192 citations · 1.2k across the 29 of their papers we have counts for
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BEBOP VIII. SOPHIE radial velocities reveal an eccentric, circumbinary brown dwarf
Amaury H. M. J. Triaud, Thomas A. Baycroft, Neda Heidari +18
Circumbinary configurations offer a test of planet formation in an altered environment, where the inner binary has perturbed a protoplanetary disc. Comparisons of the physical and…
BEBOP VII. SOPHIE discovery of BEBOP-3b, a circumbinary giant planet on an eccentric orbit
Thomas A. Baycroft, Alexandre Santerne, Amaury H. M. J. Triaud +21
Planetary systems orbiting close binaries are valuable testing grounds for planet formation and migration models. More detections with good mass measurements are needed. We present…
BEBOP VI. Enabling the detection of circumbinary planets orbiting double-lined binaries with the DOLBY method of radial-velocity extraction
Lalitha Sairam, Thomas A. Baycroft, Isabelle Boisse +13
Circumbinary planets - planets that orbit both stars in a binary system - offer the opportunity to study planet formation and orbital migration in a different environment compare t…
Predicting the Galactic population of free-floating planets from realistic initial conditions
Gavin A. L. Coleman, William DeRocco
We present the first prediction for the mass distribution function of Galactic free-floating planets (FFPs) that aims to accurately include the relative contributions of multiple f…
On the properties of free floating planets originating in circumbinary planetary systems
Gavin A. L. Coleman
Free-floating planets are a new class of planets recently discovered. These planets don't orbit within stellar systems, instead living a nomadic life within the galaxy. How such ob…
Constraining the formation history of the TOI-1338/BEBOP-1 circumbinary planetary system
Gavin A. L. Coleman, Richard P. Nelson, Amaury H. M. J. Triaud +1
The recent discovery of multiple planets in the circumbinary system TOI-1338/BEBOP-1 raises questions about how such a system formed. The formation of the system was briefly explor…
Planet formation via pebble accretion in externally photoevaporating discs
Lin Qiao, Gavin A. L. Coleman, Thomas J. Haworth
We demonstrate that planet formation via pebble accretion is sensitive to external photoevaporation of the outer disc. In pebble accretion, planets grow by accreting from a flux of…
Global N-body simulations of circumbinary planet formation around Kepler-16 and -34 analogues I: Exploring the pebble accretion scenario
Gavin A. L. Coleman, Richard P. Nelson, Amaury H. M. J. Triaud
Numerous circumbinary planets have been discovered in surveys of transiting planets. Often, these planets are found to orbit near to the zone of dynamical instability, close to the…
Radial-velocity discovery of a second planet in the TOI-1338/BEBOP-1 circumbinary system
Matthew R. Standing, Lalitha Sairam, David V. Martin +24
We report the detection of a gas-giant planet in orbit around both stars of an eclipsing binary star system that also contains the smaller, inner transiting planet TOI-1338b. The n…
The growth and migration of massive planets under the influence of external photoevaporation
Andrew J. Winter, Thomas J. Haworth, Gavin A. L. Coleman +1
The formation of gas giant planets must occur during the first few Myr of a star's lifetime, when the protoplanetary disc still contains sufficient gas to be accreted onto the plan…
Dispersal of protoplanetary discs: How stellar properties and the local environment determine the pathway of evolution
Gavin A. L. Coleman, Thomas J. Haworth
We study the evolution and final dispersal of protoplanetary discs that evolve under the action of internal and external photoevaporation, and different degrees of viscous transpor…
Dusty circumbinary discs: inner cavity structures and stopping locations of migrating planets
Gavin A. L. Coleman, Richard P. Nelson, Amaury H. M. J. Triaud
We present the results of two-fluid hydrodynamical simulations of circumbinary discs consisting of gas and dust, with and without embedded planets, to examine the influence of the…
From Dust to Planets I: Planetesimal and Embryo Formation
Gavin A. L. Coleman
Planet formation models begin with proto-embryos and planetesimals already fully formed, missing out a crucial step, the formation of planetesimals/proto-embryos. In this work, we…
In situ formation of hot Jupiters with companion super-Earths
Sanson T. S. Poon, Richard P. Nelson, Gavin A. L. Coleman
Observations have confirmed the existence of multiple-planet systems containing a hot Jupiter and smaller planetary companions. Examples include WASP-47, Kepler-730, and TOI-1130.…
Pebbles versus planetesimals: the outcomes of population synthesis models
Natacha Brügger, Remo Burn, Gavin Coleman +2
In the core accretion scenario, a massive core forms first and then accretes an envelope. When discussing how this core forms some divergences appear. First scenarios of planet for…
The CARMENES search for exoplanets around M dwarfs. Characterization of the nearby ultra-compact multiplanetary system YZ Ceti
S. Stock, J. Kemmer, S. Reffert +38
The nearby ultra-compact multiplanetary system YZ Ceti consists of at least three planets. The orbital period of each planet is the subject of discussion in the literature due to s…
Red Dots: A temperate 1.5 Earth-mass planet in a compact multi-terrestrial planet system around GJ1061
S. Dreizler, S. V., Jeffers +17
Small low-mass stars are favourable targets for the detection of rocky habitable planets. In particular, planetary systems in the solar neighbourhood are interesting and suitable f…
Pebbles versus Planetesimals: The case of Trappist-1
Gavin A. L. Coleman, Adrien Leleu, Yann Alibert +1
We present a study on the formation of planetary systems around low mass stars similar to Trappist-1, through the accretion of either planetesimals or pebbles. The aim is to determ…
Exploring the formation by core accretion and the luminosity evolution of directly imaged planets: The case of HIP 65426 b
Gabriel-Dominique Marleau, Gavin A. L. Coleman, Adrien Leleu +1
A low-mass companion to the two-solar mass star HIP65426 has recently been detected by SPHERE at around 100 au from its host. Explaining the presence of super-Jovian planets at lar…
Stability of the co-orbital resonance under dissipation: Application to its evolution in protoplanetary discs
Adrien Leleu, Gavin Coleman, Sareh Ataiee
Despite the existence of co-orbital bodies in the solar system, and the prediction of the formation of co-orbital planets by planetary system formation models, no co-orbital exopla…
A candidate super-Earth planet orbiting near the snow line of Barnard's star
I. Ribas, M. Tuomi, A. Reiners +60
At a distance of 1.8 parsecs, Barnard's star (Gl 699) is a red dwarf with the largest apparent motion of any known stellar object. It is the closest single star to the Sun, second…
In situ accretion of gaseous envelopes on to planetary cores embedded in evolving protoplanetary discs
Gavin A. L. Coleman, John C. B. Papaloizou, Richard P. Nelson
The core accretion hypothesis posits that planets with significant gaseous envelopes accreted them from their protoplanetary discs after the formation of rocky/icy cores. Observati…
Exploring plausible formation scenarios for the planet candidate orbiting Proxima Centauri
Gavin A. L. Coleman, Richard P. Nelson, Sijme-Jan Paardekooper +3
We present a study of four different formation scenarios that may be able to explain the origin of the recently announced planet (`Proxima b') orbiting Proxima Centauri. The aim is…
Giant planet formation in radially structured protoplanetary discs
Gavin A. L. Coleman, Richard P. Nelson
Our recent N-body simulations of planetary system formation, incorporating models for the main physical processes thought to be important during the building of planets (i.e. gas d…