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Predicted optical/ultraviolet line fluxes for the warm absorber in Abell 2256Recently Miyaji et al. (1993) detected excess soft X-ray absorption in the Broad Band X Ray Telescope (BBXRT) spectrum of the cluster A2256. The absorption was due to the K-edge of oxygen; from the observed edge energy and the redshift of the cluster, Miyaji et al. argued that the primary absorber was oxygen in an ionization state between O(+2) and O(+4) at a temperature in the range 0.5-5 x 10(exp 5) K. Such gas should produce strong UV and optical line emission. We predict the strongest UV and optical line fluxes for this X-ray absorbing gas. The strongest UV lines include Lyman-alpha, C III lambda-1909, C IV lambda-1549, O IV lambda-1401, O V lambda-1218, O VI lambda-1034, Si III lambda-1207, and Si IV lambda-1397 lines. These lines should be detectable with the International Ultraviolet Explorer, the Hubble Space Telescope, or the Hopkins Ultraviolet Telescope. In the optical the lines are weaker, but the (O II) lambda lambda-3726, 3729, (O III) lambda lambda-4959, 5007, (N II) lambda lambda-6567, 6584, (Ne III) lambda lambda-3918, 3969, (S II) lambda-6720, and (S III) lambda-9320 lines should be detected with moderate exposures if the warm absorber is near the lower limit of the allowed temperature range, T less than or approximately equal to 1.5 x 10(exp 5) K. In this limit the H-alpha and (S III) lambda-3720 lines will require longer exposure times, but should be detectable as well.
Document ID
19950040856
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Pistinner, Shlomi
(University of Virginia, Charlottesville, VA United States)
Sarazin, Craig L.
(University of Virginia, Charlottesville, VA United States)
Date Acquired
August 16, 2013
Publication Date
October 1, 1994
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 433
Issue: 2
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
95A72455
Funding Number(s)
CONTRACT_GRANT: NAGW-2376
Distribution Limits
Public
Copyright
Other

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