Radio Afterglows of Gamma-Ray Bursts and Hypernovae at High Redshift, and their Potential for 21-cm Absorption Studies
arXiv:astro-ph/0408487 · doi:10.1086/426785
Abstract
We investigate the radio afterglows of gamma-ray bursts (GRBs) and hypernovae (HNe) at high redshifts and quantify their detectability, as well as their potential usefulness for 21 cm absorption line studies of the intergalactic medium (IGM) and intervening structures. We examine several sets of source and environment model parameters that are physically plausible at high redshifts. The radio afterglows of GRBs would be detectable out to z ~ 30, while the energetic HNe could be detectable out to z ~ 20 even by the current Very Large Array (VLA). We find that the 21 cm absorption line due to the diffuse neutral IGM is difficult to detect even by the proposed Square Kilometer Array (SKA), except for highly energetic sources. We also find that the 21 cm line due to collapsed gas clouds with high optical depth may be detected on rare occasions.
36 pages, 12 figures, 1 table, accepted for publication in ApJ
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- Stellar Tidal Disruption Events by Direct Collapse Black Holes
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- Searching for the first stars with the Gaia mission
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- Spatial Correlation of Massive Black Hole Mergers: Probing the Formation Mechanism and Reionization
- Analytical modeling of the one-dimensional power spectrum of 21-cm forest based on a halo model method