583 citations · 5.3k across the 84 of their papers we have counts for
28 papers · 1 filter
Simulating star formation in molecular cloud cores IV. The role of turbulence and thermodynamics
R. E. Attwood, S. P. Goodwin, D. Stamatellos +1
We perform SPH simulations of the collapse and fragmentation of low-mass cores having different initial levels of turbulence (alpha_turb=0.05,0.10,0.25). We use a new treatment of…
Pairing mechanisms for binary stars
M. B. N. Kouwenhoven, A. G. A. Brown, S. P. Goodwin +2
Knowledge of the binary population in stellar groupings provides important information about the outcome of the star forming process in different environments. Binarity is also a k…
Exploring the consequences of pairing algorithms for binary stars
M. B. N. Kouwenhoven, A. G. A. Brown, S. P. Goodwin +2
Knowledge of the binary population in stellar groupings provides important information about the outcome of the star forming process in different environments (see, e.g., Blaauw 19…
The Early Expansion of Cluster Cores
N. Bastian, M. Gieles, S. P. Goodwin +4
The observed properties of young star clusters, such as the core radius and luminosity profile, change rapidly during the early evolution of the clusters. Here we present observati…
The effect of the dynamical state of clusters on gas expulsion and infant mortality
Simon P Goodwin
The star formation efficiency (SFE) of a star cluster is thought to be the critical factor in determining if the cluster can survive for a significant (>50 Myr) time. There is an o…
Open cluster stability and the effects of binary stars
R. de Grijs, S. P. Goodwin, M. B. N. Kouwenhoven +1
The diagnostic age versus mass-to-light ratio diagram is often used in attempts to constrain the shape of the stellar initial mass function (IMF), and the potential longevity of ex…
The binary fraction of the young cluster NGC 1818 in the Large Magellanic Cloud
Yi Hu, Licai Deng, Richard deGrijs +2
We use high-resolution {\sl Hubble Space Telescope} imaging observations of the young ( Myr-old) star cluster NGC 1818 in the Large Magellanic Cloud to derive an estima…
The relationship between the prestellar core mass function and the stellar initial mass function
Simon P Goodwin, Dave Nutter, Pavel Kroupa +2
Stars form from dense molecular cores, and the mass function of these cores (the CMF) is often found to be similar to the form of the stellar initial mass function (IMF). This sugg…
Intermediate to low-mass stellar content of Westerlund 1
Wolfgang Brandner, J. Simon Clark, Andrea Stolte +3
We have analysed near-infrared NTT/SofI observations of the starburst cluster Westerlund 1, which is among the most massive young clusters in the Milky Way. A comparison of colour-…
Do O-stars form in isolation?
Richard J. Parker, Simon P. Goodwin
Around 4% of O-stars are observed in apparent isolation, with no associated cluster, and no indication of having been ejected from a nearby cluster. We define an isolated O-star as…
Brown dwarf formation by binary disruption
Simon P. Goodwin, Ant Whitworth
Context: The principal mechanism by which brown dwarfs form, and its relation to the formation of higher-mass (i.e. hydrogen-burning) stars, is poorly understood. Aims: We advocate…
Adaptive smoothing lengths in SPH
R. E. Attwood, S. P. Goodwin, A. P. Whitworth
Context: There is a need to improve the fidelity of SPH simulations of self-gravitating gas dynamics. Aims: We remind users of SPH that, if smoothing lengths are adjusted so as to…
On mini-halo encounters with stars
Anne M. Green, Simon P. Goodwin
We study, analytically and numerically, the energy input into dark matter mini-haloes by interactions with stars. We find that the fractional energy input in simulations of Plummer…
Evidence for the Strong Effect of Gas Removal on the Internal Dynamics of Young Stellar Clusters
N. Bastian, S. P. Goodwin
We present detailed luminosity profiles of the young massive clusters M82-F, NGC 1569-A, and NGC 1705-1 which show significant departures from equilibrium (King and EFF) profiles.…
Star formation in molecular cores III. The effect of the turbulent power spectrum
S. P. Goodwin, A. P. Whitworth, D. Ward-Thompson
We investigate the effect of the turbulent power spectrum (P(k) \propto k^{-n}, with n=3, 4 or 5) on the fragmentation of low-mass cores, by means of SPH simulations. We adopt init…
A dynamical model for the dusty ring in the Coalsack
P. Hennebelle, A. P. Whitworth, S. P. Goodwin
Lada et al. recently presented a detailed near-infrared extinction map of Globule G2 in the Coalsack molecular cloud complex, showing that this starless core has a well-defined cen…
The distribution of ejected brown dwarfs in clusters
Simon Goodwin, David Hubber, Estelle Moraux +1
We examine the spatial distribution of brown dwarfs produced by the decay of small-N stellar systems as expected from the embryo ejection scenario. We model a cluster of several hu…
How to identify the youngest protostars
D. Stamatellos, A. P. Whitworth, D. F. A. Boyd +1
We study the transition from a prestellar core to a Class 0 protostar, using SPH to simulate the dynamical evolution, and a Monte Carlo radiative transfer code to generate the SED…
The Origin of the IMF from Core Mass Functions
Simon P. Goodwin, A. P. Whitworth, D. Ward-Thompson
We examine the initial mass functions (IMFs) of stars produced by different molecular core mass functions. Simulations suggest that more massive cores produce more stars, so we pro…
Simulating star formation in molecular cores II. The effects of different levels of turbulence
Simon P. Goodwin, Anthony P Whitworth, Derek Ward-Thompson
(Abridged) We explore, by means of a large ensemble of SPH simulations, how the level of turbulence affects the collapse and fragmentation of a star-forming core. All our simulated…
An explanation for the unusual IMF in Taurus
Simon P. Goodwin, A. P. Whitworth, Derek Ward-Thompson
In comparison with other well studied star formation regions, Taurus is unusual in several respects. (i) Its stellar initial mass function (IMF) peaks at relatively high mass ($\si…
Protostellar collapse induced by compression. II: rotation and fragmentation
P. Hennebelle, A. Whitworth, S. Cha +1
We investigate numerically and semi-analytically the collapse of low-mass, rotating prestellar cores. Initially, the cores are in approximate equilibrium with low rotation (the ini…
Simulating Supernovae Remnants in Gas Clouds
Simon Goodwin, Frazer Pearce, Peter Thomas
The Hydra -body hydrodynamics code has been modified to model, from the end of the Sedov phase, the effects of supernovae on the surrounding medium. The motivation is to investi…
The local to global ratio and the SNe Ia results
Simon P. Goodwin, Peter A. Thomas, Andrew J. Barber +2
The effects of differences between the local and global values of the Hubble parameter on the cosmologies consistent with studies of high-redshift Type Ia supernovæare discussed. I…