2010A&A...518L..35I


Query : 2010A&A...518L..35I

2010A&A...518L..35I - Astronomy and Astrophysics, volume 518, L35-35 (2010/7-2)

Herschel and SCUBA-2 imaging and spectroscopy of a bright, lensed submillimetre galaxy at z = 2.3.

IVISON R.J., SWINBANK A.M., SWINYARD B., SMAIL I., PEARSON C.P., RIGOPOULOU D., POLEHAMPTON E., BALUTEAU J.-P., BARLOW M.J., BLAIN A.W., BOCK J., CLEMENTS D.L., COPPIN K., COORAY A., DANIELSON A., DWEK E., EDGE A.C., FRANCESCHINI A., FULTON T., GLENN J., GRIFFIN M., ISAAK K., LEEKS S., LIM T., NAYLOR D., OLIVER S.J., PAGE M.J., PEREZ-FOURNON I., ROWAN-ROBINSON M., SAVINI G., SCOTT D., SPENCER L., VALTCHANOV I., VIGROUX L. and WRIGHT G.S.

Abstract (from CDS):

We present a detailed analysis of the far-infrared (-IR) properties of the bright, lensed, z=2.3, submillimetre-selected galaxy (SMG), SMMJ2135-0102 (hereafter SMMJ2135), using new observations with Herschel, SCUBA-2 and the Very Large Array (VLA). These data allow us to constrain the galaxy's spectral energy distribution (SED) and show that it has an intrinsic rest-frame 8-1000-µm luminosity, Lbol, of (2.3±0.2)x1012L and a likely star-formation rate (SFR) of ∼400M/yr. The galaxy sits on the far-IR/radio correlation for far-IR-selected galaxies. At >70µm, the SED can be described adequately by dust components with dust temperatures, Td∼30 and 60k. Using SPIRE's Fourier- transform spectrometer (FTS) we report a detection of the [CII]158µm cooling line. If the [CII], CO and far-IR continuum arise in photo-dissociation regions (PDRs), we derive a characteristic gas density, n∼103/cm3, and a far-ultraviolet (-UV) radiation field, G0, 103 x stronger than the Milky Way. L[CII]/Lbol is significantly higher than in local ultra-luminous IR galaxies (ULIRGs) but similar to the values found in local star-forming galaxies and starburst nuclei. This is consistent with SMMJ2135 being powered by starburst clumps distributed across ∼2kpc, evidence that SMGs are not simply scaled-up ULIRGs. Our results show that SPIRE's FTS has the ability to measure the redshifts of distant, obscured galaxies via the blind detection of atomic cooling lines, but it will not be competitive with ground-based CO-line searches. It will, however, allow detailed study of the integrated properties of high-redshift galaxies, as well as the chemistry of their interstellar medium (ISM), once more suitably bright candidates have been found.

Abstract Copyright:

Journal keyword(s): galaxies: evolution - infrared: galaxies - infrared: ISM - radio continuum: galaxies - submillimeter: galaxies

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5583 6
2 NAME HBootes03 G 14 28 24.074 +35 26 19.35           ~ 34 0
3 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2822 4
4 NAME Eyelash LeG 21 35 11.60 -01 02 52.0           ~ 208 0
5 ClG J2135-0102 ClG 21 35 12.1 -01 02 57           ~ 37 0

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2022.05.25-03:44:42

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