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| HAL : hal-00193524, version 1 |
| arXiv : astro-ph/0611486 |
| Code Bibliographique ADS : 2007ApJ...654L..33S |
| DOI : 10.1086/510902 |
| Fiche détaillée |  Récupérer au format |
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| The Astrophysical Journal 654 (2007) L33-L36 |
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| A Very Bright, Highly Magnified Lyman Break Galaxy at z = 3.07 |
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| Ian Smail 1A. M. Swinbank |
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| (01/2007) |
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| Using Hubble Space Telescope imaging and Keck spectroscopy, we report the discovery of a very bright, highly magnified (~30 times) Lyman break galaxy (LBG) at z=3.07 in the field of the massive z=0.33 cluster MACS J2135.2-0102. The system comprises two high surface brightness arcs with a maximum extent of 3", bracketing a central object that we identify as a massive early-type galaxy at z=0.73. We construct a lens model that reproduces the main features of the system using a combination of a galaxy-scale lens and the foreground cluster. We show that the morphological, spectral, and photometric properties of the arcs are consistent with them arising from the lensing of a single ~L*V LBG. The most important feature of this system is that the lensing magnification results in an apparent magnitude of r=20.3, making this one of the brightest LBGs known. Such a high magnification provides the opportunity of obtaining very high signal-to-noise ratio (and potentially spatially resolved) spectroscopy of a high-redshift galaxy to study its physical properties. We present initial imaging and spectroscopy demonstrating the basic properties of the system and discuss the opportunities for future observations. |
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| 1 : | Institute for Computational Cosmology (ICC) |
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University of Durham |
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| 2 : | California Institute of Technology (Caltech) |
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California Institute of Technology |
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| 3 : | Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (LATT) |
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CNRS : UMR5572 – INSU – Observatoire Midi-Pyrénées – Université Paul Sabatier [UPS] - Toulouse III |
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| 4 : | Institute for Astronomy (CFHT) |
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University of Hawaii |
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| 5 : | Laboratoire d'Astrophysique de Marseille (LAM) |
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CNRS : UMR6110 – INSU – Université de Provence - Aix-Marseille I |
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| 6 : | Department of Physics |
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The University of Wales |
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| 7 : | Thomas Jefferson National Accelerator Facility (Jefferson Lab) |
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Thomas Jefferson National Accelerator Facility |
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| 8 : | University of Reading (UOR) |
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University of Reading |
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| Domaine | : | Planète et Univers/Astrophysique |
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| Cosmology: Observations – Galaxies: Evolution – Galaxies: Formation – galaxies: individual (LBG J213512.73-010143) |
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| Lien vers le texte intégral : |
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| http://fr.arXiv.org/abs/astro-ph/0611486 |
| hal-00193524, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00193524 | |
| oai:hal.archives-ouvertes.fr:hal-00193524 | |
| Contributeur : Johan Richard | |
| Soumis le : Lundi 3 Décembre 2007, 18:45:57 | |
| Dernière modification le : Lundi 3 Décembre 2007, 18:45:57 | |
