• Publications
  • Influence
G11.92-0.61 MM 1: A fragmented Keplerian disk surrounding a proto-O star
We present high resolution ($\sim$300 au) Atacama Large Millimeter/submillimeter Array (ALMA) observations of the massive young stellar object G11.92-0.61 MM 1. We resolve the immediate circumstellarExpand
Towards a population synthesis model of objects formed by self-gravitating disc fragmentation and tidal downsizing
Recently, the gravitational instability (GI) model of gian t planet and brown dwarf formation has been revisited and recast into what is often referred to a s the “tidal downsizing” hypothesis. TheExpand
G11.92-0.61 MM1 : a Keplerian disc around a massive young proto-O star
European Research Council (ERC-2013-ADG DISCSIM project (Grant ID: 341137), ERC-2011-ADG ECOGAL project (Grant ID: 291227)), Science and Technology Facilities Council (Grant ID: ST/M001296/1), RoyalExpand
Phantom: A Smoothed Particle Hydrodynamics and Magnetohydrodynamics Code for Astrophysics
Abstract We present Phantom, a fast, parallel, modular, and low-memory smoothed particle hydrodynamics and magnetohydrodynamics code developed over the last decade for astrophysical applications inExpand
The VLT/NaCo large program to probe the occurrence of exoplanets and brown dwarfs at wide orbits. IV. Gravitational instability rarely forms wide, giant planets
Understanding the formation and evolution of giant planets (≥1 M_(Jup)) at wide orbital separation (≥5 AU) is one of the goals of direct imaging. Over the past 15 yr, many surveys have placed strongExpand
The nature of angular momentum transport in radiative self-gravitating protostellar discs
Semi-analytic models of self-gravitating discs often approximate the angular momentum transport generated by the gravitational instability using the phenomenology of viscosity. This allows theExpand
A numerical testbed for hypotheses of extraterrestrial life and intelligence
  • D. Forgan
  • Physics
  • International Journal of Astrobiology
  • 13 October 2008
Abstract The search for extraterrestrial intelligence (SETI) has been heavily influenced by solutions to the Drake Equation, which returns an integer value for the number of communicatingExpand
THE HUNT FOR EXOMOONS WITH KEPLER (HEK). III. THE FIRST SEARCH FOR AN EXOMOON AROUND A HABITABLE-ZONE PLANET
Kepler-22b is the first transiting planet to have been detected in the habitable zone of its host star. At 2.4 R ⊕, Kepler-22b is too large to be considered an Earth analog, but should the planetExpand
The Effect of Irradiation on the Jeans Mass in Fragmenting Self-Gravitating Protostellar Discs
When a self-gravitating disc is subject to irradiation, its propensity to fragmentation will be affected. The strength of self-gravitating disc stresses i s expected to dictate disc fragmentation: asExpand
Observational signatures of self-destructive civilizations
Abstract We address the possibility that intelligent civilizations that destroy themselves could present signatures observable by humanity. Placing limits on the number of self-destroyedExpand
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