Detection of three gamma-ray burst host galaxies at z ∼ 6

J. T.W. McGuire, N. R. Tanvir, A. J. Levan, M. Trenti, E. R. Stanway, J. M. Shull, K. Wiersema, D. A. Perley, R. L.C. Starling, M. Bremer, J. T. Stocke, J. Hjorth, J. E. Rhoads, E. Curtis-Lake, S. Schulze, E. M. Levesque, Brant E Robertson, J. P.U. Fynbo, R. S. Ellis, A. S. Fruchter

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Long-duration gamma-ray bursts (GRBs) allow us to pinpoint and study star-forming galaxies in the early universe, thanks to their orders of magnitude brighter peak luminosities compared to other astrophysical sources, and their association with the deaths of massive stars. We present Hubble Space Telescope Wide Field Camera 3 detections of three Swift GRB host galaxies lying at redshifts z = 5.913 (GRB 130606A), z = 6.295 (GRB 050904), and z = 6.327 (GRB 140515A) in the F140W (wide-JH band, λobs ∼ 1.4μm) filter. The hosts have magnitudes (corrected for Galactic extinction) of mλobsAB = 26.34-0.16 +0.14, 27.56-0.22 +0.18, and 28.30-0.33 +0.25, respectively. In all three cases, the probability of chance coincidence of lower redshift galaxies is ≲2%, indicating that the detected galaxies are most likely the GRB hosts. These are the first detections of high-redshift () GRB host galaxies in emission. The galaxies have luminosities in the range 0.1-0.6 Lz=6 (with M1600∗ = -20.95±0.12) and half-light radii in the range 0.6-0.9 kpc. Both their half-light radii and luminosities are consistent with existing samples of Lyman-break galaxies at z∼6. Spectroscopic analysis of the GRB afterglows indicate low metallicities ([M/H]≲-1) and low dust extinction (AV ≲ 0.1) along the line of sight. Using stellar population synthesis models, we explore the implications of each galaxy's luminosity for its possible star-formation history and consider the potential for emission line metallicity determination with the upcoming James Webb Space Telescope.

Original languageEnglish (US)
Article number135
JournalAstrophysical Journal
Volume825
Issue number2
DOIs
StatePublished - Jul 10 2016
Externally publishedYes

Fingerprint

gamma ray bursts
galaxies
extinction
luminosity
metallicity
dust
filter
James Webb Space Telescope
radii
detection
spectroscopic analysis
history
afterglows
massive stars
Hubble Space Telescope
death
line of sight
star formation
astrophysics
universe

Keywords

  • galaxies: high-redshift
  • galaxies: luminosity function, mass function
  • galaxies: star formation
  • gamma-ray burst: individual (GRB 130606A, GRB 050904, GRB 140515A)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

McGuire, J. T. W., Tanvir, N. R., Levan, A. J., Trenti, M., Stanway, E. R., Shull, J. M., ... Fruchter, A. S. (2016). Detection of three gamma-ray burst host galaxies at z ∼ 6. Astrophysical Journal, 825(2), [135]. https://doi.org/10.3847/0004-637X/825/2/135

Detection of three gamma-ray burst host galaxies at z ∼ 6. / McGuire, J. T.W.; Tanvir, N. R.; Levan, A. J.; Trenti, M.; Stanway, E. R.; Shull, J. M.; Wiersema, K.; Perley, D. A.; Starling, R. L.C.; Bremer, M.; Stocke, J. T.; Hjorth, J.; Rhoads, J. E.; Curtis-Lake, E.; Schulze, S.; Levesque, E. M.; Robertson, Brant E; Fynbo, J. P.U.; Ellis, R. S.; Fruchter, A. S.

In: Astrophysical Journal, Vol. 825, No. 2, 135, 10.07.2016.

Research output: Contribution to journalArticle

McGuire, JTW, Tanvir, NR, Levan, AJ, Trenti, M, Stanway, ER, Shull, JM, Wiersema, K, Perley, DA, Starling, RLC, Bremer, M, Stocke, JT, Hjorth, J, Rhoads, JE, Curtis-Lake, E, Schulze, S, Levesque, EM, Robertson, BE, Fynbo, JPU, Ellis, RS & Fruchter, AS 2016, 'Detection of three gamma-ray burst host galaxies at z ∼ 6', Astrophysical Journal, vol. 825, no. 2, 135. https://doi.org/10.3847/0004-637X/825/2/135
McGuire JTW, Tanvir NR, Levan AJ, Trenti M, Stanway ER, Shull JM et al. Detection of three gamma-ray burst host galaxies at z ∼ 6. Astrophysical Journal. 2016 Jul 10;825(2). 135. https://doi.org/10.3847/0004-637X/825/2/135
McGuire, J. T.W. ; Tanvir, N. R. ; Levan, A. J. ; Trenti, M. ; Stanway, E. R. ; Shull, J. M. ; Wiersema, K. ; Perley, D. A. ; Starling, R. L.C. ; Bremer, M. ; Stocke, J. T. ; Hjorth, J. ; Rhoads, J. E. ; Curtis-Lake, E. ; Schulze, S. ; Levesque, E. M. ; Robertson, Brant E ; Fynbo, J. P.U. ; Ellis, R. S. ; Fruchter, A. S. / Detection of three gamma-ray burst host galaxies at z ∼ 6. In: Astrophysical Journal. 2016 ; Vol. 825, No. 2.
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AU - Wiersema, K.

AU - Perley, D. A.

AU - Starling, R. L.C.

AU - Bremer, M.

AU - Stocke, J. T.

AU - Hjorth, J.

AU - Rhoads, J. E.

AU - Curtis-Lake, E.

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AU - Levesque, E. M.

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KW - gamma-ray burst: individual (GRB 130606A, GRB 050904, GRB 140515A)

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