133 citations · 423 across the 16 of their papers we have counts for
18 papers
No statistically significant evidence for a correlation between stellar and planetary composition
Daisy A. Turner, Annelies Mortier, James G. Rogers +4
The chemical compositions of planets and their hosts stars are intrinsically linked, having formed from the same protostellar material. Characterising this relationship provides ke…
Testing the prevalence of hydrogen-silicate miscibility in young sub-Neptunes
James G. Rogers, Hilke E. Schlichting
Hydrogen-silicate miscibility can significantly alter the interior structure and thermal evolution of sub-Neptunes. We consider the interplay between this miscibility and stellar-d…
The Barnard's Star Planetary System: Stability, Composition, and Evolution of Four Sub-Earth Exoplanets
Xander Byrne, Claire Marie Guimond, Amy Bonsor +3
Barnard's Star is the nearest single star to the Sun (1.8 pc), and hosts four recently-discovered planets. The star also has well-characterized stellar abundances of important rock…
Preparing for the Early eVolution Explorer: Detecting the Primordial, Transiting Exoplanet Population
George Zhou, James G. Rogers, Jennifer A. Burt +17
The close-in small planet population may be formed either with hydrogen/helium dominated envelopes or with water-rich interiors. Both scenarios reproduce the present day planet pop…
Using observations of escaping H/He to constrain the atmospheric composition of sub-Neptunes
James G. Rogers, James E. Owen, Ethan Schreyer +1
The internal composition of sub-Neptunes remains a prominent unresolved question in exoplanetary science. We present a technique to place constraints on envelope mean molecular wei…
Redefining interiors and envelopes: hydrogen-silicate miscibility and its consequences for the structure and evolution of sub-Neptunes
James G. Rogers, Edward D. Young, Hilke E. Schlichting
We present the first evolving interior structure model for sub-Neptunes that accounts for the miscibility between silicate magma and hydrogen. Silicate and hydrogen are miscible ab…
On the road to the radius valley: distinguishing between gas dwarfs and water worlds with young transiting exoplanets
James G. Rogers
The detection of young transiting exoplanets represents a new frontier in our understanding of planet formation and evolution. For the population of observed close-in sub-Neptunes,…
Most Super-Earths Have Less Than 3% Water
James G. Rogers, Caroline Dorn, Vivasvaan Aditya Raj +2
Super-Earths are highly irradiated, small planets with bulk densities approximately consistent with Earth. We construct combined interior-atmosphere models of super-Earths that tra…
Phase equilibria of sub-Neptunes and super-Earths
Edward D. Young, Lars Stixrude, James G. Rogers +2
We investigate the consequences of non-ideal chemical interaction between silicate and overlying hydrogen-rich envelopes for rocky planets using basic tenets of phase equilibria. B…
The occurrence of small, short-period planets younger than 200 Myr with TESS
Sydney Vach, George Zhou, Chelsea X. Huang +10
Within the first few hundreds of millions of years, many physical processes sculpt the eventual properties of young planets. NASA's TESS mission has surveyed young stellar associat…
Fleeting but not Forgotten: the Imprint of Escaping Hydrogen Atmospheres on Super-Earth Interiors
James G. Rogers, Hilke E. Schlichting, Edward D. Young
Small, close-in exoplanets are divided into two sub-populations: super-Earths and sub-Neptunes. Most super-Earths are thought to have lost their primordially accreted hydrogen-domi…
Shallower radius valley around low-mass hosts: Evidence for icy planets, collisions or high-energy radiation scatter
Cynthia S. K. Ho, James G. Rogers, Vincent Van Eylen +2
The radius valley, i.e., a dearth of planets with radii between 1.5 and 2 Earth radii, provides insights into planetary formation and evolution. Using homogenously revised planetar…
Under the light of a new star: evolution of planetary atmospheres through protoplanetary disc dispersal and boil-off
James G. Rogers, James E. Owen, Hilke E. Schlichting
The atmospheres of small, close-in exoplanets are vulnerable to rapid mass-loss during protoplanetary disc dispersal via a process referred to as `boil-off', in which confining pre…
Conclusive evidence for a population of water-worlds around M-dwarfs remains elusive
James G. Rogers, Hilke E. Schlichting, James E. Owen
The population of small, close-in exoplanets is bifurcated into super-Earths and sub-Neptunes. We calculate physically motivated mass-radius relations for sub-Neptunes, with rocky…
The California-Kepler Survey. X. The Radius Gap as a Function of Stellar Mass, Metallicity, and Age
Erik A. Petigura, James G. Rogers, Howard Isaacson +10
In 2017, the California-Kepler Survey (CKS) published its first data release (DR1) of high-resolution optical spectra of 1305 planet hosts. Refined CKS planet radii revealed that s…
Exoplanet atmosphere evolution: emulation with neural networks
James G. Rogers, Clàudia Janó Muñoz, James E. Owen +1
Atmospheric mass-loss is known to play a leading role in sculpting the demographics of small, close-in exoplanets. Knowledge of how such planets evolve allows one to ``rewind the c…
Photoevaporation vs. core-powered mass-loss: model comparison with the 3D radius gap
James G. Rogers, Akash Gupta, James E. Owen +1
The EUV/X-ray photoevaporation and core-powered mass-loss models are both capable of reproducing the bimodality in the sizes of small, close-in exoplanets observed by the \textit{K…
Unveiling the Planet Population at Birth
James G. Rogers, James E. Owen
The radius distribution of small, close-in exoplanets has recently been shown to be bimodal. The photoevaporation model predicted this bimodality. In the photoevaporation scenario,…