Skip to main content

Research Repository

Advanced Search

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.; Pérez Fournon, I.; Rowan-Robinson, M.; Savini, G.; Scott, D.; Spencer, L.; Valtchanov, I.; Vigroux, L.; Wright, G.S.

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


R.J. Ivison

A.M. Swinbank

B. Swinyard

C.P. Pearson

D. Rigopoulou

E. Polehampton

J.-P. Baluteau

M.J. Barlow

A.W. Blain

J. Bock

D.L. Clements

K. Coppin

A. Cooray

A. Danielson

E. Dwek

A. Franceschini

T. Fulton

J. Glenn

M. Griffin

K. Isaak

S. Leeks

T. Lim

D. Naylor

S.J. Oliver

M.J. Page

I. Pérez Fournon

M. Rowan-Robinson

G. Savini

D. Scott

L. Spencer

I. Valtchanov

L. Vigroux

G.S. Wright


We present a detailed analysis of the far-infrared (-IR) properties of the bright, lensed, z = 2.3, submillimetre-selected galaxy (SMG), SMM J2135-0102 (hereafter SMM J2135), 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) × 1012 and a likely star-formation rate (SFR) of ~400 yr-1. The galaxy sits on the far-IR/radio correlation for far-IR-selected galaxies. At 70 μm, the SED can be described adequately by dust components with dust temperatures, Td ~ 30 and 60 k. Using SPIRE's Fourier- transform spectrometer (FTS) we report a detection of the [C ii] 158 μm cooling line. If the [C ii], CO and far-IR continuum arise in photo-dissociation regions (PDRs), we derive a characteristic gas density, n ~ 103 cm-3, and a far-ultraviolet (-UV) radiation field, G0, 103× 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 SMM J2135 being powered by starburst clumps distributed across ~2 kpc, 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.


Ivison, R., Swinbank, A., Swinyard, B., Smail, I., Pearson, C., Rigopoulou, D., …Wright, G. (2010). Herschel and SCUBA-2 imaging and spectroscopy of a bright, lensed submillimetre galaxy at z = 2.3. Astronomy & Astrophysics, 518, Article L35.

Journal Article Type Article
Publication Date Jul 1, 2010
Deposit Date May 28, 2013
Publicly Available Date Jun 14, 2013
Journal Astronomy and astrophysics.
Print ISSN 0004-6361
Electronic ISSN 1432-0746
Publisher EDP Sciences
Peer Reviewed Peer Reviewed
Volume 518
Article Number L35
Keywords Galaxies, Evolution, Infrared, ISM, Radio continuum, Submillimeter.


Published Journal Article (385 Kb)

Copyright Statement
The original publication is available at

You might also like

Downloadable Citations