4 papers
White dwarf planets in star clusters: gravitational scattering versus mass-loss effects
Richard J. Parker, Dimitri Veras
White dwarfs are unique laboratories for understanding the formation, evolution and survivability of planetary systems. Post-main sequence mass-loss will change planetary orbital p…
Planet or brown dwarf? Constraints on the formation of H-type objects in IC348
Richard J. Parker, Catarina Alves de Oliveira
The formation mechanism(s) of substellar objects, such as brown dwarfs and free-floating planets, remains an ongoing puzzle in stellar and planetary physics. Recent observational a…
Hidden binaries in star-forming regions
Mary H. Rawcliffe, Nathan Griffiths-Janvier, Richard J. Parker
A significant fraction of, and possibly all, stars form in binary or multiple systems. For Solar-mass stars in the Galactic field, the distribution of orbital separations is log-no…
Can planet-planet binaries survive in star-forming regions?
Richard J. Parker, Simon P. Goodwin, Jessica L. Diamond
Significant numbers of free-floating planetary-mass objects have been discovered in nearby star-forming regions by the James Webb Space Telescope, including a substantial number (4…