Probing the Warm Intergalactic Medium through Absorption against Gamma-Ray Burst X-Ray Afterglows | Zendy

F. Fiore | Zendy; F. Nicastro | Zendy; S. Savaglio | Zendy; L. Stella | Zendy; M. Vietri | Zendy

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Probing the Warm Intergalactic Medium through Absorption against Gamma-Ray Burst X-Ray Afterglows

Author(s) -

F. Fiore,

F. Nicastro,

S. Savaglio,

L. Stella,

M. Vietri

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/317286

Subject(s) - physics , astrophysics , gamma ray burst , redshift , galaxy , intergalactic travel , astronomy , baryon , cosmic ray , sky , flux (metallurgy) , universe , telescope , absorption (acoustics) , optics , materials science , metallurgy

Gamma Ray Burst (GRB) afterglows close to their peak intensity are among thebrightest X-ray sources in the sky. Despite their fast power-law like decay,when fluxes are integrated from minutes up to hours after the GRB event, thecorresponding number counts (logN-logF relation) far exceeds that of any otherhigh redshift (z>0.5) source, the flux of which is integrated over the sametime interval. We discuss how to use X-ray afterglows of GRBs as distantbeacons to probe the warm (10^5 K=300) would be very well suited toexploit the new diagnostic and study the physical conditions in the Universe atthe critical moment when structure is being formed.Comment: ApJ Letters in pres

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