18 citations · 18 across the 1 of their papers we have counts for
5 papers
Searching for wide-orbit gravitational instability protoplanets with ALMA in the dust continuum
J. Humphries, C. Hall, T. J. Haworth +1
Searches for young gas giant planets at wide separations have so far focused on techniques appropriate for compact (Jupiter sized) planets. Here we point out that protoplanets born…
TW Hya: an old protoplanetary disc revived by its planet
Sergei Nayakshin, Takashi Tsukagoshi, Cassandra Hall +6
Dark rings with bright rims are the indirect signposts of planets embedded in protoplanetary discs. In a recent first, an azimuthally elongated AU-scale blob, possibly a planet, wa…
On the origin of wide-orbit ALMA planets: giant protoplanets disrupted by their cores
Jack Humphries, Sergei Nayakshin
Recent ALMA observations may indicate a surprising abundance of sub-Jovian planets on very wide orbits in protoplanetary discs that are only a few million years old. These planets…
Constraining the initial planetary population in the gravitational instability model
Jack Humphries, Allona Vazan, Mariangela Bonavita +2
Direct imaging (DI) surveys suggest that gas giants beyond 20 AU are rare around FGK stars. However, it is not clear what this means for the formation frequency of Gravitational In…
Changes in the metallicity of gas giant planets due to pebble accretion
Jack Humphries, Sergei Nayakshin
We run numerical simulations to study the accretion of gas and dust grains onto gas giant planets embedded into massive protoplanetary discs. The outcome is found to depend on the…