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Robin Jeffries' Outputs (4)

The Age of Taurus: Environmental Effects on Disc Lifetimes (2015)
Presentation / Conference Contribution
Rees, J. M., Wilson, T., Bell, C. P. M., Jeffries, R. D., & Naylor, T. The Age of Taurus: Environmental Effects on Disc Lifetimes

Using semi-empirical isochrones, we find the age of the Taurus star-forming region to be 3-4 Myr. Comparing the disc fraction in Taurus to young massive clusters suggests discs survive longer in this low density environment. We also present a method... Read More about The Age of Taurus: Environmental Effects on Disc Lifetimes.

Star Formation in the Eagle Nebula and NGC 6611 (2006)
Presentation / Conference Contribution
Oliveira, J. M., Jeffries, R. D., & van Loon, J. T. Star Formation in the Eagle Nebula and NGC 6611. Presented at Triggered Star Formation in a Turbulent ISM

We present IZJHKL' photometry of the core of the cluster NGC 6611 in the Eagle Nebula. This photometry is used to constrain the Initial Mass Function (IMF) and the circumstellar disk frequency of the young stellar objects. Optical spectroscopy of 258... Read More about Star Formation in the Eagle Nebula and NGC 6611.

Young stars and their circumstellar disks in the Sigma Orionis cluster (2004)
Presentation / Conference Contribution
M. Oliveira, J., D. Jeffries, R., Th. van Loon, J., & J. Kenyon, M. (2003, April). Young stars and their circumstellar disks in the Sigma Orionis cluster. Presented at Open Issues in Local Star Formation and Early Stellar Evolution, Ouro Preto, Minas Gerais, Brazil

The sigma Orionis cluster is a young association evolving under the disruptive influence of its massive O-star namesake. We are analysing this cluster as part of a program to characterise the influence of O-stars on the early stages of stellar evolut... Read More about Young stars and their circumstellar disks in the Sigma Orionis cluster.

The Li Overabundance of J37: Diffusion or Accretion? (2004)
Presentation / Conference Contribution
F. Ashwell, J., Jeffries, R. D., Smalley, B., P. Deliyannis, C., Steinhauer, A., & R. King, J. The Li Overabundance of J37: Diffusion or Accretion?. Presented at Proceedings of the International Astronomical Union

In September 2002 the discovery of a super Li-rich F-dwarf (J37) in NGC 6633, an iron poor analogue of the better studied Hyades and Praecepe open clusters, was announced. This unique star was thought to be the smoking gun for the action of diffusion... Read More about The Li Overabundance of J37: Diffusion or Accretion?.