Статья

A PHOTOMETRIC REDSHIFT OF<i>z</i>∼ 9.4 FOR GRB 090429B

Antonino CucchiaraDepartment of Astronomy & Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, USA; [email protected]A. J. LevanDepartment of Physics, University of Warwick, Coventry, CV4 7AL, UKD. B. FoxDepartment of Astronomy & Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, USA; [email protected]N. R. TanvirDepartment of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH, UKT. N. UkwattaDepartment of Physics, The George Washington University, Washington, DC 20052, USAE. BergerHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAT. KrühlerMax-Planck-Institut für extraterrestrische Physik, Giessenbachstr. 1, 85740 Garching, GermanyA. YoldaşEuropean Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching, GermanyXue-Feng WuDepartment of Astronomy & Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, USA; [email protected]Kenji TomaDepartment of Astronomy & Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, USA; [email protected]J. GreinerMax-Planck-Institut für extraterrestrische Physik, Giessenbachstr. 1, 85740 Garching, GermanyF. E. OlivaresMax-Planck-Institut für extraterrestrische Physik, Giessenbachstr. 1, 85740 Garching, GermanyA. RowlinsonDepartment of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH, UKL. AmatiINAF-IASF Bologna, via P. Gobetti 101, 40129 Bologna, ItalyT. SakamotoNASA Goddard Space Flight Center, Greenbelt, MD 20771, USAKatherine C. RothGemini Observatory, 670 North A'ohoku Place, Hilo, HI 96720, USAAndrew W. StephensGemini Observatory, 670 North A'ohoku Place, Hilo, HI 96720, USAAlexander FritzGemini Observatory, 670 North A'ohoku Place, Hilo, HI 96720, USAJ. P. U. FynboDark Cosmology Centre, Niels Bohr Institute, Copenhagen University, Juliane Maries Vej 30, 2100 Copenhagen Ø, DenmarkJ. HjorthDark Cosmology Centre, Niels Bohr Institute, Copenhagen University, Juliane Maries Vej 30, 2100 Copenhagen Ø, DenmarkD. MalesaniDark Cosmology Centre, Niels Bohr Institute, Copenhagen University, Juliane Maries Vej 30, 2100 Copenhagen Ø, DenmarkP. JakobssonCentre for Astrophysics and Cosmology, Science Institute, University of Iceland, Dunhagi 5, IS-107 Reykjavík, IcelandK. WiersemaDepartment of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH, UKP. T. O’BrienDepartment of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH, UKA. M. SoderbergHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAR. J. FoleyHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAA. S. FruchterSpace Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USAJames E. RhoadsSchool of Earth & Space Exploration, Arizona State University, Box 871404, Tempe, AZ 85287-1404, USARobert E. RutledgePhysics Department, McGill University, 3600 rue University, Montreal, QC H3A 2T8, CanadaB. SchmidtResearch School of Astronomy & Astrophysics, The Australian National University, Cotter Road, Weston Creek ACT 2611, AustraliaM. A. DopitaResearch School of Astronomy & Astrophysics, The Australian National University, Cotter Road, Weston Creek ACT 2611, AustraliaPhilipp PodsiadlowskiDepartment of Physics, Oxford University, Keble Road, Oxford, OX1 3RH, UKR. WillingaleDepartment of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH, UKChristian WolfDepartment of Physics, Oxford University, Keble Road, Oxford, OX1 3RH, UKS. R. KulkarniDepartment of Astronomy, California Institute of Technology, MC 249-17, Pasadena, CA 91125, USAP. D’AvanzoINAF-Osservatorio Astronomico di Brera, via Bianchi 46, 23807 Merate, Italy

2011he

ABI

Аннотация

Gamma-ray bursts (GRBs) serve as powerful probes of the early universe, with their luminous afterglows revealing the locations and physical properties of star-forming galaxies at the highest redshifts, and potentially locating firstgeneration (Population III) stars. Since GRB afterglows have intrinsically very simple spectra, they allow robust redshifts from low signal-to-noise spectroscopy, or photometry. Here we present a photometric redshift of z 9.4 for the Swift detected GRB 090429B based on deep observations with Gemini-North, the Very Large Telescope, and the GRB Optical and Near-infrared Detector. Assuming a Small Magellanic Cloud dust law (which has been found in a majority of GRB sight lines), the 90% likelihood range for the redshift is 9.06 < z < 9.52, although there is a low-probability tail toward somewhat lower redshifts. Adopting Milky Way or Large Magellanic Cloud dust laws leads to very similar conclusions, while a Maiolino law does allow somewhat lower redshift solutions, though in all cases the most likely redshift is found to be z > 7. The non-detection of the host galaxy to deep limits (Y (AB) 28, which would correspond roughly to 0.001L * at z = 1) in our late-time optical and infrared observations with the Hubble Space Telescope strongly supports the extreme-redshift origin of GRB 090429B, since we would expect to have detected any low-z galaxy, even if it were highly dusty. Finally, the energetics of GRB 090429B are comparable to those of other GRBs and suggest that its progenitor is not greatly different from those of lower redshift bursts.

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Идентификаторы

DOI: 10.1088/0004-637x/736/1/7

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Цитирований: 2Использованных источников: 0

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