Studying the warm hot intergalactic medium with gamma-ray bursts

E. Branchini, E. Ursino, A. Corsi, D. Martizzi, L. Amati, J. W. Den Herder, Massimiliano Galeazzi, B. Gendre, J. Kaastra, L. Moscardini, F. Nicastro, T. Ohashi, F. Paerels, L. Piro, M. Roncarelli, Y. Takei, M. Viel

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

We assess the possibility of detecting and characterizing the physical state of the missing baryons at low redshift by analyzing the X-ray absorption spectra of the gamma-ray burst (GRB) afterglows, measured by a microcalorimeter-based detector with 3 eV resolution and 1000 cm2 effective area and capable of fast repointing, similar to that on board of the recently proposed X-ray satellites EDGE and XENIA. For this purpose we have analyzed mock absorption spectra extracted from different hydrodynamical simulations used to model the properties of the warm hot intergalactic medium (WHIM). These models predict the correct abundance of Ovi absorption lines observed in UV and satisfy current X-ray constraints. According to these models space missions such as EDGE and XENIA should be able to detect ∼60 WHIM absorbers per year through the Ovii line. About 45% of these have at least two more detectable lines in addition to Ovii that can be used to determine the density and the temperature of the gas. Systematic errors in the estimates of the gas density and temperature can be corrected for in a robust, largely model-independent fashion. The analysis of the GRB absorption spectra collected in three years would also allow to measure the cosmic mass density of the WHIM with ∼15% accuracy, although this estimate depends on the WHIM model. Our results suggest that GRBs represent a valid, if not preferable, alternative to active galactic nuclei to study the WHIM in absorption. The analysis of the absorption spectra nicely complements the study of the WHIM in emission that the spectrometer proposed for EDGE and XENIA would be able to carry out thanks to its high sensitivity and large field of view.

Original languageEnglish (US)
Pages (from-to)328-344
Number of pages17
JournalAstrophysical Journal
Volume697
Issue number1
DOIs
StatePublished - May 20 2009

Fingerprint

intergalactic media
gamma ray bursts
absorption spectrum
absorption spectra
field of view
x rays
gas
gas density
space missions
estimates
gas temperature
afterglows
active galactic nuclei
systematic errors
spectrometer
complement
temperature
calorimeters
baryons
absorbers

Keywords

  • Cosmology: observations
  • Gamma rays: bursts
  • Intergalactic medium
  • Large-scale structure of universe
  • Line: identification

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Branchini, E., Ursino, E., Corsi, A., Martizzi, D., Amati, L., Den Herder, J. W., ... Viel, M. (2009). Studying the warm hot intergalactic medium with gamma-ray bursts. Astrophysical Journal, 697(1), 328-344. https://doi.org/10.1088/0004-637X/697/1/328

Studying the warm hot intergalactic medium with gamma-ray bursts. / Branchini, E.; Ursino, E.; Corsi, A.; Martizzi, D.; Amati, L.; Den Herder, J. W.; Galeazzi, Massimiliano; Gendre, B.; Kaastra, J.; Moscardini, L.; Nicastro, F.; Ohashi, T.; Paerels, F.; Piro, L.; Roncarelli, M.; Takei, Y.; Viel, M.

In: Astrophysical Journal, Vol. 697, No. 1, 20.05.2009, p. 328-344.

Research output: Contribution to journalArticle

Branchini, E, Ursino, E, Corsi, A, Martizzi, D, Amati, L, Den Herder, JW, Galeazzi, M, Gendre, B, Kaastra, J, Moscardini, L, Nicastro, F, Ohashi, T, Paerels, F, Piro, L, Roncarelli, M, Takei, Y & Viel, M 2009, 'Studying the warm hot intergalactic medium with gamma-ray bursts', Astrophysical Journal, vol. 697, no. 1, pp. 328-344. https://doi.org/10.1088/0004-637X/697/1/328
Branchini E, Ursino E, Corsi A, Martizzi D, Amati L, Den Herder JW et al. Studying the warm hot intergalactic medium with gamma-ray bursts. Astrophysical Journal. 2009 May 20;697(1):328-344. https://doi.org/10.1088/0004-637X/697/1/328
Branchini, E. ; Ursino, E. ; Corsi, A. ; Martizzi, D. ; Amati, L. ; Den Herder, J. W. ; Galeazzi, Massimiliano ; Gendre, B. ; Kaastra, J. ; Moscardini, L. ; Nicastro, F. ; Ohashi, T. ; Paerels, F. ; Piro, L. ; Roncarelli, M. ; Takei, Y. ; Viel, M. / Studying the warm hot intergalactic medium with gamma-ray bursts. In: Astrophysical Journal. 2009 ; Vol. 697, No. 1. pp. 328-344.
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AU - Branchini, E.

AU - Ursino, E.

AU - Corsi, A.

AU - Martizzi, D.

AU - Amati, L.

AU - Den Herder, J. W.

AU - Galeazzi, Massimiliano

AU - Gendre, B.

AU - Kaastra, J.

AU - Moscardini, L.

AU - Nicastro, F.

AU - Ohashi, T.

AU - Paerels, F.

AU - Piro, L.

AU - Roncarelli, M.

AU - Takei, Y.

AU - Viel, M.

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