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J/A+A/496/45    CO maps of three lensed submillimetre galaxies  (Knudsen+, 2009)

New CO detections of lensed submillimetre galaxies in A2218: Probing molecular gas in the LIRG regime at high redshift. Knudsen K.K., Neri R., Kneib J.-P., van der Werf P.P. <Astron. Astrophys. 496, 45 (2009)> =2009A&A...496...45K
ADC_Keywords: Galaxies, radio ; Millimetric/submm sources ; Radio lines; Carbon monoxide Keywords: galaxies: evolution - galaxies: high-redshift - galaxies: ISM - galaxies: starburst Abstract: Submillimetre galaxies (SMGs) are distant, dusty galaxies undergoing star formation at prodigious rates. Recently there has been major progress in understanding the nature of the bright SMGs (i.e. S850um>5mJy). The samples for the fainter SMGs are small and are currently in a phase of being built up through identification studies. We study the molecular gas content in the two SMGs, SMMJ163555 and SMMJ163541, at redshifts z=1.034 and z=3.187 with unlensed submillimetre fluxes of 0.4mJy and 6.0mJy. Both SMGs are gravitationally lensed by the foreground cluster Abell 2218. We used the IRAM Plateau de Bure Interferometer to obtain observations at 3mm of the lines CO(2-1) for SMMJ163555 and CO(3-2) for SMMJ163541. Additionally, we obtained CO(4-3) observations for the candidate z=4.048 SMMJ163556 with an unlensed submillimetre flux of 2.7mJy. Results: The CO(2-1) line was detected for SMMJ163555 at redshift 1.0313 with an integrated line intensity of 1.2± and a line width of 410±120km/s. From this a gas mass of 1.6x109M is derived and a star formation efficiency of 440L/M estimated. The CO(3-2) line was detected for SMMJ163541 at redshift 3.1824, possibly with a second component at redshift 3.1883, with an integrated line intensity of 1.0± and a line width of 280±50km/s. From this a gas mass of 2.2x1010M is derived and a star formation efficiency of 1000L/M is estimated. For SMMJ163556, the CO(4-3) is undetected within the redshift range 4.035-4.082 down to a sensitivity of Description: The calibrated IRAM PdBI CO observations of the three high redshift SMGs, SMMJ163555, SMMJ163541, and SMMJ163556 are here available in fits format. The spectra cubes are given in RA, Dec, and velocity. The files are named according to the source. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file maps.dat 72 3 List of the maps fits/* 0 3 FITS maps
Byte-by-byte Description of file: maps.dat
Bytes Format Units Label Explanations
1- 12 A12 --- FileName Name of the FITS file in subdirectory fits 14- 16 A3 --- --- [SMM] 17- 32 A16 --- SMM Source name (JHHMMSS.S+DDMMSS) 34- 35 A2 --- --- [z=] 36- 39 F4.2 --- z Source redshift 41- 72 A32 --- Title Title of map
Acknowledgements: Kirsten K. Knudsen, knudsen(at)
(End) Kirsten K. Knudsen [Bonn, Germany], Patricia Vannier [CDS] 26-Jan-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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