Herschel-atlas

A binary HyLIRG pinpointing a cluster of starbursting protoellipticals

R. J. Ivison, A. M. Swinbank, Ian Smail, A. I. Harris, R. S. Bussmann, A. Cooray, P. Cox, H. Fu, A. Kovács, M. Krips, D. Narayanan, M. Negrello, R. Neri, J. Peñarrubia, J. Richard, D. A. Riechers, K. Rowlands, J. G. Staguhn, T. A. Targett, S. Amber & 31 others Andrew Baker, N. Bourne, F. Bertoldi, M. Bremer, J. A. Calanog, D. L. Clements, H. Dannerbauer, A. Dariush, G. De Zotti, L. Dunne, S. A. Eales, D. Farrah, S. Fleuren, A. Franceschini, J. E. Geach, R. D. George, J. C. Helly, R. Hopwood, E. Ibar, M. J. Jarvis, J. P. Kneib, S. Maddox, A. Omont, D. Scott, S. Serjeant, M. W.L. Smith, M. A. Thompson, E. Valiante, I. Valtchanov, J. Vieira, P. Van Der Werf

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

Panchromatic observations of the best candidate hyperluminous infrared galaxies from the widest Herschel extragalactic imaging survey have led to the discovery of at least four intrinsically luminous z = 2.41 galaxies across an ≈100 kpc region - a cluster of starbursting protoellipticals. Via subarcsecond interferometric imaging we have measured accurate gas and star formation surface densities. The two brightest galaxies span ∼3 kpc FWHM in submillimeter/radio continuum and CO J = 4-3, and double that in CO J = 1-0. The broad CO line is due partly to the multitude of constituent galaxies and partly to large rotational velocities in two counter-rotating gas disks - a scenario predicted to lead to the most intense starbursts, which will therefore come in pairs. The disks have M dyn of several × 1011 M o, and gas fractions of ∼40%. Velocity dispersions are modest so the disks are unstable, potentially on scales commensurate with their radii: these galaxies are undergoing extreme bursts of star formation, not confined to their nuclei, at close to the Eddington limit. Their specific star formation rates place them ≳ 5 × above the main sequence, which supposedly comprises large gas disks like these. Their high star formation efficiencies are difficult to reconcile with a simple volumetric star formation law. N-body and dark matter simulations suggest that this system is the progenitor of a B(inary)-type ≈1014.6- o cluster.

Original languageEnglish (US)
Article number137
JournalAstrophysical Journal
Volume772
Issue number2
DOIs
StatePublished - Aug 1 2013

Fingerprint

atlas
star formation
galaxies
gas
gases
star formation rate
radio
bursts
dark matter
counters
continuums
nuclei
radii
simulation

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • galaxies: high-redshift
  • galaxies: starburst
  • infrared: galaxies
  • radio continuum: galaxies
  • radio lines: galaxies
  • submillimeter: galaxies

Cite this

Ivison, R. J., Swinbank, A. M., Smail, I., Harris, A. I., Bussmann, R. S., Cooray, A., ... Van Der Werf, P. (2013). Herschel-atlas: A binary HyLIRG pinpointing a cluster of starbursting protoellipticals. Astrophysical Journal, 772(2), [137]. https://doi.org/10.1088/0004-637X/772/2/137
Ivison, R. J. ; Swinbank, A. M. ; Smail, Ian ; Harris, A. I. ; Bussmann, R. S. ; Cooray, A. ; Cox, P. ; Fu, H. ; Kovács, A. ; Krips, M. ; Narayanan, D. ; Negrello, M. ; Neri, R. ; Peñarrubia, J. ; Richard, J. ; Riechers, D. A. ; Rowlands, K. ; Staguhn, J. G. ; Targett, T. A. ; Amber, S. ; Baker, Andrew ; Bourne, N. ; Bertoldi, F. ; Bremer, M. ; Calanog, J. A. ; Clements, D. L. ; Dannerbauer, H. ; Dariush, A. ; De Zotti, G. ; Dunne, L. ; Eales, S. A. ; Farrah, D. ; Fleuren, S. ; Franceschini, A. ; Geach, J. E. ; George, R. D. ; Helly, J. C. ; Hopwood, R. ; Ibar, E. ; Jarvis, M. J. ; Kneib, J. P. ; Maddox, S. ; Omont, A. ; Scott, D. ; Serjeant, S. ; Smith, M. W.L. ; Thompson, M. A. ; Valiante, E. ; Valtchanov, I. ; Vieira, J. ; Van Der Werf, P. / Herschel-atlas : A binary HyLIRG pinpointing a cluster of starbursting protoellipticals. In: Astrophysical Journal. 2013 ; Vol. 772, No. 2.
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abstract = "Panchromatic observations of the best candidate hyperluminous infrared galaxies from the widest Herschel extragalactic imaging survey have led to the discovery of at least four intrinsically luminous z = 2.41 galaxies across an ≈100 kpc region - a cluster of starbursting protoellipticals. Via subarcsecond interferometric imaging we have measured accurate gas and star formation surface densities. The two brightest galaxies span ∼3 kpc FWHM in submillimeter/radio continuum and CO J = 4-3, and double that in CO J = 1-0. The broad CO line is due partly to the multitude of constituent galaxies and partly to large rotational velocities in two counter-rotating gas disks - a scenario predicted to lead to the most intense starbursts, which will therefore come in pairs. The disks have M dyn of several × 1011 M o, and gas fractions of ∼40{\%}. Velocity dispersions are modest so the disks are unstable, potentially on scales commensurate with their radii: these galaxies are undergoing extreme bursts of star formation, not confined to their nuclei, at close to the Eddington limit. Their specific star formation rates place them ≳ 5 × above the main sequence, which supposedly comprises large gas disks like these. Their high star formation efficiencies are difficult to reconcile with a simple volumetric star formation law. N-body and dark matter simulations suggest that this system is the progenitor of a B(inary)-type ≈1014.6- o cluster.",
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Ivison, RJ, Swinbank, AM, Smail, I, Harris, AI, Bussmann, RS, Cooray, A, Cox, P, Fu, H, Kovács, A, Krips, M, Narayanan, D, Negrello, M, Neri, R, Peñarrubia, J, Richard, J, Riechers, DA, Rowlands, K, Staguhn, JG, Targett, TA, Amber, S, Baker, A, Bourne, N, Bertoldi, F, Bremer, M, Calanog, JA, Clements, DL, Dannerbauer, H, Dariush, A, De Zotti, G, Dunne, L, Eales, SA, Farrah, D, Fleuren, S, Franceschini, A, Geach, JE, George, RD, Helly, JC, Hopwood, R, Ibar, E, Jarvis, MJ, Kneib, JP, Maddox, S, Omont, A, Scott, D, Serjeant, S, Smith, MWL, Thompson, MA, Valiante, E, Valtchanov, I, Vieira, J & Van Der Werf, P 2013, 'Herschel-atlas: A binary HyLIRG pinpointing a cluster of starbursting protoellipticals', Astrophysical Journal, vol. 772, no. 2, 137. https://doi.org/10.1088/0004-637X/772/2/137

Herschel-atlas : A binary HyLIRG pinpointing a cluster of starbursting protoellipticals. / Ivison, R. J.; Swinbank, A. M.; Smail, Ian; Harris, A. I.; Bussmann, R. S.; Cooray, A.; Cox, P.; Fu, H.; Kovács, A.; Krips, M.; Narayanan, D.; Negrello, M.; Neri, R.; Peñarrubia, J.; Richard, J.; Riechers, D. A.; Rowlands, K.; Staguhn, J. G.; Targett, T. A.; Amber, S.; Baker, Andrew; Bourne, N.; Bertoldi, F.; Bremer, M.; Calanog, J. A.; Clements, D. L.; Dannerbauer, H.; Dariush, A.; De Zotti, G.; Dunne, L.; Eales, S. A.; Farrah, D.; Fleuren, S.; Franceschini, A.; Geach, J. E.; George, R. D.; Helly, J. C.; Hopwood, R.; Ibar, E.; Jarvis, M. J.; Kneib, J. P.; Maddox, S.; Omont, A.; Scott, D.; Serjeant, S.; Smith, M. W.L.; Thompson, M. A.; Valiante, E.; Valtchanov, I.; Vieira, J.; Van Der Werf, P.

In: Astrophysical Journal, Vol. 772, No. 2, 137, 01.08.2013.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Herschel-atlas

T2 - A binary HyLIRG pinpointing a cluster of starbursting protoellipticals

AU - Ivison, R. J.

AU - Swinbank, A. M.

AU - Smail, Ian

AU - Harris, A. I.

AU - Bussmann, R. S.

AU - Cooray, A.

AU - Cox, P.

AU - Fu, H.

AU - Kovács, A.

AU - Krips, M.

AU - Narayanan, D.

AU - Negrello, M.

AU - Neri, R.

AU - Peñarrubia, J.

AU - Richard, J.

AU - Riechers, D. A.

AU - Rowlands, K.

AU - Staguhn, J. G.

AU - Targett, T. A.

AU - Amber, S.

AU - Baker, Andrew

AU - Bourne, N.

AU - Bertoldi, F.

AU - Bremer, M.

AU - Calanog, J. A.

AU - Clements, D. L.

AU - Dannerbauer, H.

AU - Dariush, A.

AU - De Zotti, G.

AU - Dunne, L.

AU - Eales, S. A.

AU - Farrah, D.

AU - Fleuren, S.

AU - Franceschini, A.

AU - Geach, J. E.

AU - George, R. D.

AU - Helly, J. C.

AU - Hopwood, R.

AU - Ibar, E.

AU - Jarvis, M. J.

AU - Kneib, J. P.

AU - Maddox, S.

AU - Omont, A.

AU - Scott, D.

AU - Serjeant, S.

AU - Smith, M. W.L.

AU - Thompson, M. A.

AU - Valiante, E.

AU - Valtchanov, I.

AU - Vieira, J.

AU - Van Der Werf, P.

PY - 2013/8/1

Y1 - 2013/8/1

N2 - Panchromatic observations of the best candidate hyperluminous infrared galaxies from the widest Herschel extragalactic imaging survey have led to the discovery of at least four intrinsically luminous z = 2.41 galaxies across an ≈100 kpc region - a cluster of starbursting protoellipticals. Via subarcsecond interferometric imaging we have measured accurate gas and star formation surface densities. The two brightest galaxies span ∼3 kpc FWHM in submillimeter/radio continuum and CO J = 4-3, and double that in CO J = 1-0. The broad CO line is due partly to the multitude of constituent galaxies and partly to large rotational velocities in two counter-rotating gas disks - a scenario predicted to lead to the most intense starbursts, which will therefore come in pairs. The disks have M dyn of several × 1011 M o, and gas fractions of ∼40%. Velocity dispersions are modest so the disks are unstable, potentially on scales commensurate with their radii: these galaxies are undergoing extreme bursts of star formation, not confined to their nuclei, at close to the Eddington limit. Their specific star formation rates place them ≳ 5 × above the main sequence, which supposedly comprises large gas disks like these. Their high star formation efficiencies are difficult to reconcile with a simple volumetric star formation law. N-body and dark matter simulations suggest that this system is the progenitor of a B(inary)-type ≈1014.6- o cluster.

AB - Panchromatic observations of the best candidate hyperluminous infrared galaxies from the widest Herschel extragalactic imaging survey have led to the discovery of at least four intrinsically luminous z = 2.41 galaxies across an ≈100 kpc region - a cluster of starbursting protoellipticals. Via subarcsecond interferometric imaging we have measured accurate gas and star formation surface densities. The two brightest galaxies span ∼3 kpc FWHM in submillimeter/radio continuum and CO J = 4-3, and double that in CO J = 1-0. The broad CO line is due partly to the multitude of constituent galaxies and partly to large rotational velocities in two counter-rotating gas disks - a scenario predicted to lead to the most intense starbursts, which will therefore come in pairs. The disks have M dyn of several × 1011 M o, and gas fractions of ∼40%. Velocity dispersions are modest so the disks are unstable, potentially on scales commensurate with their radii: these galaxies are undergoing extreme bursts of star formation, not confined to their nuclei, at close to the Eddington limit. Their specific star formation rates place them ≳ 5 × above the main sequence, which supposedly comprises large gas disks like these. Their high star formation efficiencies are difficult to reconcile with a simple volumetric star formation law. N-body and dark matter simulations suggest that this system is the progenitor of a B(inary)-type ≈1014.6- o cluster.

KW - galaxies: high-redshift

KW - galaxies: starburst

KW - infrared: galaxies

KW - radio continuum: galaxies

KW - radio lines: galaxies

KW - submillimeter: galaxies

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U2 - 10.1088/0004-637X/772/2/137

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JF - Astrophysical Journal

SN - 0004-637X

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Ivison RJ, Swinbank AM, Smail I, Harris AI, Bussmann RS, Cooray A et al. Herschel-atlas: A binary HyLIRG pinpointing a cluster of starbursting protoellipticals. Astrophysical Journal. 2013 Aug 1;772(2). 137. https://doi.org/10.1088/0004-637X/772/2/137