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Chandra and Hubble Space Telescope observations of dark gamma-ray bursts and their host galaxies
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Chrimes, Ashley, Levan, Andrew J., Stanway, Elizabeth R., Lyman, J.D., Fruchter, A., Jakobsson, P., O’Brien, P., Perley, D.A., Tanvir, N.R., Wheatley, Peter J. and Wiersema, Klaas (2019) Chandra and Hubble Space Telescope observations of dark gamma-ray bursts and their host galaxies. Monthly Notices of the Royal Astronomical Society, 486 (3). doi:10.1093/mnras/stz1039
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WRAP-Chandra-Hubble Space-Telescope-observations-dark-gamma-ray-bursts-host-galaxies-Chrimes-2019.pdf - Accepted Version - Requires a PDF viewer. Download (2483Kb) | Preview |
Official URL: https://doi.org/10.1093/mnras/stz1039
Abstract
We present a study of 21 dark gamma-ray burst (GRB) host galaxies, predominantly using X-ray afterglows obtained with the Chandra X-Ray Observatory (CXO) to precisely locate the burst in deep Hubble Space Telescope (HST) imaging of the burst region. The host galaxies are well-detected in F160W in all but one case and in F606W imaging in ∼ 60 per cent of cases. We measure magnitudes and perform a morphological analysis of each galaxy. The asymmetry, concentration and ellipticity of the dark burst hosts are compared against the host galaxies of optically bright GRBs. In agreement with other studies, we find that dark GRB hosts are redder and more luminous than the bulk of the GRB host population. The distribution of projected spatial offsets for dark GRBs from their host galaxy centroids is comparable to that of optically-bright bursts. The dark GRB hosts are physically larger, more massive and redder, but are morphologically similar to the hosts of bright GRBs in terms of concentration and asymmetry. Our analysis constrains the fraction of high redshift (z > 5) GRBs in the sample to ∼14 per cent, implying an upper limit for the whole long-GRB population of ≤4.4 per cent. If dust is the primary cause of afterglow darkening amongst dark GRBs, the measured extinction may require a clumpy dust component in order to explain the observed offset and ellipticity distributions.
| Item Type: | Journal Article | |||||||||||||||||||||
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| Subjects: | Q Science > QB Astronomy | |||||||||||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Gamma ray bursts | |||||||||||||||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | |||||||||||||||||||||
| Publisher: | Oxford University Press | |||||||||||||||||||||
| ISSN: | 1745-3933 | |||||||||||||||||||||
| Official Date: | July 2019 | |||||||||||||||||||||
| Dates: |
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| Volume: | 486 | |||||||||||||||||||||
| Number: | 3 | |||||||||||||||||||||
| DOI: | 10.1093/mnras/stz1039 | |||||||||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||||||||
| Publication Status: | Published | |||||||||||||||||||||
| Reuse Statement (publisher, data, author rights): | This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record A A Chrimes, A J Levan, E R Stanway, J D Lyman, A S Fruchter, P Jakobsson, P O’Brien, D A Perley, N R Tanvir, P J Wheatley, K Wiersema, Chandra and Hubble Space Telescope observations of dark gamma-ray bursts and their host galaxies, Monthly Notices of the Royal Astronomical Society, Volume 486, Issue 3, July 2019, Pages 3105–3117, https://0-doi-org.pugwash.lib.warwick.ac.uk/10.1093/mnras/stz1039 is available online at: https://doi.org/10.1093/mnras/stz1039 | |||||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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