AEGIS: Infrared spectroscopy of an infrared-luminous lyman break galaxy at z = 3.01

J. S. Huang; D. Rigopoulou; C. Papovich; M. L.N. Ashby; S. P. Willner; R. Ivison; E. S. Laird; T. Webb; G. Wilson; P. Barmby; S. Chapman; C. Conselice; B. McLeod; C. G. Shu; H. A. Smith; E. Le Floc'h; E. Egami; C. A.N. Willmer; G. G. Fazio

doi:10.1086/508567

AEGIS: Infrared spectroscopy of an infrared-luminous lyman break galaxy at z = 3.01

J. S. Huang, D. Rigopoulou, C. Papovich, M. L.N. Ashby, S. P. Willner, R. Ivison, E. S. Laird, T. Webb, G. Wilson, P. Barmby, S. Chapman, C. Conselice, B. McLeod, C. G. Shu, H. A. Smith, E. Le Floc'h, E. Egami, C. A.N. Willmer, G. G. Fazio

Steward Observatory

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

We report the detection of rest-frame 6.2 and 7.7 μm emission features arising from polycyclic aromatic hydrocarbons (PAHs) in the Spitzer IRS spectrum of an infrared-luminous Lyman break galaxy at z = 3.01. This is currently the highest redshift galaxy where these PAH emission features have been detected. The total IR luminosity inferred from the MIPS 24 μm and radio flux density is 2 × 10¹³ L_⊙, which qualifies this object as a so-called hyperluminous infrared galaxy (HyLIRG). However, unlike local HyLIRGs, which are generally associated with QSO/AGNs and have weak or absent PAH emission features, this HyLIRG has very strong 6.2 and 7.7 μm PAH emission. We argue that intense star formation dominates the IR emission of this source, although we cannot rule out the presence of a deeply obscured AGN. This LBG appears to be a distorted system in the HST ACS F606W and F814W images, possibly indicating that a significant merger or interaction is driving the large IR luminosity.

Original language	English (US)
Pages (from-to)	L69-L72
Journal	Astrophysical Journal
Volume	660
Issue number	1 II
DOIs	https://doi.org/10.1086/508567
State	Published - May 1 2007

Keywords

Cosmology: observations
Galaxies: high-redshift
Galaxies: starburst
Infrared: galaxies

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/508567

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Huang, J. S., Rigopoulou, D., Papovich, C., Ashby, M. L. N., Willner, S. P., Ivison, R., Laird, E. S., Webb, T., Wilson, G., Barmby, P., Chapman, S., Conselice, C., McLeod, B., Shu, C. G., Smith, H. A., Le Floc'h, E., Egami, E., Willmer, C. A. N., & Fazio, G. G. (2007). AEGIS: Infrared spectroscopy of an infrared-luminous lyman break galaxy at z = 3.01. Astrophysical Journal, 660(1 II), L69-L72. https://doi.org/10.1086/508567

Huang, JS, Rigopoulou, D, Papovich, C, Ashby, MLN, Willner, SP, Ivison, R, Laird, ES, Webb, T, Wilson, G, Barmby, P, Chapman, S, Conselice, C, McLeod, B, Shu, CG, Smith, HA, Le Floc'h, E, Egami, E , Willmer, CAN & Fazio, GG 2007, 'AEGIS: Infrared spectroscopy of an infrared-luminous lyman break galaxy at z = 3.01', Astrophysical Journal, vol. 660, no. 1 II, pp. L69-L72. https://doi.org/10.1086/508567

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title = "AEGIS: Infrared spectroscopy of an infrared-luminous lyman break galaxy at z = 3.01",

abstract = "We report the detection of rest-frame 6.2 and 7.7 μm emission features arising from polycyclic aromatic hydrocarbons (PAHs) in the Spitzer IRS spectrum of an infrared-luminous Lyman break galaxy at z = 3.01. This is currently the highest redshift galaxy where these PAH emission features have been detected. The total IR luminosity inferred from the MIPS 24 μm and radio flux density is 2 × 1013 L⊙, which qualifies this object as a so-called hyperluminous infrared galaxy (HyLIRG). However, unlike local HyLIRGs, which are generally associated with QSO/AGNs and have weak or absent PAH emission features, this HyLIRG has very strong 6.2 and 7.7 μm PAH emission. We argue that intense star formation dominates the IR emission of this source, although we cannot rule out the presence of a deeply obscured AGN. This LBG appears to be a distorted system in the HST ACS F606W and F814W images, possibly indicating that a significant merger or interaction is driving the large IR luminosity.",

keywords = "Cosmology: observations, Galaxies: high-redshift, Galaxies: starburst, Infrared: galaxies",

author = "Huang, {J. S.} and D. Rigopoulou and C. Papovich and Ashby, {M. L.N.} and Willner, {S. P.} and R. Ivison and Laird, {E. S.} and T. Webb and G. Wilson and P. Barmby and S. Chapman and C. Conselice and B. McLeod and Shu, {C. G.} and Smith, {H. A.} and {Le Floc'h}, E. and E. Egami and Willmer, {C. A.N.} and Fazio, {G. G.}",

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doi = "10.1086/508567",

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T2 - Infrared spectroscopy of an infrared-luminous lyman break galaxy at z = 3.01

AU - Huang, J. S.

AU - Rigopoulou, D.

AU - Papovich, C.

AU - Ashby, M. L.N.

AU - Willner, S. P.

AU - Ivison, R.

AU - Laird, E. S.

AU - Webb, T.

AU - Wilson, G.

AU - Barmby, P.

AU - Chapman, S.

AU - Conselice, C.

AU - McLeod, B.

AU - Shu, C. G.

AU - Smith, H. A.

AU - Le Floc'h, E.

AU - Egami, E.

AU - Willmer, C. A.N.

AU - Fazio, G. G.

PY - 2007/5/1

Y1 - 2007/5/1

N2 - We report the detection of rest-frame 6.2 and 7.7 μm emission features arising from polycyclic aromatic hydrocarbons (PAHs) in the Spitzer IRS spectrum of an infrared-luminous Lyman break galaxy at z = 3.01. This is currently the highest redshift galaxy where these PAH emission features have been detected. The total IR luminosity inferred from the MIPS 24 μm and radio flux density is 2 × 1013 L⊙, which qualifies this object as a so-called hyperluminous infrared galaxy (HyLIRG). However, unlike local HyLIRGs, which are generally associated with QSO/AGNs and have weak or absent PAH emission features, this HyLIRG has very strong 6.2 and 7.7 μm PAH emission. We argue that intense star formation dominates the IR emission of this source, although we cannot rule out the presence of a deeply obscured AGN. This LBG appears to be a distorted system in the HST ACS F606W and F814W images, possibly indicating that a significant merger or interaction is driving the large IR luminosity.

AB - We report the detection of rest-frame 6.2 and 7.7 μm emission features arising from polycyclic aromatic hydrocarbons (PAHs) in the Spitzer IRS spectrum of an infrared-luminous Lyman break galaxy at z = 3.01. This is currently the highest redshift galaxy where these PAH emission features have been detected. The total IR luminosity inferred from the MIPS 24 μm and radio flux density is 2 × 1013 L⊙, which qualifies this object as a so-called hyperluminous infrared galaxy (HyLIRG). However, unlike local HyLIRGs, which are generally associated with QSO/AGNs and have weak or absent PAH emission features, this HyLIRG has very strong 6.2 and 7.7 μm PAH emission. We argue that intense star formation dominates the IR emission of this source, although we cannot rule out the presence of a deeply obscured AGN. This LBG appears to be a distorted system in the HST ACS F606W and F814W images, possibly indicating that a significant merger or interaction is driving the large IR luminosity.

KW - Cosmology: observations

KW - Galaxies: high-redshift

KW - Galaxies: starburst

KW - Infrared: galaxies

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JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

ER -

AEGIS: Infrared spectroscopy of an infrared-luminous lyman break galaxy at z = 3.01

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Keywords

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