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Title:
Gigamasers: the key to the dust-obscured star formation history of the Universe?
Authors:
Townsend, R. H. D.; Ivison, R. J.; Smail, Ian; Blain, A. W.; Frayer, D. T.
Affiliation:
AA(Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT ), AB(Astronomy Technology Centre, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ ), AC(Department of Physics, University of Durham, South Road, Durham DH1 3LE ), AD(Institute of Astronomy, Madingley Road, Cambridge CB3 0HA ), AE(SIRTF Science Center, California Institute of Technology, MS 314-6, Pasadena, CA 91125, USA)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 328, Issue 2, pp. L17-L20. (MNRAS Homepage)
Publication Date:
12/2001
Origin:
MNRAS
MNRAS Keywords:
GALAXIES: FORMATION, GALAXIES: STARBURST, COSMOLOGY: OBSERVATIONS, EARLY UNIVERSE
DOI:
10.1046/j.1365-8711.2001.05101.x
Bibliographic Code:
2001MNRAS.328L..17T

Abstract

We discuss the possibility of using OH and H2O gigamasers to trace the redshift distribution of luminous, dust-obscured, star-forming galaxies. It has long been thought that ultraluminous, interacting galaxies should host gigamasers, owing to their vast pumping infrared (IR) luminosity, the large column density of molecules available to populate the maser states and the turbulent motion of the gas in these dynamically complex systems, which allows unsaturated maser emission. OH masers may thus be well suited to the redshift-blind detection of ultraluminous and hyperluminous infrared galaxies (LFIR>=1012Lsolar) such as those uncovered by the SCUBA submillimetre camera. The bandwidth requirement is low, <1GHz for z=1-10 (lower still if additional redshift constraints are available) and the dual-line 1665-/1667-MHz OH spectral signature can act as a check on the reality of detections.

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