Astronomical instrumentation

Research group

Research theme

Sub department

About

Stellar populations of early-type galaxies in the ATLAS3D sample

Aip Conference Proceedings 1111 (2009) 111-114

Authors:

P Serra, RM McDermid, K Alatalo, L Blitz, M Bois, F Bournaud, M Bureau, M Cappellari, RL Davies, TA Davis, PT De Zeeuw, E Emsellem, J Falcón-Barroso, S Khochfar, D Krajnović, H Kuntschner, PY Lablanche, R Morganti, T Naab, M Sarzi, N Scott, RCE Van Den Bosch, G Van De Ven, A Weijmans, LM Young

Abstract:

ATLAS3D is a multi-wavelength, volume-limited survey of 263 morphologicallyselected early-type galaxies within a distance of 42 Mpc and complete to MK ≤ -21.5. Here we present the ATLAS3D project and our first results on the stellar populations of galaxies in the ATLAS3Dsample based on SAURON integral-field spectroscopy. We show relations between integrated line-strength indices and stellar velocity dispersion o in the range 55 ≤ Σ(km/s) ≤ 350. We derive simple-stellar-population-equivalent age, metallicity and α/Fe abundance ratio and discuss their relation to stellar velocity dispersion, environment and galaxy internal kinematics. These preliminary results indicate that slow rotators tend to be older and have less variation in age than fast rotators. We also find that galaxies in lower density environments are on average younger than those in denser environments, as found by other authors. © 2009 American Institute of Physics.
More details from the publisher
More details

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
More details from the publisher

The Monitor Project: a search for low mass EBs in the young open cluster M50

AIP Conference Proceedings AIP Publishing 1094:1 (2009) 832-835

Authors:

JL Birkby, ST Hodgkin, S Aigrain, J Irwin, Eric Stempels
More details from the publisher
More details

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
More details from the publisher

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.