Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 421, Issue 1, Pages 872-893Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2011.20365.x
Keywords
instrumentation: spectrographs; techniques: imaging spectroscopy; surveys; galaxies: general; galaxies: kinematics and dynamics
Categories
Funding
- Australian Research Council (ARC) QEII [DP0666615]
- Australian Research Council [FT100100457]
- Australian Academy of Science
- National Science Foundation [DGE-1035963]
- [CE11E0090]
- Australian Research Council [FT100100457, DP0666615] Funding Source: Australian Research Council
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We demonstrate a novel technology that combines the power of the multi-object spectrograph with the spatial multiplex advantage of an integral field spectrograph (IFS). The Sydney-AAO (Australian Astronomical Observatory) Multi-object IFS (SAMI) is a prototype wide-field system at the Anglo-Australian Telescope (AAT) that allows 13 imaging fibre bundles ('hexabundles') to be deployed over a 1-degree diameter field of view. Each hexabundle comprises 61 lightly fused multi-mode fibres with reduced cladding and yields a 75 per cent filling factor. Each fibre core diameter subtends 1.6 arcsec on the sky and each hexabundle has a field of view of 15 arcsec diameter. The fibres are fed to the flexible AAOmega double-beam spectrograph, which can be used at a range of spectral resolutions (R = lambda/delta lambda approximate to 1700-13 000) over the optical spectrum (3700-9500 angstrom). We present the first spectroscopic results obtained with SAMI for a sample of galaxies at z approximate to 0.05. We discuss the prospects of implementing hexabundles at a much higher multiplex over wider fields of view in order to carry out spatially resolved spectroscopic surveys of 10(4)-10(5) galaxies.
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