Astronomical instrumentation

Research group

Research theme

Sub department

About

Compact broadband planar orthomode transducer

ArXiv 0709.1777 (2007)

Authors:

PK Grimes, OG King, G Yassin, ME Jones

Abstract:

We present the design and test results of a compact C-band orthomode transducer which comprises four rectangular probes orthogonally arranged in a circular waveguide, designed to work in the WG13 band. Measurements of the system in the frequency range 4.64 GHz to 7.05 GHz agree very well with simulation results and show a cross-polarisation level below -58 dB, a return loss of about -20 dB, and an insertion loss difference of less than 0.18 dB between the orthogonal polarisation modes across the full waveguide band.
Details from ArXiV
More details from the publisher
More details

The Physical Properties of LBGs at z>5: Outflows and the "pre-enrichment problem"

(2007)

Authors:

MD Lehnert, M Bremer, A Verma, L Douglas, N Forster Schreiber
More details from the publisher

The SAURON project - IX. A kinematic classification for early-type galaxies

Monthly Notices of the Royal Astronomical Society 379 (2007) 401-417

Authors:

RL Davies, Eric Emsellem, Michele Cappellari, Davor Krajnovic
More details from the publisher
More details
Details from ArXiV

The SAURON project - X. The orbital anisotropy of elliptical and lenticular galaxies: revisiting the (V/sigma,epsilon) diagram with integral-field stellar kinematics

Monthly Notices of the Royal Astronomical Society 379:2 (2007) 418-444

Authors:

M Cappellari, Bacon, R., Bureau, M., Emsellem, E.
More details from the publisher
More details
Details from ArXiV

Revisiting the (V/sigma)-epsilon anisotropy diagram of early-type galaxies using integral-field kinematics

(2007)

Authors:

Michele Cappellari, R Bacon, Martin Bureau, RL Davies, PTD Zeeuw, E Emsellem, J Falcon-Barroso, D Krajnovic, H Kuntschner, RM McDermid, RF Peletier, M Sarzi, RCEVD Bosch, GVD Ven

Abstract:

We use integral-field observation of the stellar kinematics obtained with SAURON in combination with Schwarzschild dynamical models to revisit our understanding of the classic (V /σ) − ε anisotropy diagram of early-type galaxies.
Details from ORA
Details from ArXiV
More details