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; A. J. 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

doi:10.1088/0004-637X/772/2/137

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. AmberA. J. 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 journal › Article › peer-review

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 ≈10^14.6- _o cluster.

Original language	English (US)
Article number	137
Journal	Astrophysical Journal
Volume	772
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/772/2/137
State	Published - Aug 1 2013
Externally published	Yes

Keywords

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

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Online availability

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

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Ivison, R. J., Swinbank, A. M., Smail, I., 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., ... Van Der Werf, P. (2013). Herschel-atlas: A binary HyLIRG pinpointing a cluster of starbursting protoellipticals. Astrophysical Journal, 772(2), Article 137. https://doi.org/10.1088/0004-637X/772/2/137

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, AJ, 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

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title = "Herschel-atlas: A binary HyLIRG pinpointing a cluster of starbursting protoellipticals",

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.",

keywords = "galaxies: high-redshift, galaxies: starburst, infrared: galaxies, radio continuum: galaxies, radio lines: galaxies, submillimeter: galaxies",

author = "Ivison, {R. J.} and Swinbank, {A. M.} and Ian Smail and Harris, {A. I.} and Bussmann, {R. S.} and A. Cooray and P. Cox and H. Fu and A. Kov{\'a}cs and M. Krips and D. Narayanan and M. Negrello and R. Neri and J. Pe{\~n}arrubia and J. Richard and Riechers, {D. A.} and K. Rowlands and Staguhn, {J. G.} and Targett, {T. A.} and S. Amber and Baker, {A. J.} and N. Bourne and F. Bertoldi and M. Bremer and Calanog, {J. A.} and Clements, {D. L.} and H. Dannerbauer and A. Dariush and {De Zotti}, G. and L. Dunne and Eales, {S. A.} and D. Farrah and S. Fleuren and A. Franceschini and Geach, {J. E.} and George, {R. D.} and Helly, {J. C.} and R. Hopwood and E. Ibar and Jarvis, {M. J.} and Kneib, {J. P.} and S. Maddox and A. Omont and D. Scott and S. Serjeant and Smith, {M. W.L.} and Thompson, {M. A.} and E. Valiante and I. Valtchanov and J. Vieira and {Van Der Werf}, P.",

year = "2013",

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doi = "10.1088/0004-637X/772/2/137",

language = "English (US)",

volume = "772",

journal = "Astrophysical Journal",

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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, A. J.

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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Herschel-atlas: A binary HyLIRG pinpointing a cluster of starbursting protoellipticals

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