H I column densities of<i>z</i>> 2<i>Swift</i>gamma-ray bursts
P. JakobssonCentre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield, Herts AL10 9AB, UKJ. P. U. FynboDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, DenmarkC. LedouxEuropean Southern Observatory, Alonso de Córdova 3107, Casilla 19001, Vitacura, Santiago, ChileP. M. VreeswijkDepartamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, ChileД. А. КаннThüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, GermanyJ. HjorthDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, DenmarkR. S. PriddeyCentre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield, Herts AL10 9AB, UKN. R. TanvirDepartment of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UKD. E. ReichartDepartment of Physics and Astronomy, University of North Carolina at Chapel Hill, Campus Box 3255, Chapel Hill, NC 27599, USAJ. GorosabelInstituto de Astrofísica de Andalucía (CSIC), Apartado de Correos 3004, 18080 Granada, SpainS. KloseThüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, GermanyD. WatsonDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, DenmarkJ. SollermanDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, DenmarkA. S. FruchterSpace Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USAA. de Ugarte PostigoInstituto de Astrofísica de Andalucía (CSIC), Apartado de Correos 3004, 18080 Granada, SpainK. WiersemaAstronomical Institute Anton Pannekoek, University of Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, The NetherlandsG. BjörnssonScience Institute, University of Iceland, Dunhaga 3, 107 Reykjavík, IcelandRobert ChapmanCentre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield, Herts AL10 9AB, UKC. C. ThöneDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, DenmarkK. PedersenDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, DenmarkB. L. JensenDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark
2006yi
ABI
Abstract
Context.Before the launch of the Swift satellite, the majority of the gamma-ray burst (GRB) afterglows for which Lyα was redshifted into the observable spectrum showed evidence for a damped Lyα absorber. This small sample indicated that GRBs explode either in galaxies, or regions within them, having high neutral hydrogen column densities.
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