exoplanets are super-Earths. The formation super-Earth is generally related to atmospheric mass loss that crucial in planetary structure and evolution. shock driven by giant impact will heat planet, resulting atmosphere escape. We focus on whether self-gravity changes efficiency loss. Without self-gravity, if impactor comparable envelope mass, the...

We study stability of a circular orbit of a spinning test particle in a Kerr spacetime. We find that some of the circular orbits become unstable in the direction perpendicular to the equatorial plane, although the orbits are still stable in the radial direction. Then for the large spin case (S ∼ O(1)), the innermost stable circular orbit (ISCO) appears before the minimum of the effective potent...

We present spectroscopic measurements of the Rossiter-McLaughlin effect for WASP-148b, only known hot Jupiter with a nearby warm-Jupiter companion, from WIYN/NEID and Keck/HIRES instruments. This is one first scientific results reported newly commissioned NEID spectrograph, as well second obliquity constraint system close-in after WASP-47. WASP-148b consistent being in alignment sky-projected s...

Usually considered a morphologically conservative group, didelphid marsupials present considerable variation in ecology and body size, some of which were shown to relate to morphological structures. Thus, changes on orbit morphology are likely and could be related to that variation. We calculated orbit orientation in 873 specimens of 16 Didelphidae genera yielding estimates of orbits convergenc...