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TTF Survey of Galaxy Populations

Published online by Cambridge University Press:  05 March 2013

Heath Jones  and
Joss Bland-Hawthorn
Heath Jones
Affiliation:
Mount Stromlo & Siding Spring Observatories, Private Bag, Weston Creek PO, ACT 2611, Australia; [email protected]
Joss Bland-Hawthorn
Affiliation:
Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia; [email protected]
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Abstract

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The TAURUS Tunable Filter (TTF) affords a new approach to observational cosmology, allowing a wide field (10 arcmin) to be imaged monochromatically in contiguous wavelength intervals (6–60 Å bandpass) over the R and I bands. In a 200 s exposure with the AAT, the TTF can detect Hα emission powered by star formation rates as low as 0·1 M⊙ yr−1 at z = 0·08 and 1 M⊙ yr−1 at z = 0·24 in 2 arcsec seeing (cf. 0·26 M⊙ yr−1 for the LMC). In this paper we describe an emission-line survey currently under way using the TTF on the AAT to detect redshifted Hα over the ranges z = 0·06–0·1 and z = 0·22–0·26. Such detections will be of timely interest to the Southern HI Sky Survey which is motivated along similar lines.

Keywords

cosmology: observationsgalaxies: surveysgalaxies: emission-lineinstrumentation: Fabry–Perot
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 14 , Issue 1 , 1997 , pp. 8 - 10
Copyright
Copyright © Astronomical Society of Australia 1997

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