A bright, dust-obscured, millimetre-selected galaxy beyond the Bullet Cluster (1E0657-56)

G. W. Wilson, D. H. Hughes, I. Aretxaga, H. Ezawa, J. E. Austermann, S. Doyle, D. Ferrusca, I. Hernández-Curiel, R. Kawabe, T. Kitayama, K. Kohno, A. Kuboi, H. Matsuo, P. D. Mauskopf, Y. Murakoshi, A. Montaña, P. Natarajan, T. Oshima, N. Ota, T. A. PereraJ. Rand, K. S. Scott, Kunihiko Tanaka, M. Tsuboi, C. C. Williams, N. Yamaguchi, M. S. Yun

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Deep 1.1 mm continuum observations of 1E0657-56 (the 'Bullet Cluster') taken with the millimeter-wavelength camera AzTEC on the 10-m Atacama Submillimeter Telescope Experiment (ASTE), have revealed an extremely bright (S1.1 mm = 15.9 mJy) unresolved source. This source, MMJ065837-5557.0, lies close to a maximum in the density of underlying mass distribution, towards the larger of the two interacting clusters as traced by the weak-lensing analysis of Clowe et al. Using optical-infrared (IR) colours, we argue that MMJ065837-5557.0 lies at a redshift of z = 2.7 ± 0.2. A lensing-derived mass model for the Bullet Cluster shows a critical line (caustic) of magnification within a few arcsec of the AzTEC source, sufficient to amplify the intrinsic millimetre-wavelength flux of the AzTEC galaxy by a factor of ≫20. After subtraction of the foreground cluster emission at 1.1 mm due to the Sunyaev-Zel'dovich effect, and correcting for the magnification, the rest-frame far-IR luminosity of MMJ065837-5557.0 is ≤1012 L , characteristic of a luminous infrared galaxy (LIRG). We explore various scenarios to explain the colours, morphologies and positional offsets between the potential optical and IR counterparts, and their relationship with MMJ065837-5557.0. Until higher resolution and more sensitive (sub)millimetre observations are available, the detection of background galaxies close to the caustics of massive lensing clusters offers the only opportunity to study this intrinsically faint millimetre-galaxy population.

Original languageEnglish
Pages (from-to)1061-1070
Number of pages10
JournalMonthly Notices of the Royal Astronomical Society
Volume390
Issue number3
DOIs
Publication statusPublished - 2008 Nov
Externally publishedYes

Fingerprint

dust
galaxies
wavelength
magnification
caustic lines
color
mass distribution
subtraction
wavelengths
experiment
alkalies
cameras
luminosity
telescopes
continuums
high resolution
detection
distribution
analysis
effect

Keywords

  • Galaxies: high-redshift
  • Galaxies: starburst

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Wilson, G. W., Hughes, D. H., Aretxaga, I., Ezawa, H., Austermann, J. E., Doyle, S., ... Yun, M. S. (2008). A bright, dust-obscured, millimetre-selected galaxy beyond the Bullet Cluster (1E0657-56). Monthly Notices of the Royal Astronomical Society, 390(3), 1061-1070. https://doi.org/10.1111/j.1365-2966.2008.13774.x

A bright, dust-obscured, millimetre-selected galaxy beyond the Bullet Cluster (1E0657-56). / Wilson, G. W.; Hughes, D. H.; Aretxaga, I.; Ezawa, H.; Austermann, J. E.; Doyle, S.; Ferrusca, D.; Hernández-Curiel, I.; Kawabe, R.; Kitayama, T.; Kohno, K.; Kuboi, A.; Matsuo, H.; Mauskopf, P. D.; Murakoshi, Y.; Montaña, A.; Natarajan, P.; Oshima, T.; Ota, N.; Perera, T. A.; Rand, J.; Scott, K. S.; Tanaka, Kunihiko; Tsuboi, M.; Williams, C. C.; Yamaguchi, N.; Yun, M. S.

In: Monthly Notices of the Royal Astronomical Society, Vol. 390, No. 3, 11.2008, p. 1061-1070.

Research output: Contribution to journalArticle

Wilson, GW, Hughes, DH, Aretxaga, I, Ezawa, H, Austermann, JE, Doyle, S, Ferrusca, D, Hernández-Curiel, I, Kawabe, R, Kitayama, T, Kohno, K, Kuboi, A, Matsuo, H, Mauskopf, PD, Murakoshi, Y, Montaña, A, Natarajan, P, Oshima, T, Ota, N, Perera, TA, Rand, J, Scott, KS, Tanaka, K, Tsuboi, M, Williams, CC, Yamaguchi, N & Yun, MS 2008, 'A bright, dust-obscured, millimetre-selected galaxy beyond the Bullet Cluster (1E0657-56)', Monthly Notices of the Royal Astronomical Society, vol. 390, no. 3, pp. 1061-1070. https://doi.org/10.1111/j.1365-2966.2008.13774.x
Wilson, G. W. ; Hughes, D. H. ; Aretxaga, I. ; Ezawa, H. ; Austermann, J. E. ; Doyle, S. ; Ferrusca, D. ; Hernández-Curiel, I. ; Kawabe, R. ; Kitayama, T. ; Kohno, K. ; Kuboi, A. ; Matsuo, H. ; Mauskopf, P. D. ; Murakoshi, Y. ; Montaña, A. ; Natarajan, P. ; Oshima, T. ; Ota, N. ; Perera, T. A. ; Rand, J. ; Scott, K. S. ; Tanaka, Kunihiko ; Tsuboi, M. ; Williams, C. C. ; Yamaguchi, N. ; Yun, M. S. / A bright, dust-obscured, millimetre-selected galaxy beyond the Bullet Cluster (1E0657-56). In: Monthly Notices of the Royal Astronomical Society. 2008 ; Vol. 390, No. 3. pp. 1061-1070.
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abstract = "Deep 1.1 mm continuum observations of 1E0657-56 (the 'Bullet Cluster') taken with the millimeter-wavelength camera AzTEC on the 10-m Atacama Submillimeter Telescope Experiment (ASTE), have revealed an extremely bright (S1.1 mm = 15.9 mJy) unresolved source. This source, MMJ065837-5557.0, lies close to a maximum in the density of underlying mass distribution, towards the larger of the two interacting clusters as traced by the weak-lensing analysis of Clowe et al. Using optical-infrared (IR) colours, we argue that MMJ065837-5557.0 lies at a redshift of z = 2.7 ± 0.2. A lensing-derived mass model for the Bullet Cluster shows a critical line (caustic) of magnification within a few arcsec of the AzTEC source, sufficient to amplify the intrinsic millimetre-wavelength flux of the AzTEC galaxy by a factor of ≫20. After subtraction of the foreground cluster emission at 1.1 mm due to the Sunyaev-Zel'dovich effect, and correcting for the magnification, the rest-frame far-IR luminosity of MMJ065837-5557.0 is ≤1012 L ⊙, characteristic of a luminous infrared galaxy (LIRG). We explore various scenarios to explain the colours, morphologies and positional offsets between the potential optical and IR counterparts, and their relationship with MMJ065837-5557.0. Until higher resolution and more sensitive (sub)millimetre observations are available, the detection of background galaxies close to the caustics of massive lensing clusters offers the only opportunity to study this intrinsically faint millimetre-galaxy population.",
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T1 - A bright, dust-obscured, millimetre-selected galaxy beyond the Bullet Cluster (1E0657-56)

AU - Wilson, G. W.

AU - Hughes, D. H.

AU - Aretxaga, I.

AU - Ezawa, H.

AU - Austermann, J. E.

AU - Doyle, S.

AU - Ferrusca, D.

AU - Hernández-Curiel, I.

AU - Kawabe, R.

AU - Kitayama, T.

AU - Kohno, K.

AU - Kuboi, A.

AU - Matsuo, H.

AU - Mauskopf, P. D.

AU - Murakoshi, Y.

AU - Montaña, A.

AU - Natarajan, P.

AU - Oshima, T.

AU - Ota, N.

AU - Perera, T. A.

AU - Rand, J.

AU - Scott, K. S.

AU - Tanaka, Kunihiko

AU - Tsuboi, M.

AU - Williams, C. C.

AU - Yamaguchi, N.

AU - Yun, M. S.

PY - 2008/11

Y1 - 2008/11

N2 - Deep 1.1 mm continuum observations of 1E0657-56 (the 'Bullet Cluster') taken with the millimeter-wavelength camera AzTEC on the 10-m Atacama Submillimeter Telescope Experiment (ASTE), have revealed an extremely bright (S1.1 mm = 15.9 mJy) unresolved source. This source, MMJ065837-5557.0, lies close to a maximum in the density of underlying mass distribution, towards the larger of the two interacting clusters as traced by the weak-lensing analysis of Clowe et al. Using optical-infrared (IR) colours, we argue that MMJ065837-5557.0 lies at a redshift of z = 2.7 ± 0.2. A lensing-derived mass model for the Bullet Cluster shows a critical line (caustic) of magnification within a few arcsec of the AzTEC source, sufficient to amplify the intrinsic millimetre-wavelength flux of the AzTEC galaxy by a factor of ≫20. After subtraction of the foreground cluster emission at 1.1 mm due to the Sunyaev-Zel'dovich effect, and correcting for the magnification, the rest-frame far-IR luminosity of MMJ065837-5557.0 is ≤1012 L ⊙, characteristic of a luminous infrared galaxy (LIRG). We explore various scenarios to explain the colours, morphologies and positional offsets between the potential optical and IR counterparts, and their relationship with MMJ065837-5557.0. Until higher resolution and more sensitive (sub)millimetre observations are available, the detection of background galaxies close to the caustics of massive lensing clusters offers the only opportunity to study this intrinsically faint millimetre-galaxy population.

AB - Deep 1.1 mm continuum observations of 1E0657-56 (the 'Bullet Cluster') taken with the millimeter-wavelength camera AzTEC on the 10-m Atacama Submillimeter Telescope Experiment (ASTE), have revealed an extremely bright (S1.1 mm = 15.9 mJy) unresolved source. This source, MMJ065837-5557.0, lies close to a maximum in the density of underlying mass distribution, towards the larger of the two interacting clusters as traced by the weak-lensing analysis of Clowe et al. Using optical-infrared (IR) colours, we argue that MMJ065837-5557.0 lies at a redshift of z = 2.7 ± 0.2. A lensing-derived mass model for the Bullet Cluster shows a critical line (caustic) of magnification within a few arcsec of the AzTEC source, sufficient to amplify the intrinsic millimetre-wavelength flux of the AzTEC galaxy by a factor of ≫20. After subtraction of the foreground cluster emission at 1.1 mm due to the Sunyaev-Zel'dovich effect, and correcting for the magnification, the rest-frame far-IR luminosity of MMJ065837-5557.0 is ≤1012 L ⊙, characteristic of a luminous infrared galaxy (LIRG). We explore various scenarios to explain the colours, morphologies and positional offsets between the potential optical and IR counterparts, and their relationship with MMJ065837-5557.0. Until higher resolution and more sensitive (sub)millimetre observations are available, the detection of background galaxies close to the caustics of massive lensing clusters offers the only opportunity to study this intrinsically faint millimetre-galaxy population.

KW - Galaxies: high-redshift

KW - Galaxies: starburst

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