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Bright Lyman-alpha Emitters at z~9: constraints on the luminosity function from HiZELS

(2009)

Authors:

D Sobral, PN Best, JE Geach, Ian Smail, J Kurk, M Cirasuolo, M Casali, RJ Ivison, K Coppin, GB Dalton
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The monitor project: A search for low mass ebs in the young open cluster M50

Aip Conference Proceedings 1094 (2009) 832-835

Authors:

JL Birkby, ST Hodgkin, S Aigrain, J Irwin

Abstract:

We present preliminary results from a high-cadence photometric monitoring survey of the 130 Myr old open cluster M50. Using the semi-automated occultation detection process developed by Miller et al. [1], we uncovered eight low mass (< 1M⊙) eclipsing binary candidates in the cluster. Preliminary analysis of spectroscopic follow-up on five of these candidates confirms their binary nature. One candidate also exhibits a systemic velocity broadly consistent with the cluster radial velocity, indicating cluster membership. Confirmation of these eight candidates as true members of the M50 cluster will allow us to provide important constraints to the mass-radius relationship for objects below 1M⊙ at ages younger than lGyr, where current observations remain scarce. © 2009 American Institute of Physics.
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HiZELS: a high redshift survey of H-alpha emitters. II: the nature of star-forming galaxies at z=0.84

(2009)

Authors:

D Sobral, PN Best, JE Geach, Ian Smail, J Kurk, M Cirasuolo, M Casali, RJ Ivison, K Coppin, GB Dalton
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Study of the Radiation Hardness of Vcsel and Pin Arrays

ArXiv 0901.0727 (2009)
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A digital broadband beamforming architecture for 2-PAD

Proceedings of Science 132 (2009) 273-277

Authors:

R Armstrong, J Hickish, KZ Adami, ME Jones

Abstract:

The development of densely-packed, all-digital aperture arrays is an important area of research required for the Square Kilometre Array (SKA) radio telescope. The design of real-time signal processing systems for digital aperture arrays is currently a central challenge in pathfinder projects worldwide. We describe an hierarchical, frequency-domain beamforming architecture for synthesising a sky beam from the wideband antenna feeds of digital aperture arrays. In particular this work describes a specific implementation of the beamforming architecture to the 2-Polarisation All-Digital (2-PAD) aperture array demonstrator.