GRB 160410A: The first chemical study of the interstellar medium of a short GRB

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  • J. F. Aguei Fernandez
  • C. C. Thone
  • D. A. Kann
  • A. de Ugarte Postigo
  • J. Selsing
  • P. Schady
  • R. M. Yates
  • J. Greiner
  • S. R. Oates
  • D. B. Malesani
  • D. Xu
  • A. Klotz
  • S. Campana
  • A. Rossi
  • D. A. Perley
  • M. Blazek
  • P. D'Avanzo
  • A. Giunta
  • D. Hartmann
  • P. Jakobsson
  • C. C. Kirkpatrick
  • C. Kouveliotou
  • A. Melandri
  • G. Pugliese
  • R. Salvaterra
  • R. L. C. Starling
  • N. R. Tanvir
  • S. D. Vergani
  • K. Wiersema

Short gamma-ray bursts (SGRBs) are produced by the coalescence of compact binary systems which are remnants of massive stars. GRB 160410A is classified as a short-duration GRB with extended emission and is currently the farthest SGRB with a redshift determined from an afterglow spectrum and also one of the brightest SGRBs to date. The fast reaction to the Neil Gehrels Swift Observatory alert allowed us to obtain a spectrum of the afterglow using the X-shooter spectrograph at the Very Large Telescope (VLT). The spectrum shows several absorption features at a redshift of z = 1.7177, in addition, we detect two intervening systems at z = 1.581 and z = 1.444. The spectrum shows Ly alpha in absorption with a column density of log (N(H i)/cm(2)) = 21.2 +/- 0.2 which, together with Fe ii, C ii, Si ii, Al ii, and O i, allow us to perform the first study of chemical abundances in a SGRB host galaxy. We determine a metallicity of [X/H] = -2.3 +/- 0.2 for Fe ii and -2.5 +/- 0.2 for Si ii and no dust depletion. We also find no evidence for extinction in the afterglow spectral energy distribution modelling. The environment has a low degree of ionization and the C iv and Si iv lines are completely absent. We do not detect an underlying host galaxy down to deep limits. Additionally, we compare GRB 160410A to GRB 201221D, another high-z short GRB that shows absorption lines at z = 1.045 and an underlying massive host galaxy.

Original languageEnglish
JournalMonthly Notices of the Royal Astronomical Society
Volume520
Issue number1
Pages (from-to)613-636
Number of pages24
ISSN0035-8711
DOIs
Publication statusPublished - 28 Jan 2023

    Research areas

  • gamma-ray burst: individual: GRB 160410A, gamma-ray burst: individual: GRB 201221D, galaxies: ISM, neutron star mergers, GAMMA-RAY BURST, DAMPED LY-ALPHA, COMPACT OBJECT MERGERS, HOST GALAXIES, STAR-FORMATION, X-RAY, GRAVITATIONAL-WAVES, RADIO OBSERVATIONS, TIME DISTRIBUTION, REVERSE SHOCK

ID: 341012656