253 citations · 608 across the 16 of their papers we have counts for
15 papers · 1 filter
Accounting for Transit Timing Detectability: Biases in Planetary Radius and Orbital Period
Skylar D'Angiolillo, Daniel Fabrycky, Mariah G. MacDonald
Transit Timing Variations (TTVs) are deviations from the time an observer would expect to see an exoplanet transit its host star. In multi-planetary systems, significant TTVs may i…
Effects of Outer Giant Planets on In Situ Formation of Inner Super-Earths
Phoebe Sandhaus, Rebekah I. Dawson, Mariah G. MacDonald +2
Recent studies have found an observational correlation between the presence of outer giant planets and inner super-Earths, which implies that outer giants do not suppress the forma…
Effects of Pebble Accretion Isolation Mass on Observable Exoplanet Properties
Lucas Brefka, Rebekah I. Dawson, Mariah G. MacDonald +2
The Kepler Mission has discovered a plethora of planetary systems with super-Earth sized planets. These systems exhibit many properties, from widely-spaced planets with non-negligi…
Beyond Point Masses. III. Detecting Haumea's Nonspherical Gravitational Field
Benjamin C. N. Proudfoot, Darin A. Ragozzine, William Giforos +3
The dwarf planet Haumea is one of the most compelling transneptunian objects (TNOs) to study, hosting two small, dynamically interacting satellites, a family of nearby spectrally u…
exoMMR: a New Python Package to Confirm and Characterize Mean Motion Resonances
Mariah G. MacDonald, Michael S. Polania Vivas, Skylar D'Angiolillo +2
The study of orbital resonances allows for the constraint of planetary properties of compact systems. We can predict a system's resonances by observing the orbital periods of the p…
Confirming Resonance in Three Transiting Systems
Tyler Quinn, Mariah MacDonald
Although resonant planets have orbital periods near commensurability, resonance is also dictated by other factors, such as the planets' eccentricities and masses, and therefore mus…
A Green Bank Telescope search for narrowband technosignatures between 1.1-1.9 GHz during 12 Kepler planetary transits
Sofia Z. Sheikh, Shubham Kanodia, Emily Lubar +12
A growing avenue for determining the prevalence of life beyond Earth is to search for "technosignatures" from extraterrestrial intelligences/agents. Technosignatures require signif…
Confirming the 3:2 Resonance Chain of K2-138
Mariah G. MacDonald, Leonard Feil, Tyler Quinn +1
The study of orbital resonances allows for the constraint of planetary properties of compact systems. K2-138 is an early K-type star with six planets, five of which have been propo…
A Five-Planet Resonant Chain: Reevaluation of the Kepler-80 System
Mariah G. MacDonald, Cody J. Shakespeare, Darin Ragozzine
Since the launch of the Kepler space telescope in 2009 and the subsequent K2 mission, hundreds of multi-planet systems have been discovered. The study of such systems, both as indi…
Chains of Planets in Mean Motion Resonances Arising from Oligarchic Growth
Sarah J. Morrison, Rebekah I. Dawson, Mariah G. MacDonald
Exoplanet systems with multiple planets in mean motion resonances have often been hailed as a signpost of disk driven migration. Resonant chains like Kepler-223 and Kepler-80 consi…
Forming Diverse Super-Earth Systems in Situ
Mariah G. MacDonald, Rebekah I. Dawson, Sarah J. Morrison +2
Super-Earths and mini-Neptunes exhibit great diversity in their compositional and orbital properties. Their bulk densities span a large range, from those dense enough to be purely…
Examining the Radius Valley: a Machine Learning Approach
Mariah G. MacDonald
The ''radius valley" is a relative dearth of planets between two potential populations of exoplanets, super-Earths and mini-Neptunes. This feature appears in examining the distribu…
Three Pathways for Observed Resonant Chains
Mariah G. MacDonald, Rebekah I. Dawson
A question driving many studies is whether the thousands of exoplanets known today typically formed where we observe them or formed further out in the disk and migrated in. Early d…
The orbital eccentricity of small planet systems
Vincent Van Eylen, Simon Albrecht, Xu Huang +8
We determine the orbital eccentricities of individual small Kepler planets, through a combination of asteroseismology and transit light-curve analysis. We are able to constrain the…
A Dynamical Analysis of the Kepler-80 System of Five Transiting Planets
Mariah G. MacDonald, Darin Ragozzine, Daniel C. Fabrycky +10
Kepler has discovered hundreds of systems with multiple transiting exoplanets which hold tremendous potential both individually and collectively for understanding the formation and…