Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Forgan, D. H."'
Autor:
Ilee, J. D., Cyganowski, C. J., Brogan, C. L., Hunter, T. R., Forgan, D. H., Haworth, T. J., Clarke, C. J., Harries, T. J.
We present high resolution ($\sim$300 au) Atacama Large Millimeter/submillimeter Array (ALMA) observations of the massive young stellar object G11.92-0.61 MM 1. We resolve the immediate circumstellar environment of MM 1 in 1.3 mm continuum emission a
Externí odkaz:
http://arxiv.org/abs/1811.05267
We demonstrate numerical techniques for automatic identification of individual spiral arms in hydrodynamic simulations of astrophysical discs. Building on our earlier work, which used tensor classification to identify regions that were "spiral-like",
Externí odkaz:
http://arxiv.org/abs/1802.01364
It is likely that most protostellar systems undergo a brief phase where the protostellar disc is self-gravitating. If these discs are prone to fragmentation, then they are able to rapidly form objects that are initially of several Jupiter masses and
Externí odkaz:
http://arxiv.org/abs/1711.01133
Autor:
Forgan, D. H., Rowlands, K., Gomez, H. L., Gomez, E. L., Schofield, S. P., Dunne, L., Maddox, S.
The process of planet formation offers a rich source of dust production via grain growth in protostellar discs, and via grinding of larger bodies in debris disc systems. Chemical evolution models, designed to follow the build up of metals and dust in
Externí odkaz:
http://arxiv.org/abs/1708.07053
Autor:
Ilee, J. D., Forgan, D. H., Evans, M. G., Hall, C., Booth, R., Clarke, C. J., Rice, W. K. M., Boley, A. C., Caselli, P., Hartquist, T. W., Rawlings, J. M. C.
In this paper, we model the chemical evolution of a 0.25 M$_{\odot}$ protoplanetary disc surrounding a 1 M$_{\odot}$ star that undergoes fragmentation due to self-gravity. We use Smoothed Particle Hydrodynamics including a radiative transfer scheme,
Externí odkaz:
http://arxiv.org/abs/1708.01815
Autor:
Ilee, J. D., Cyganowski, C. J., Nazari, P., Hunter, T. R., Brogan, C. L., Forgan, D. H., Zhang, Q.
The formation process of massive stars is not well understood, and advancement in our understanding benefits from high resolution observations and modelling of the gas and dust surrounding individual high-mass (proto)stars. Here we report sub-arcseco
Externí odkaz:
http://arxiv.org/abs/1608.05561
There have been several recent detections of candidate Keplerian discs around massive young protostars. Given the relatively large disc-to-star mass ratios in these systems, and their young ages, it is worth investigating their propensity to becoming
Externí odkaz:
http://arxiv.org/abs/1608.05539
Photosynthetic life requires sufficient photosynthetically active radiation (PAR) to metabolise. On Earth, plant behaviour, physiology and metabolism are sculpted around the night-day cycle by an endogenous biological circadian clock. The evolution o
Externí odkaz:
http://arxiv.org/abs/1402.5044
Recently it has been suggested that the fragmentation boundary in Smoothed Particle Hydrodynamic (SPH) and FARGO simulations of self-gravitating accretion discs with beta-cooling do not converge as resolution is increased. Furthermore, this recent wo
Externí odkaz:
http://arxiv.org/abs/1311.7355
Recent simulations of self-gravitating accretion discs, carried out using a three-dimensional Smoothed Particle Hydrodynamics (SPH) code by Meru and Bate, have been interpreted as implying that three-dimensional global discs fragment much more easily
Externí odkaz:
http://arxiv.org/abs/1111.3147