A5069253056- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
University of Chicago
2019-2023
The climate of a planet can be strongly affected by its eccentricity due to variations in the stellar flux. There are two limits for dependence inner habitable zone boundary (IHZ) on eccentricity: (1) mean-stellar flux approximation ($S_{\mbox{IHZ}} \propto \sqrt{1-e^2}$), which temperature is approximately constant throughout orbit, and (2) maximum-stellar (1-e)^2$), adjusts instantaneously Which limit appropriate determined dimensionless parameter $\Pi = \frac{C}{BP}$, where $C$ heat...
Abstract Wide-orbit exoplanets are starting to be detected, and planetary formation models under development understand their properties. We propose a population of “Oort” planets around other stars, forming by means mechanism analogous how the solar system’s Oort cloud comets was populated. Gravitational scattering among is inferred from eccentricity distribution gas giant measured Doppler technique. This thought commence while protoplanetary disk dissipating, 10 6 –10 7 yr after star, or...
Planet-planet perturbations can cause planets' orbital elements to change on secular timescales. Previous work has evaluated the nodal precession rate for planets in limit of low $\alpha$ (semi-major axis ratio, 0$<$$\alpha$$\leq$1). Our simulations show that systems at high (or period ratio), similar multiplanet found Kepler survey, have a is more strongly dependent eccentricity and inclination. We present complete expansion fourth order disturbing function this analytical solution much...
Second-order mean-motion resonances lead to an interesting phenomenon in the sculpting of period ratio distribution due their shape and width period-ratio/eccentricity space. As osculating periods librate resonance, time-averaged approaches exact commensurability. The second-order increases with increasing eccentricity, thus more eccentric systems have a stronger peak at commensurability when averaged over sufficient time. libration is short enough that this time-averaging behavior expected...
The architecture of a planetary system can influence the habitability planet via orbital effects, particularly in areas stability and eccentricity. Some these effects are readily apparent, when they occur on short timescales that easily numerically calculable. However, appearance evolution life take place gigayear timescales, long enough secular become important. These difficult to investigate, as direct integration requires significant computational time. In this paper, we apply...
The climate of a planet can be strongly affected by its eccentricity due to variations in the stellar flux. There are two limits for dependence inner habitable zone boundary (IHZ) on eccentricity: (1) mean-stellar flux approximation ($S_{\mbox{IHZ}} \propto \sqrt{1-e^2}$), which temperature is approximately constant throughout orbit, and (2) maximum-stellar (1-e)^2$), adjusts instantaneously Which limit appropriate determined dimensionless parameter $Π= \frac{C}{BP}$, where $C$ heat capacity...