S. P. Goodwin
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View article: Can planet-planet binaries survive in star-forming regions?
Can planet-planet binaries survive in star-forming regions? Open
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 (42) of Jupiter Mass Binary Objects ('JuMBOs') in the Orion N…
View article: Can planet–planet binaries survive in star-forming regions?
Can planet–planet binaries survive in star-forming regions? Open
Significant numbers of free-floating planetary-mass objects have been discovered in nearby star-forming regions by the JWST, including a substantial number (42) of Jupiter Mass Binary Objects (‘JuMBOs’) in the Orion Nebula Cluster (ONC). T…
View article: Dynamical Evolution of Substructured Star Clusters at 3 kpc from the Galactic Center
Dynamical Evolution of Substructured Star Clusters at 3 kpc from the Galactic Center Open
We investigate the evolution of initial fractal clusters at 3 kpc from the Galactic Center (GC) of the Milky Way and show how red supergiant clusters (RSGCs)-like objects, which are considered to be the result of active star formation in t…
View article: Deviations from the universal initial mass function in binary star clusters
Deviations from the universal initial mass function in binary star clusters Open
The stellar mass distribution in star-forming regions, stellar clusters and associations, the initial mass function (IMF), appears to be invariant across different star-forming environments, and is consistent with the IMF observed in the G…
View article: From cores to stars: searching for a universal rule for star formation
From cores to stars: searching for a universal rule for star formation Open
Star formation is generally considered to be ‘universal’, meaning that it is statistically the same everywhere (and at all times). We investigate whether it is possible to find a simple rule for the conversion of molecular cores into bound…
View article: The RMS survey: a census of massive YSO multiplicity in the $K$-band
The RMS survey: a census of massive YSO multiplicity in the $K$-band Open
Close to 100 per cent of massive stars are thought to be in binary systems. The multiplicity of massive stars seems to be intrinsically linked to their formation and evolution, and Massive Young Stellar Objects are key in observing this ea…
View article: The RMS survey: A census of massive YSO multiplicity in the <i>K</i> band
The RMS survey: A census of massive YSO multiplicity in the <i>K</i> band Open
Close to 100 per cent of massive stars are thought to be in binary systems. The multiplicity of massive stars seems to be intrinsically linked to their formation and evolution, and massive young stellar objects (MYSOs) are key in observing…
View article: Modelling uncertainties in wide binary constraints on primordial black holes
Modelling uncertainties in wide binary constraints on primordial black holes Open
Dark matter in the form of compact objects with mass Mco ≳ 10 M⊙ can be constrained by its dynamical effects on wide binary stars. Motivated by the recent interest in primordial black hole dark matter, we revisit the theoretical modelling …
View article: On Encounter Rates in Star Clusters
On Encounter Rates in Star Clusters Open
Close encounters between stars in star-forming regions are important as they can perturb or destroy protoplanetary disks, young planetary systems, and multiple-star systems. We simulate simple, virialized, equal-mass N -body star clusters …
View article: Modelling uncertainties in wide binary constraints on primordial black holes
Modelling uncertainties in wide binary constraints on primordial black holes Open
Dark matter in the form of compact objects with mass $M_{\rm co} \gtrsim 10 M_{\odot}$ can be constrained by its dynamical effects on wide binary stars. Motivated by the recent interest in Primordial Black Hole dark matter, we revisit the …
View article: Few observation binary orbit solver (<scp>fobos</scp>) from two (or more) astrometric observations
Few observation binary orbit solver (<span>fobos</span>) from two (or more) astrometric observations Open
We have developed a new, fast method of estimating the orbital properties of a binary or triple system using as few as two epochs of astrometric data. fobos (Few Observation Binary Orbit Solver) uses a flat prior brute force Monte Carlo me…
View article: Few Observation Binary Orbit Solver (FOBOS) from two (or more) astrometric observations
Few Observation Binary Orbit Solver (FOBOS) from two (or more) astrometric observations Open
We have developed a new, fast method of estimating the orbital properties of a binary or triple system using as few as two epochs of astrometric data. FOBOS (Few Observation Binary Orbit Solver) uses a flat prior brute force Monte Carlo me…
View article: OB Associations
OB Associations Open
OB associations are low-density groups of young stars that are dispersing from their birth environment into the Galactic field. They are important for understanding the star formation process, early stellar evolution, the properties and di…
View article: The first interferometric survey of massive YSOs in the <i>K</i>-band
The first interferometric survey of massive YSOs in the <i>K</i>-band Open
Context. Circumstellar discs are essential for the formation of high mass stars, while multiplicity, and in particular binarity, appears to be an inevitable outcome, as the vast majority of massive stars (>8 M ⊙ ) are found in binaries (up…
View article: The first interferometric survey in the K-band of massive YSOs. On the hot dust, ionised gas, and binarity at au scales
The first interferometric survey in the K-band of massive YSOs. On the hot dust, ionised gas, and binarity at au scales Open
Circumstellar discs are essential for high mass star formation, while multiplicity, in particular binarity, appears to be an inevitable outcome since the vast majority of massive stars (> 8 Msun) are found in binaries (up to 100%). We cons…
View article: External Photoevaporation of Protoplanetary Disks: Does Location Matter?
External Photoevaporation of Protoplanetary Disks: Does Location Matter? Open
Many theoretical studies have shown that external photoevaporation from massive stars can severely truncate, or destroy altogether, the gaseous protoplanetary disks around young stars. In tandem, several observational studies report a corr…
View article: Making top-heavy IMFs from canonical IMFs near the Galactic Centre
Making top-heavy IMFs from canonical IMFs near the Galactic Centre Open
We show that dynamical evolution in a strong (Galactic Centre-like) tidal field can create clusters that would appear to have very top-heavy initial mass functions (IMFs). The tidal disruption of single star-forming events can leave severa…
View article: The velocity structure of Cygnus OB2
The velocity structure of Cygnus OB2 Open
The kinematic structure of the Cygnus OB2 association is investigated. No evidence of expansion or contraction is found at any scale within the region. Stars that are within ∼0.5 pc of one another are found to have more similar velocities …
View article: Properties of the dense core population in Orion B as seen by the <i>Herschel</i> Gould Belt survey
Properties of the dense core population in Orion B as seen by the <i>Herschel</i> Gould Belt survey Open
We present a detailed study of the Orion B molecular cloud complex ( d ~ 400 pc), which was imaged with the PACS and SPIRE photometric cameras at wavelengths from 70 to 500 μ m as part of the Herschel Gould Belt survey (HGBS). We release n…
View article: COM volume 155 Issue 8 Cover and Back matter
COM volume 155 Issue 8 Cover and Back matter Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: A pilot survey of the binarity of Massive Young Stellar Objects with<i>K</i>-band adaptive optics
A pilot survey of the binarity of Massive Young Stellar Objects with<i>K</i>-band adaptive optics Open
We present the first search for binary companions of Massive Young Stellar Objects (MYSOs) using AO-assisted $K$ band observations, with NaCo at the VLT. We have surveyed 32 MYSOs from the RMS catalogue, probing the widest companions, with…
View article: A method to analyse velocity structure
A method to analyse velocity structure Open
We present a new method of analysing and quantifying velocity structure in\nstar forming regions suitable for the rapidly increasing quantity and quality\nof stellar position-velocity data. The method can be applied to data in any\nnumber …
View article: Is stellar multiplicity universal? Tight stellar binaries in the Orion Nebula Cluster
Is stellar multiplicity universal? Tight stellar binaries in the Orion Nebula Cluster Open
We present a survey for the tightest visual binaries among 0.3-2 Msun members\nthe Orion Nebula Cluster (ONC). Among 42 targets, we discovered 13 new\n0.025-0.15" companions. Accounting for the Branch bias, we find a companion\nstar fracti…
View article: The early dynamical evolution of star clusters near the Galactic Centre
The early dynamical evolution of star clusters near the Galactic Centre Open
We examine the dynamical evolution of both Plummer sphere and substructured (fractal) star forming regions in Galactic Centre (GC) strong tidal fields to see what initial conditions could give rise to an Arches-like massive star cluster by…
View article: The early dynamical evolution of star clusters near the Galactic Centre
The early dynamical evolution of star clusters near the Galactic Centre Open
We examine the dynamical evolution of both Plummer sphere and substructured (fractal) star forming regions in Galactic Centre (GC) strong tidal fields to see what initial conditions could give rise to an Arches-like massive star cluster by…
View article: Massive, wide binaries as tracers of massive star formation
Massive, wide binaries as tracers of massive star formation Open
Massive stars can be found in wide (hundreds to thousands AU) binaries with\nother massive stars. We use $N$-body simulations to show that any bound cluster\nshould always have approximately one massive wide binary: one will probably\nform…
View article: Hierarchical formation of Westerlund 1: a collapsing cluster with no primordial mass segregation?
Hierarchical formation of Westerlund 1: a collapsing cluster with no primordial mass segregation? Open
We examine the level of substructure and mass segregation in the massive,\nyoung cluster Westerlund 1. We find that it is relatively smooth, with little\nor no mass segregation, but with the massive stars in regions of significantly\nhighe…
View article: How do binary clusters form?
How do binary clusters form? Open
Approximately 10 per cent of star clusters are found in pairs, known as\nbinary clusters. We propose a mechanism for binary cluster formation; we use\nN-body simulations to show that velocity substructure in a single (even fairly\nsmooth) …