The nature of H I absorbers in gamma-ray burst afterglows: clues from hydrodynamic simulations
@article{Pontzen2010TheNO, title={The nature of H I absorbers in gamma-ray burst afterglows: clues from hydrodynamic simulations}, author={Andrew Pontzen and Alis J. Deason and Fabio Governato and Max Pettini and James Wadsley and Thomas R. Quinn and Alyson M. Brooks and Jillian M. Bellovary and Johan P. U. Fynbo}, journal={Monthly Notices of the Royal Astronomical Society}, year={2010}, volume={402}, pages={1523-1535} }
In recent work, we have shown that it is possible to link quantitatively many aspects of damped Lyman α (DLA) absorbers in the spectra of quasars to high-resolution simulations of galaxy formation. Using runs from the same series of hydrodynamic numerical studies, we consider the expected properties of intrinsic Lyman α absorbers seen in the spectra of high-redshift (z > 2) gamma-ray burst afterglows (GRB–DLAs). If GRBs are associated with the death of massive stars, their afterglows provide…
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References
SHOWING 1-10 OF 72 REFERENCES
HI column densities of z > 2 Swift gamma-ray bursts
- Physics
- 2006
Context: .Before the launch of the Swift satellite, the majority of the gamma-ray burst (GRB) afterglows for which Lyalpha was redshifted into the observable spectrum showed evidence for a damped…
Dissecting the circumstellar environment of γ-ray burst progenitors
- Physics
- 2006
We investigate properties of the interstellar medium (ISM) in galaxies hosting long-duration γ-ray bursts (GRBs) from an analysis of atomic species (Mg0, Fe0) and excited fine-structure levels of…
Physical conditions in high-redshift GRB-DLA absorbers observed with VLT/UVES: implications for molecular hydrogen searches
- Physics
- 2009
Aims. We aim to understand the nature of the absorbing neutral gas in the galaxies hosting high-redshift long-duration gamma-ray bursts (GRBs) and to determine their physical conditions. Methods. A…
A New Constraint on the Escape Fraction in Distant Galaxies Using γ-Ray Burst Afterglow Spectroscopy
- Physics
- 2007
We describe a new method to measure the escape fraction fesc of ionizing radiation from distant star-forming galaxies using the afterglow spectra of long-duration γ-ray bursts (GRBs). Optical spectra…
Damped Lyman α systems in high‐resolution hydrodynamical simulations
- Physics
- 2009
We investigate the properties of damped Lyman α systems (DLAs) using high-resolution and large box-size cosmological hydrodynamical simulations of a A cold dark matter model. The numerical code used…
Probing the Interstellar Medium near Star-forming Regions with Gamma-Ray Burst Afterglow Spectroscopy: Gas, Metals, and Dust
- Physics
- 2007
We study the chemical abundances of the interstellar medium surrounding high-z gamma-ray bursts (GRBs) through analysis of the damped Lyα systems (DLAs) identified in afterglow spectra. These GRB…
A Survey for N V Absorption at z ≈ zGRB in GRB Afterglow Spectra: Clues to Gas Near the Progenitor Star
- Physics
- 2008
We survey N V absorption in the afterglow spectra of long-duration gamma-ray bursts (GRBs) with the intent to study highly ionized gas in the galaxies hosting these events. We identify a high…
HEAVY-ELEMENT ABUNDANCES AND DUST DEPLETIONS IN THE HOST GALAXIES OF THREE GAMMA-RAY BURSTS
- Physics
- 2003
We have derived the column densities of heavy elements in three gamma-ray burst (GRB) optical transients, associated with the circumburst or interstellar medium (ISM) of the host galaxy. In…
Incidence Rate of GRB-Host DLAs at High Redshift
- Physics
- 2008
We study the incidence rate of damped Ly α systems associated with the host galaxies of gamma-ray bursts (GRB-host DLAs) as functions of neutral hydrogen column density (NH I) and projected star…
The host of GRB 030323 at z=3.372: A very high column density DLA system with a low metallicity
- Physics
- 2004
We present photometry and spectroscopy of the afterglow of GRB 030323. VLT spectra of the afterglow show damped Lyα (DLA) absorption and low- and high-ionization lines at a redshift z = 3.3718 ±…