Confusion of Diffuse Objects in the X-Ray Sky | Zendy

G. Mark Voit | Zendy; A. E. Evrard | Zendy; Greg L. Bryan | Zendy

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Confusion of Diffuse Objects in the X-Ray Sky

Author(s) -

G. Mark Voit,

A. E. Evrard,

Greg L. Bryan

Publication year - 2001

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 - 10.1086/319102

Subject(s) - physics , intergalactic travel , astrophysics , confusion , intergalactic dust , supernova , sky , astronomy , intergalactic medium , cosmic ray , active galactic nucleus , x ray background , baryon , galaxy , redshift , psychology , psychoanalysis

Most of the baryons in the present-day universe are thought to reside inintergalactic space at temperatures of 10^5-10^7 K. X-ray emission from thesebaryons contributes a modest (~10%) fraction of the ~ 1 keV background whoseprominence within the large-scale cosmic web depends on the amount ofnon-gravitational energy injected into intergalactic space by supernovae andAGNs. Here we show that the virialized regions of groups and clusters coverover a third of the sky, creating a source-confusion problem that may hinderX-ray searches for individual intercluster filaments and contaminateobservations of distant groups.Comment: accepted to ApJ Letters, 7 pages, 3 figure

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